CS-2009 IEQc3: Construction IAQ Management Plan—During Construction

  • CS IEQc3 Type3 Construction IAQ Diagram
  • Good IAQ benefits everyone

    Managing indoor air quality (IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors.) systematically during construction is becoming more and more common as contractors gain more experience with LEED. It benefits the health of everyone who works on the site, not just the eventual occupants of the building. 

    Not a one-time thing

    Earning this credit can be fairly easy, but it does require careful coordination and buy-in from all the subcontractors and field personnel involved in the project. It’s important to remember that IAQ management is not a one-time compliance event that can be checked off a list—it must be an ongoing effort for the duration of the construction process.

    The contractor should create the IAQ management plan before construction even begins, and check on compliance at various times throughout the process—including collecting photos on a minimum of three separate dates for credit documentation.

    SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. guidelines call for measures like wrapping ductwork to prevent dust from entering it during construction. (The commissioningThe process of verifying and documenting that a building and all of its systems and assemblies are planned, designed, installed, tested, operated, and maintained to meet the owner's project requirements. process is supposed to catch poorly coordinated practices like the meeting of the sprinklers and ductwork here.) Photo – YRG Sustainability

    HVAC wrappingSMACNA guidelines call for measures like wrapping ductwork to prevent dust from entering it during construction. (The commissioning process is supposed to catch poorly coordinated practices like the meeting of the sprinklers and ductwork here.) Photo – YRG Sustainability

    Know the standard

    LEED requires you follow the SMACNA 2007 guidelines. (See Resources.) Chapter 3 of the guide describes Indoor Air Quality (IAQ) management. The standard was updated in 2008, but is virtually identical to the older version referenced in earlier versions of the LEED rating system. Note that although the SMACNA guidelines say they are for "occupied buildings under construction," these guidelines must be used by all LEED projects attempting this credit—occupied or not.

    The SMACNA 2007 document describes common sources for construction indoor air pollution and offers best practices to address them. When developing the IAQ Management Plan, the contractor should incorporate all of the recommended guidelines that are applicable to the project. 

    The following are the major areas covered by SMACNA.

    • HVAC Protection: Make sure that dust and construction debris do not accumulate in HVAC ducts. Strategies include wrapping HVAC ducts in plastic and storing ductwork in dust free areas before installing.
    • Source Control: Address the sources of construction pollution and looking for ways to reduce them. Strategies include using low-VOCA volatile organic compound (VOC) is a carbon compound that vaporizes (becomes a gas) at normal room temperatures. VOCs contribute to air pollution directly and through atmospheric photochemical reactions (excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides and carbonates, and ammonium carbonate) to produce secondary air pollutants, principally ozone and peroxyacetyl nitrate. materials, paints, coatings, adhesives, sealantsA sealant has adhesive properties and is formulated primarily to fill, seal, or waterproof gaps or joints between 2 surfaces. Sealants include sealant primers and caulks. (SCAQMD Rule 1168. )Sealants are used on wood, fabric, paper, corrugated paperboard, plastic foam and other materials with tiny openings, often microscopic, that may absorb or discharge gas or fluid. (as covered in IEQc4.1–4.4); exhausting gas-fueled construction equipment directly to the outside; and storing VOC-containing materials away from absorptive materials.
    • Pathway Interruption: Use negative pressure and or temporary hanging plastic to contain areas that may generate construction dust, for example, wood-cutting and drywall-cutting areas.
    • Housekeeping: Keep a clean work site by sweeping, wet mopping and using low-VOC cleaners.
    • Scheduling: Coordinate the movement of occupants to minimize their exposure to construction debris; schedule installation of absorptive materials to limit the materials’ exposure to VOCs and moisture.

     

    HVAC components that are poorly protected from dust and construction debris, as in this photo, can cause equipment malfunctions and poor IAQ during occupancy.

    Poorly covered ductsHVAC components that are poorly protected from dust and construction debris, as in this photo, can cause equpiment malfunctions and poor IAQ during occupancy.

    More than just SMACNA

    In addition to the SMACNA requirements your project will be required to protect absorptive material from moisture through proper scheduling and storage. This includes drywall, carpet, ceiling tiles, and any other absorptive materials. Take pictures of this for documentation.

    If HVAC equipment will be used during construction, you will need to install MERV 8 filters before operating them and replace them before the building is occupied.

    Filter standards for international projects

    International projects can follow international filter standards if using HVAC equipment during construction:

    • Europe: Class F5 (defined by CEN Standard EN 779-2002)
    • East Asia: Medium Efficiency or High Efficiency (defined by Chinese Standard GB/T 14295-2008)
    • For all international projects: Minimum dust stop efficiency of 30% and arrestance of 90% for particles between 3–10 picograms

    All other applicable SMACNA guidelines should be incorporated into the IAQ Management Plan.

     

Legend

  • Best Practices
  • Gotcha
  • Action Steps
  • Cost Tip

Construction Documents

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  • This credit relies heavily on SMACNA’s best-practice management guide that addresses construction IAQ management in five areas: HVAC protection, source control, pathway interruption, housekeeping, and scheduling. (See Resources.) Develop the project IAQ plan for use throughout construction. You can use the customizable IAQ plan provided by LEEDuser—see the Documentation Toolkit.


  • Poorly covered HVAC ductsWith all of the SMACNA guidelines, there is a right way to do it—and then there are the other ways, like this poorly covered ductwork. Do it right, and document it with photos. Photo – YRG SustainabilityYour project IAQ plan must address all five areas of the SMACNA guide, protection of absorptive materials, and use of MERV 8 filters (if applicable). Although you’re not required to employ every SMACNA guideline, it's a good idea to implement as many of the guidelines as possible unless you can reasonably justify not doing so. Projects that implement only a few SMACNA guidelines run the risk of having the credit rejected during LEED review. For example, it would be a red flag if your HVAC units arrived from the manufacturer wrapped in plastic, but you didn’t cover open-ended ducts to protect them once they were installed, or didn’t have any photos to back up the claim that ducts arrived wrapped.


  • The owner and design team need to ensure that IAQ guidelines, such as an IAQ plan, HVAC protection, source control, pathway interruption, housekeeping, and scheduling, have been integrated into the construction specifications.    


  • Masterspec offers sample LEED specifications for construction documents. It includes an entire section specific to IAQ management. (See Resources.) The contractor also needs to protect absorptive material from moisture. This is for both installed and stored absorptive materials, like drywall, carpet, and ceiling tiles. You should also take pictures of this for documentation. If HVAC equipment will be used during construction, you will need to install MERV 8 filters and replace them before the building is occupied.

     


  • Construction specifications can include IAQ-related items such as procedures to follow, a sample IAQ plan, and VOC limits on materials related to IEQc4: Low-Emitting Materials, no-smoking policies, the request to use dustless equipment, a request to have ductwork arrive pre-wrapped, and more.


  • Some contractors may charge a premium for implementing and documenting this credit, but in general, added costs should be minor as more firms start incorporating these as standard best practices. 


  • Hiring construction teams with LEED experience is helpful, as is reviewing LEED requirements and responsibilities with the contractor during the bidding process.


  • Accountability is key to successfully implementing an IAQ plan. Ensure that subcontractors are required implement their parts of the IAQ plan, and to get specific processes and materials approved. 

Construction

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  • Preparation Before Construction Begins


  • The general contractor (GC) should go over all LEED-specific issues—including IAQ management, the role of low-emitting materials, environmental materials tracking tools, construction waste management, and more—at an orientation meeting.


  • It’s a good idea for the GC to meet with subcontractors to reinforce the LEED responsibilities related specifically to their trades. This exercise helps to build trust and is crucial for obtaining buy-in from all participants in the process.


  • Give the GC and subcontractors the following tools to help them track materials data for all MR and IEQ credits. (See the Documentation Toolkit for access.)

    • Materials Calculator:  This is a master tracking spreadsheet that the GC can use internally to compile product information received from the subcontractors. The spreadsheet tracks LEED values across multiple LEED MR and IEQ credits.
    • Environmental Materials Reporting Form: This is a material tracking form that helps subcontractors record the environmental values for products they purchase. This can be distributed to each trade subcontractor and submitted to the GC for filing. 
    • Low-Emitting Materials Reporting Form: This is a VOC tracking sheet that helps subcontractors record the low-emitting qualities of the products they purchase and can be distributed to each trade subcontractor and submitted to the GC for filing.
    • Low-Emitting Material Limits: These tables, found with each credit here on LEEDuser, summarize the maximum VOC limits for different types of adhesives, sealants, paints, coatings, composite wood, and flooring products. When subcontractors search for low-emitting products, they should consult these charts.

  • Enabling coordination and communication among the GC, subcontractors, and the design team early in the process can minimize scheduling delays and pushback from subcontractors.


  • The GC distributes the Indoor Air Quality plan outlining procedures and best practices to be distributed to subcontractors prior to the construction phase. The plan should clearly identify who is responsible for implementing each component of the plan—for example, “Wrapping installed open-ended HVAC ductwork is the responsibility of the mechanical contractor,” and “Quality control is the responsibility of the general contractor.” 


  • Develop a checklist for weekly activities that lists SMACNA guidelines, protection of absorptive material, and use of MERV 8 filters along with related to-do items, such as taking photographs to document the IAQ strategies. It’s a convenient way to stay on top of required tasks, and the checklist can be used at weekly meetings and posted around the site. See the Documentation Toolkit for a sample checklist.


  • During Construction


  • The contractor and subs should ensure that SMACNA practices are being followed. Each of the five major SMACNA areas is addressed in detail below.  


  • Decide whether HVAC units will be used during construction. If so, ensure that MERV 8 filters have been purchased and are used throughout the site. Remember that any filters used during construction must be replaced prior to occupancy.


  • Post copies of the IAQ plan in various places around the construction site to ensure that the plan is being followed. Hang signs that remind subcontractors to follow IAQ practices such as covering exposed ductwork with plastic, wet mopping regularly, and using low-VOC products and other SMACNA practices. See the Documentation Toolkit for sample signage.


  • Assign an IAQ manager to assist the GC. This person can run spot-checks for SMACNA and other best-practice compliance.  


  • HVAC Protection


  • Follow SMACNA strategies for HVAC protection that are appropriate to your project. These include items such as the following:

    • Wrapped, stored ductworkThis ductwork was ordered wrapped, and was stored away from construction work until installation. Photo – YRG Sustainabilitywrapping ductwork and or ventilation equipment in plastic once it arrives on site;
    • ordering ductwork pre-wrapped in plastic before it is delivered to the site;
    • placing ductwork or ventilation equipment in a room away from construction work to protect it from dust until it is installed and covered;
    • covering exposed grilles with plastic once ductwork is installed;
    • and laying plastic over underfloor air systems to keep out construction debris.

  • Ordering ductwork pre-wrapped in plastic or having open grilles sealed once installed may add slightly to costs, but pre-wrapped ductwork, for example, makes HVAC protection easy to achieve.


  • Housekeeping


  • Follow SMACNA strategies for source control that are appropriate to your project. These include items such as the following.

    • For construction materials storage, do not use VOC controlThis project used low-emitting paints, sealants, and adhesives, and stored them in a closet to protect air quality. Photo – YRG Sustainabilitymechanical rooms or air-mixing rooms as many products give off gases that can be absorbed by other materials or could be distributed to other areas through the ventilation system.
    • Use only low-emitting adhesives; sealants; paints, coatings; flooring products; composite woods; and furniture, wall, and ceiling systems. 
    • When cleaning the construction space, use low-VOC cleaners.
    • Combustion-based construction equipment used in the interior of a building should be exhausted directly to the outside. Long-snake exhaust pipes can be attached to this type of equipment for easy exhausting out of windows.
    • When combustion-based, stand-alone heating units are used for supplemental heating during construction, it may be best to keep the heating units outdoors to exhaust and pump the heat to the indoors.

  • Using low-emitting materials helps projects gain the Low-Emitting Materials series of credits—IEQc4.1: Adhesive and Sealants, IEQc4.2: Paints and Coatings, IEQc4.3: Flooring Systems, and IEQc4.4: Composite Wood and Agrifiber Products.


  • Using low-VOC construction materials and cleaning products helps to pass the air-quality test for IEQc3.2: Construction IAQ Management Plan Before Occupancy


  • Using low-VOC products—adhesives, sealants, paints, coatings, flooring systems, and composite wood—should add little to no extra cost. 


  • It is a good idea for the GC to set up a supervisory mechanism, such as designating an IAQ manager to run quality control checks and to ensure that the proper products and procedures are being used. 


  • The IAQ management plan should specifically state who is responsible for ensuring that low-VOC materials are used onsite, and the GC should verify that the products and procedures being used by each subcontractor are in compliance.


  • Follow SMACNA strategies for pathway interruption that are appropriate to your project. These include items such as the following:

    • Elevator shaftsThe base-building elevator shafts were sealed on this project to prevent movement of dust. Photo – YRG SustainabilityTemporary barriers and self-contained dustless apparatus, such as concrete grinders and drywall sanders, can be helpful to isolate and protect finished construction areas from areas that are still under construction. Isolate construction dust produced by activities like cutting drywall or wood. 
    • Separate construction zones from occupied zones.

  • Contain construction air pollution by exhausting air to create negative pressure in construction areas. 


  • Plastic barriers are the most inexpensive, but drywall or cloth partitions can be used as well.


  • Follow SMACNA strategies for housekeeping that are appropriate to your project. These include items such as the following:

    • Wet moppingWet mopping on a daily basis during construction keeps down dust. Photo – YRG SustainabilityWet mopping helps keep construction dust particles from becoming airborne.
    • Frequent sweeping helps control construction dust and keeps construction materials free of debris.

  • Housekeeping is a no- to low-cost measure and is simple to implement.  


  • These practices may be slightly time-consuming, but will help to create a healthier working environment for all the construction workers onsite on a daily basis. Communicating this point frequently to everyone on the site can help to build compliance. 


  • Scheduling


  • Carefully schedule construction and any necessary occupant moves in a manner that reduces occupant exposure to construction pollution. 


  • Carefully examine the sequencing of material installation before construction begins.  Schedule installation to protect absorptive materials from construction pollution. For example, do not store or install acoustic ceiling tiles before painting occurs or flooring products are installed because the ceiling tiles will absorb the off-gassing paint or floor adhesives and will contaminate the air over a longer time period. This could also compromise the project’s ability to attain IEQc3.2: Construction IAQ Management Plan—Before Occupancy. 


  • Scheduling is a no-cost measure but needs to be coordinated before construction begins.


  • Wrap-Up and Documentation


  • Take photos throughout the construction process to demonstrate that your IAQ plan has been followed. There is no specific number of photos required, but they must be taken at two or more different stages of the project. For reference, prior to 2009 this credit required at least 16 photos—see the Documentation Toolkit for examples.


  • All five SMACNA control measures have to be documented in a photo log. It is easy to take pictures of covered ducts, but don’t forget to also take photos of more process-oriented strategies such as housekeeping and pathway interruption. The pictures should clearly show all the control measures adopted during construction. Photos should be submitted with a brief description, the time and date, and an indication of what SMACNA practice is demonstrated. 


  • MERV 8 filtersThese MERV 8 filters were installed prior to initial system start-up, and replaced prior to occupancy. Photo – YRG SustainabilityIf the building’s air handlers are used, replace all filters (MERV 8) required during construction with new filters—after construction and before occupants move into the space.


  • Replace construction filters with MERV 13 filters if the project is also attempting to earn credit for IEQc5: Indoor Environmental Pollutant Source Control.


  • It is usually a good idea to do a “mini air flush” (if your project is not attempting IEQc3.2) before occupancy to help remove any lingering VOCs from the construction process. This can be as simple as putting industrial sized fans in the window and pumping in fresh air overnight or running the HVAC exhaust on high for a few days. (See IEQc3.2: Construction Indoor Air Quality Plan—Before Occupancy if the team wants to do a full flush-out for an additional LEED point.)


  • Fill out the LEED Online form and upload the IAQ plan, photos with SMACNA descriptions, and cut sheets of MERV filters used onsite during construction, if air handlers were used.


  • Alternatives to installing MERV 8 filters include not using the building HVAC units, bringing in a stand-alone temporary system, or using natural ventilation.


  • Pathway Interruption


  • Source Control

Operations & Maintenance

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  • O&M staff can use the IAQ plan for future renovations.

  • USGBC

    Excerpted from LEED 2009 for Core and Shell Development

    IEQ Credit 3: Construction IAQ management plan - during construction

    Intent

    To reduce indoor air quality (IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors.) problems resulting from construction or renovation and promote the comfort and well-being of construction workers and building occupants.

    Requirements

    Develop and implement an IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. management plan for the construction and preoccupancy phases of the building as follows:

    • During construction, meet or exceed the recommended control measures of the Sheet Metal and Air Conditioning National Contractors Association (SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil.) IAQ Guidelines For Occupied Buildings Under Construction, 2nd Edition 2007, ANSI/ SMACNA 008-2008 (Chapter 3).
    • Protect stored on-site and installed absorptive materials from moisture damage.
    • If permanently installed air handlers are used during construction, filtration media must be used at each return air grille that meets one of the following criteria below. Replace all filtration media immediately prior to occupancy.
      • Filtration media with a minimum efficiency reporting value (MERVMinimum Efficiency Reporting Value (MERV) rating is an American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) measurement scale which rates the effectiveness of air filters. ) of 8 as determined by ASHRAE Standard 52.2-1999 (with errata but without addenda1)
      • Filtration media is Class F5 or higher, as defined by CEN Standard EN 779-2002, Particulate air filters for general ventilation, Determination of the filtration performance
      • [East Asia ACP: Construction IAQ Equivalent]
      • Filtration media with a minimum dust spot efficiency of 30% or higher and greater than 90% arrestance on a particle size of 3–10 µg

    Alternative Compliance Paths (ACPs)

    East Asia ACP: Construction IAQ Equivalent

    Projects in East Asia may use filtration media classified as medium efficiency (中效过滤器) or higher as defined by Chinese standard GB/T 14295-2008(空气过滤器).

    Potential Technologies & Strategies

    Adopt an IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. management plan to protect the heating, ventilation, and air conditioning (HVAC) system during construction, control pollutant sources, and interrupt contamination pathways. Sequence the installation of materials to avoid contamination of absorptive materials such as insulation, carpeting, ceiling tile and gypsum wallboard. Coordinate with IEQ Credit 5: Indoor Chemical & Pollutant Source Control to determine the appropriate specifications and schedules for filtration media.

    If possible, avoid using permanently installed air handlers for temporary heating/cooling during construction. Consult the LEED Reference Guide for Green Building Design and Construction, 2009 Edition for more detailed information on how to ensure the well-being of construction workers and building occupants if permanently installed air handlers must be used during construction.

    FOOTNOTES

    1. Project teams wishing to use ASHRAE approved addenda for the purposes of this credit may do so at their discretion. Addenda must be applied consistently across all LEED credits.

Technical Guides

IEQ Space Matrix - 2nd Edition

This updated version of the spreadsheet categories dozens of specific space types according to how they should be applied under various IEQ credits. This document is essential if you have questions about how various unique space types should be treated. Up to date, 2nd Edition.


U.S. EPA Controlling Pollutants and Sources

The EPA website provides information regarding typical sources of indoor and outdoor pollutants and methods for resolving indoor air quality concerns. Find detailed information on exhaust or spot ventilation practices during construction.


IEQ Space Matrix - 1st Ed.

This spreadsheet categories dozens of specific space types according to how they should be applied under various IEQ credits. This document is essential if you have questions about how various unique space types should be treated.  This is the 1st edition.

Publications

California Air Resources Board Indoor Air Pollution Report, July 2005

This report, released in July 2005, covers the significant health effects caused by indoor air pollution, including respiratory illness and disease, asthma attacks, cancer, and premature death. The report describes the health effects, sources, and concentrations of indoor air pollutants; existing regulations, guidelines, and practices for indoor air pollution; and ways to prevent and reduce indoor air pollution.


The State of Washington Program and IAQ Standards

This standard was the first state-initiated program to ensure the design of buildings with acceptable IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors..


Indoor Air Quality: A Facility Manager’s Guide, published by the Construction Technology Centre Atlantic

A comprehensive review of indoor air quality issues and solutions.

Organizations

Sheet Metal and Air Conditioning Contractors’ National Association, Inc. (SMACNA)

SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. is an international organization that developed guidelines for maintaining healthful indoor air quality during demolitions, renovations, and construction. The professional trade association publishes the referenced standard as well as Indoor Air Quality: A Systems Approach, a comprehensive document that covers air pollutant sources, control measures, IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. process management, quality control and documentation, interpersonal communication , sample projects, tables, references, resources, and checklists.


Masterspec

Masterspec offers guidance on how to write LEED specifications into construction documents. It includes an entire section specific to IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. management.

Construction IAQ Management Plan

The Indoor Air Quality Management Plan outlines procedures and best practices covering all five areas of SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. guidelines. Shown here is a template formatted with the sections the IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. plan should cover and giving guidance on how to customize the template to develop your own IAQ plan. Also shown here is a sample IAQ plan from a Harvard University project.

Weekly IAQ Checklist

A checklist like this can be used at regular meetings between the GCA General Contractor (GC) manages, coordinates, and oversees building construction; may perform some construction tasks; and is responsible for hiring and managing subcontractors. and subcontractors to ensure that IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. management plan measures are being followed.

IAQ Photo Documentation

All five SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. control measures have to be documented in a photo log. It is easy to take pictures of covered ducts, but don’t forget to also take photos of more process-oriented strategies such as housekeeping and pathway interruption. The pictures should clearly show all the control measures adopted during construction. Photos should be submitted with a brief description, the time and date, and an indication of what SMACNA practice is demonstrated.

Jobsite Signage

Use jobsite signage like this sample to remind contractors of SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. requirements for this credit.

Construction Submittal

HardhatDocumentation for this credit is part of the Construction Phase submittal.

LEED Online Forms: CS-2009 IEQ

Sample LEED Online forms for all rating systems and versions are available on the USGBC website.

38 Comments

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Ciaran McCabe METEC Consulting Engineers
Nov 08 2016
LEEDuser Member
718 Thumbs Up

SMACNA Ductwork Protection Guidelines

In order to qualify for this credit is it acceptable if the duct work is wrapped once it arrived on site OR should it arrive pre-wrapped. Is it acceptable if we wrap the duct work end in plastic in a designated clean part of the site upon arrival.

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Michelle Halle Stern LEED Fellow, The Green Facilitator Nov 08 2016 LEEDuser Expert 1502 Thumbs Up

Yes. That sounds like a thoughtful, conscientious plan. The intent is to prevent construction debris/dust from getting into ducts during construction activities. Describe your methodology in your IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. Management plan.

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Ian McCall Environmental Engineer
Jun 16 2015
Guest
1569 Thumbs Up

Plastic Sheeting to Protect Raised Technical Floor

Project Location: France

Hello,
The installation contractors state that on previous LEED projects they have placed down plastic sheeting down in order to protect the raised technical floor. Correct me if I am wrong but for me this is not a "requirement" in the SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. chapter 3 guidebook. This could be requirement if the HVAC system was in the flooring, but this is not the case).
1) Can someone confirm whether of not this is a requirement?
2) Before sealing the floor & installing the carpet does the SMACNA require that cleaning be done underneath the raised floor or is this just a good-practice?
Regards,
Ian

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Jan 19 2017 LEEDuser Moderator

Ian, these items sound like optional practices, not requirements.

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Gabriel Yurevich
Apr 28 2015
Guest
9 Thumbs Up

NO HVAC INSTALATION - C&S IEQ Credit 3.1

Project Location: Argentina

Hi everybody. We are in the design phase of a CS small building certification. In which we dont project any HVAC installaction in scope. How can we create a IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. management plan, without the HVAC installation?

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Jan 19 2017 LEEDuser Moderator

Gabriel, IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. management is more than just HVAC. We have a detailed checklist on this above in our premium guidance. I'd recommend reading it.

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SUMAC Inc. SUMAC
Jan 20 2015
Guest
252 Thumbs Up

Extraction Monoxide in Basement During Construction

Project Location: Peru

we have a project of 20 floors of offices; and has 10 parking basements by local regulations.
The design of parking in basements requires extraction monoxide.

Currently is under construction and has just completed the construction of all basements in the rest of the year the following 20 stories, will be built and the project ended.

Those responsible for the construction request know if its possible to start the extraction system monoxide to help ventilate the basement; and whether this activity would be against the fulfillment of credit IEQc3 or more important if part of the support to be performed for the credit IEQc3.

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Jan 19 2017 LEEDuser Moderator

It sounds like it could help fulfill the credit requirements, if I understand the question right.

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Adrian Arenas Architect, Sustainability Consultant, LEED AP BD + C, IBALCA Mar 17 2017 LEEDuser Member 50 Thumbs Up

This arises another question; My LEED project consists of two Office Buildings with a shared below grade level parking lot, levels 3 and 4 are exclusive for Office building users. Construction at this point has practically finished parking lots thus they are now closed and considered “interior spaces”. My question, does the IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. Plan (during construction IEQ c3.1) scope and activities include these parking areas for mi LEED project?

Or does it only apply for enclosed regularly occupied Office Space?

For the IEQ c4.1 I found this LEED interpretationLEED Interpretations are official answers to technical inquiries about implementing LEED on a project. They help people understand how their projects can meet LEED requirements and provide clarity on existing options. LEED Interpretations are to be used by any project certifying under an applicable rating system. All project teams are required to adhere to all LEED Interpretations posted before their registration date. This also applies to other addenda. Adherence to rulings posted after a project registers is optional, but strongly encouraged. LEED Interpretations are published in a searchable database at usgbc.org. which exempts these areas form complying with VOCA volatile organic compound (VOC) is a carbon compound that vaporizes (becomes a gas) at normal room temperatures. VOCs contribute to air pollution directly and through atmospheric photochemical reactions (excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides and carbonates, and ammonium carbonate) to produce secondary air pollutants, principally ozone and peroxyacetyl nitrate. limits.
http://www.usgbc.org/content/li-1767

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Andrew Ellsworth Ellsworth Building Portfolio Services
Dec 17 2014
Guest
346 Thumbs Up

Filter Replacement

Project Location: United States

BACKGROUND: We have a project that is an office building pursuing LEED-CS 2009 certification. The C&S was substantially complete within the last several weeks. The tenant fitouts for about 2/3 of the building will be complete in the next two months. The remaining areas are currently unleased.
THE QUESTION: Are we required to replace the temporary MERVMinimum Efficiency Reporting Value (MERV) rating is an American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) measurement scale which rates the effectiveness of air filters. -8 filters in the central AHUs (part of the C&S scope) with MERV-13 after substantial completion of the C&S scope, even though the building won't technically be occupied until the first tenant fitout is complete? The filters would likely get gummed up from construction dust and need to be replaced by the time occupants are actually in the building. However, we don't want to miss the window to replace the filters and potentially lose the credit for not doing it soon enough. Any guidance on this? Perhaps this query belongs in EQc5, but seems more appropriate here.

Thanks in advance for any guidance.

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Michelle Halle Stern LEED Fellow, The Green Facilitator Dec 18 2014 LEEDuser Expert 1502 Thumbs Up

You are correct that the intent is to replace filters after construction is completed. Since construction is actively happening on 2/3 of the tenant spaces, I would wait until they are finished. However with a core and shell project you need to pick a stop point, and you need to change filters while the core & shell team is still in control of the building, and engaged with the certification process. Regardless I would make this one of the last things you do before handing over the building.

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Sangmin An Building Energy Simulation Analyst SGS
Jul 19 2013
Guest
235 Thumbs Up

Scheduling of Building Flush out for LEED Core and Shell Project

Hello,
I have a few questions in connection with SCHEDULING of IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. Management Plan. In regards to IAQ management plan, scheduling content must be planed and implented throughout the construction and occupancy phase I guess.
Here is my question.

Do I need to consider Flush-Out plan for IAQ management plan even though we are not going to implement flush out or IAQ testing ?
As I know, Flush-out and IAQ testing include IEQ c3.2 BEFOR OCCUPANCY which is extraneous credit for LEED Core and Shell certification.

Thank you for your attention in this matter.

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Nov 04 2013 LEEDuser Moderator

Sangmin, for LEED-CS you do not need to consider flush out or testing—it's not in the credit or rating system scope.

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Deeta Bernstein Cotter Consulting, Inc.
Jul 17 2013
LEEDuser Member
35 Thumbs Up

ID credit for flushout under other rating systems guidelines?

Does anyone have experience documenting an ID credit in CS for flushout based on another rating system (CI for example)? Flushout would be just for built out 2 floors of a 5 story building.

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Jul 17 2013 LEEDuser Moderator

Deeta, I don't have experience with this, but I would be reluctant to attempt this. The IEQc3.2 credit that appears in other rating systems intentionally doesn't appear in CS, and this is an example of why—CS is a whole-building rating system, but the credit would only be applicable to 2 floors. I think if you could do it on 5 finished floors, that might work, but then you wouldn't be in the CS rating system, anyway.

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Deeta Bernstein Cotter Consulting, Inc. Jul 17 2013 LEEDuser Member 35 Thumbs Up

Thank you for your reply Tristan! The thinking was that since CI offers flushout for individual built out spaces, we could apply this to built out spaces and require as part of our Tenant Design and Construction guidelines.
We have other ID credit options which it sounds like we would be better off exploring, but still have flushout on our minds - the project was initially going to be NC, but owner scope reduction means CS is more appropriate, and leaves us with flushout intention but no avenue given CS rating system.
Thanks again!

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Michael E. Edmonds-Bauer Edmonds International
Apr 02 2013
Guest
3016 Thumbs Up

EXTRACTION DUCTS AND FANS

This might sound obvious, but we wanted to double check.

Regarding underground parking encloused parking (no natural ventilation at all), there always will be fans to "push" the air towards the extraction units.

Fans, in our point of view, need to be protected with plastic since they will be store on site and will for sure get covered with dust. We always require this protection.

But what about the extraction units and the ducts that take parking contaminated air outside? By contaminated air we mean air carrying CO2Carbon dioxide from vehicules. This extraction units and duct work never carry air that will be "breathed" by people. Our assumption is that these do not need to be plastic protected.

Are we correct?

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Nov 04 2013 LEEDuser Moderator

I don't know—what does SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. say on the matter? I would be relucant to exclude them, as allowing ducts to get dirty even if they are exhausting air just doesn't seem like great practice.

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Pedro Ribeiro Director of Sustainability Edifícios Saudáveis Consultores
Aug 03 2012
LEEDuser Member
1607 Thumbs Up

Tenant fit-out and C&S IEQ Credit 3

Requirements of C&S IEQ Credit 3 also apply to tenants fit-out ? I am working in a Shopping Center Certification Process where tenants will be responsible for the fit-out of their shops (including HVAC system), using their own design teams and contactors. Therefore, it will be difficult for the owner to obly and control the implementation of the IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. management plan inside tenants areas. How could we comply with this credit requirements ? Thanks a lot !

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Aug 31 2012 LEEDuser Moderator

Pedro, see CS Appendix 4 in the LEED BD&C Reference Guide—this answers your specific question, and is something you should famliarize yourself with for other credits.

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Pedro Ribeiro Director of Sustainability, Edifícios Saudáveis Consultores Sep 07 2012 LEEDuser Member 1607 Thumbs Up

Thanks a lot Tristan. My interpretation of Appendix 4 is that, if we implement the plan in the Core & Shell areas we will award 1 point. If we implement the plan in the Core & Shell AND tenant areas we will award 1 additional point due to Exemplary PerformanceIn LEED, certain credits have established thresholds beyond basic credit achievement. Meeting these thresholds can earn additional points through Innovation in Design (ID) or Innovation in Operations (IO) points. As a general rule of thumb, ID credits for exemplary performance are awarded for doubling the credit requirements and/or achieving the next incremental percentage threshold. However, this rule varies on a case by case basis, so check the credit requirements.. I am right ?

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Sep 08 2012 LEEDuser Moderator

Pedro, this is how I read the Reference Guide, yes.

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Gabriela Hernández Castillo Architect, LEED AP BD+C SYASA - México
Feb 15 2012
Guest
3157 Thumbs Up

Fan and Coil Units

Is there any MERVMinimum Efficiency Reporting Value (MERV) rating is an American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) measurement scale which rates the effectiveness of air filters. requirement for Fan and Coil unit? We are specifying for MERV 6 in fan and coil units and we would like to know if that would mean not achieving the credits requirements.

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Feb 21 2012 LEEDuser Moderator

David, if they're not air handliers than they don't have the MERVMinimum Efficiency Reporting Value (MERV) rating is an American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) measurement scale which rates the effectiveness of air filters. 8 requirement.

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Ciaran McCabe METEC Consulting Engineers Nov 20 2016 LEEDuser Member 718 Thumbs Up

If we are seeking LEED credit Indoor chemical and pollutant source control do we need to ensure that Fan Coil Units are installed with MERVMinimum Efficiency Reporting Value (MERV) rating is an American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) measurement scale which rates the effectiveness of air filters. 13 filtration. I didn't think so until I read http://www.usgbc.org/content/li-2045. Am I correct in saying that both the Fan Coil Units and the AHU1.Air-handling units (AHUs) are mechanical indirect heating, ventilating, or air-conditioning systems in which the air is treated or handled by equipment located outside the rooms served, usually at a central location, and conveyed to and from the rooms by a fan and a system of distributing ducts. (NEEB, 1997 edition) 2.A type of heating and/or cooling distribution equipment that channels warm or cool air to different parts of a building. This process of channeling the conditioned air often involves drawing air over heating or cooling coils and forcing it from a central location through ducts or air-handling units. Air-handling units are hidden in the walls or ceilings, where they use steam or hot water to heat, or chilled water to cool the air inside the ductwork.'s now need Merv 13 filtration ?

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Petr Lhoták Sustainability Consultant Skanska Czech Republic
Jan 20 2012
LEEDuser Member
2117 Thumbs Up

Epoxy flooring system and Indoor Air Quality

Hi everybody!
Do you have any experience or suggestions on how to deal with application of polyurethane / epoxy flooring system in underground garage floors in scope of IEQc3?
Is temporary sealing off of the area and preventing contaminated air from entering staircases and elevator shafts enough? Temporary ventilation does not seam to be feasible since it is in a grage and it is a low-VOCA volatile organic compound (VOC) is a carbon compound that vaporizes (becomes a gas) at normal room temperatures. VOCs contribute to air pollution directly and through atmospheric photochemical reactions (excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides and carbonates, and ammonium carbonate) to produce secondary air pollutants, principally ozone and peroxyacetyl nitrate. system.

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Feb 21 2012 LEEDuser Moderator

Petr, even if you seal off the space it seems like VOCs are likely to spread into the building without some kind of negative pressurization. I think you're on the right track, though.

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Petr Lhoták Sustainability Consultant, Skanska Czech Republic Apr 16 2012 LEEDuser Member 2117 Thumbs Up

Thank you, Tristan. At the end we ended up with a sort of temporary ventilation as it was required by application technology of the flooring system. Supprisingly, it was not smelly at all :-)

Petr

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Rubén M. R. Codirector CIVITA
Aug 12 2011
LEEDuser Member
1069 Thumbs Up

C&S building with partial occupancy during construction

Our 23-story building is about to start partial occupancy at floor 12th.

The building's AHU1.Air-handling units (AHUs) are mechanical indirect heating, ventilating, or air-conditioning systems in which the air is treated or handled by equipment located outside the rooms served, usually at a central location, and conveyed to and from the rooms by a fan and a system of distributing ducts. (NEEB, 1997 edition) 2.A type of heating and/or cooling distribution equipment that channels warm or cool air to different parts of a building. This process of channeling the conditioned air often involves drawing air over heating or cooling coils and forcing it from a central location through ducts or air-handling units. Air-handling units are hidden in the walls or ceilings, where they use steam or hot water to heat, or chilled water to cool the air inside the ductwork. will be controlled by a variable speed drive which will regulate automatically the air supply quantity that the building needs, through the manual opening or closure of the supply and return dampers at each floor.

The project team will designate a person responsible of maintaining the dampers closed, except at the occupied floors, so the HVAC system only functions at these floors.

Is this enough for complying with this credit? or are we required to install MERVMinimum Efficiency Reporting Value (MERV) rating is an American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) measurement scale which rates the effectiveness of air filters. 8 filters at each return air grille, even though they are not being used?

What if we document that the supply and return air ducts are sealed at all non-occupied floors? then can we skip the MERV 8 filters and use our normal MERV 13 filters at occupied floors? Or both sections (the occupied and the under-construction sections) need to have their MERV 8 filters and we have to replace all of them when all construction activities end?

In all cases, what will we need to document the compliance whit this credit?

Note: the construction team is already following SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. guidelines, and weekly photographs are being reported.

Thank you!

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Nov 20 2011 LEEDuser Moderator

My understanding is that if the grilles are sealed off then you do not need to use the MERVMinimum Efficiency Reporting Value (MERV) rating is an American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) measurement scale which rates the effectiveness of air filters. 8 filters or replace them at occupancy.

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BH .
Jul 12 2011
Guest
1185 Thumbs Up

Scheduling for CS

Dear all,

we are making Core Shell project. Is it necessary to take into consideration flush out procedure during preparation of IAQIndoor air quality: The quality and attributes of indoor air affecting the health and comfort building occupants. IAQ encompasses available fresh air, contaminant levels, acoustics and noise levels, lighting quality, and other factors. management plan in scheduling point?

If so, what are the relevant requirements?

Does contractor need to replace all filtration media just before occupancy when HVAC is not planned to be used during construction?

Any comments/suggestions will be appreciated.

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Nov 20 2011 LEEDuser Moderator

BH, a flush-out is not part of this credit for CS projects.

If HVAC is not used during construction, then there is not a requirement to replace filters.

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Gabriela Hernández Castillo Architect, LEED AP BD+C SYASA - México
Mar 03 2011
Guest
3157 Thumbs Up

How to deal with insecticide?

Our project is located at an area where COMEJEN is usual due to a very humid climate. COMEJEN is a sort of termite who lives in concrete cracks.

It has been suggested to use a insecticide that is sprayed on concrete to avoid this termite during construction. I have done a little bit of research about this insecticide and it is not harmful to people.

Will this somehow impact EQC3?

According to the standard practice it is not used on soil so it does not affect SSP1, and I'm trying to think if there is any other credit affected by using insecticide but I can't not identify any.

Any comments/suggestions will be appreciated.

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Mar 10 2011 LEEDuser Moderator

David, I would think this would not prevent you from earning IEQc3. I would review the SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. guidelines for any mention of this kind of thing, and if it's not mentioned, review them and extrapolate what a "best practice" would be for applying this chemical relative to the housekeeping, scheduling guidelines, etc. I would also consider a universal notificationUniversal notification means notifying building occupants not less than 72 hours before a pesticide is applied in a building or on surrounding grounds under normal conditions, and within 24 hours after application of a pesticide in emergency conditions. Use of a least toxic pesticide or self-contained nonrodent bait does not require universal notification; all other pesticide applications do. policy per Integrated Pest ManagementIntegrated pest management (IPM) is the coordinated use of knowledge about pests, the environment, and pest prevention and control methods to minimize pest infestation and damage by the most economical means while minimizing hazards to people, property, and the environment. (IPMIntegrated pest management (IPM) is the coordinated use of knowledge about pests, the environment, and pest prevention and control methods to minimize pest infestation and damage by the most economical means while minimizing hazards to people, property, and the environment.).

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Ghaith Moufarege
May 13 2010
LEEDuser Member
10185 Thumbs Up

Complying with ALL SMACNA guidelines?

Dear all,

I was wondering if ALL of the SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. recommended measures need to be implemented on site to get the credit? For example, the SMACNA paragraph on "Modifying Equipment Operation" states an option of switching from diesel to bottled gas equipment such as generators or fork lifts.
Is the contractor obliged to switch from Diesel to gas powered generators?
This is very hard sometimes to achieve in certain countries!

Many thanks,

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. May 13 2010 LEEDuser Moderator

George, please see the LEEDuser content above for discussion of the issue of following all or some of the SMACNAThe Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) is an international association of union contractors, in the United States, Canada, Australia, and Brazil. guidelines. You're not required to follow all the guidelines. I would simply be very careful about skipping them and only do it if you have a good reason, which it seems like you have in this case. Ultimately it's up to the reviewers to decide if you went farFloor-area ratio is the density of nonresidential land use, exclusive of parking, measured as the total nonresidential building floor area divided by the total buildable land area available for nonresidential structures. For example, on a site with 10,000 square feet (930 square meters) of buildable land area, an FAR of 1.0 would be 10,000 square feet (930 square meters) of building floor area. On the same site, an FAR of 1.5 would be 15,000 square feet (1395 square meters), an FAR of 2.0 would be 20,000 square feet (1860 square meters), and an FAR of 0.5 would be 5,000 square feet (465 square meters). enough.

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Ghaith Moufarege
Apr 27 2010
LEEDuser Member
10185 Thumbs Up

C&S IEQ Credit 3.1

Does the C&S IEQ Credit 3.1 (Construction IAQ Management PlanA construction IAQ management plan outlines measures to minimize contamination in a specific project building during construction and describes procedures to flush the building of contaminants prior to occupancy. - During Construction) apply to a building under construction with NO partial occupancy? The project is a mall with only construction workers present at the time of construction. Can I still apply this credit?
Thanks alot!

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Tristan Roberts LEED AP BD+C, Executive Editor – LEEDuser, BuildingGreen, Inc. Apr 27 2010 LEEDuser Moderator

Yes, George. The intent of IEQc3 is to have a construction IAQ management planA construction IAQ management plan outlines measures to minimize contamination in a specific project building during construction and describes procedures to flush the building of contaminants prior to occupancy. that both protects the health of construction workers, and that also prevents practices that could lead to poor indoor air quality for occupants.

Most LEED projects that apply for this credit are in the same situation as your project, with no partial occupancy during construction.

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