Residential Units requirements Ashrae 62.1 2004

I see that on Table E2. there are exhaust requirements for the living room, kitchen and baths of a residential units, but what about supply OA air requirements? When I go to table 6-1 the is a ventilation requirement for bedroom and living room but it's not clear if its only applicable to hotel, motels, resorts, etc. Please note that our project is a multifamily complex with 72 residential units with living, dining, bedroom, kitchen, bathroom and balcony.

Thanks

Outside Air for Trash/recycle area and Teledata Ashrae 62.1 2004

Im a bit confused in regards to providing OA to a trash/recycle area and teledata area. What classification do they fall under in Ashrae 62.1 2004? Additionally, in our design they are being air conditioned by minisplits with no OA due to the fact that they are not regularly occupied. How should we approach this credit?

Thanks.

Ds values for summer/winter

I need some help and advice regarding the LEED EQP1 response to the reviewer’s comments.

REVIEWER’S COMMENT:

It is unclear how the percentage of design airflow at the condition analyzed (Ds) was determined for the project. The system level and ventilation zone values are reported as 1.0, which is unexpected for a variable volume system.

TECHNICAL ADVICE:
Provide additional information regarding the selection of Ds, revise the model, as necessary, to be consistent with the flow conditions for the worst case conditions analyzed (most likely heating mode), and confirm that the value for Ds is correct both at the zone level and at the system level. Note that if the weighted average value for Ds at the zone level is 0.3, the system level value would also be anticipated to be 0.3.

The reviewer’s comment regards using the correct values for Ds.
Ds is the percentage of total design airflow at condition analyzed. It appears that the reviewer’s comment assumed the use of a percentage less than 100% (or really a fraction less than 1.0) for the winter season when the air flow is less due to less need for cooling. The way our calculations are done is for a separate winter and summer spread sheet to show the outside air requirements, supply air, percentage of outside air, and Ds (percentage of supply air to maximum supply air). For example for 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.-A-1, COOLING EXCEL SPREAD SHEET FOR VAVVariable Air Volume (VAV) is an HVAC conservation feature that supplies varying quantities of conditioned (heated or cooled) air to different parts of a building according to the heating and cooling needs of those specific areas.-A-16
COOLING 735 CFM, 155 CFM OUTSIDE AIR (AHU VALUES 979 CFM O.A., 5,100 SUPPLY AIR. THIS GIVES O.A./S.A. = 0.19)
Ds = 1.0 since VAV-A-16 supplies 100% of the 735 cfm for cooling.
HEATING 275 CFM, 155 CFM OUTSIDE AIR (AHU VALUES 979 CFM O.A., 1,855 SUPPLY AIR. THIS GIVES O.A./S.A. = 0.53)
Ds = 1.0 since VAV-A-16 supplies 100% of the 275 cfm for heating.
As you can see, the outside air does not change.

The reviewer may not have known this and thought that the Ds for heating should be 275/735 = 0.37.
However, our calcs have 979/979 = Ds of 1.0 for summer cooling and 275/275 = Ds of 1.0 for winter heating

Does the following explanation address this comment sufficiently?

Each zone’s outside air rates were calculated for both summer (cooling) and winter (heating). This provided a different supply air quantity which was lower in the winter season. Also, the ratio of outside air to supply air was higher in the winter so that the requirements for outside air based on ASHRAE 62-99 are satisfied when the supply air quantities vary. The value for Ds of 1.0 for summer relates to the summer supply cfm. The value for Ds of 1.0 for winter relates to the winter supply air which is usually lower. Therefore, the Ds of 1.0 is reflective of the supply air cfm for that season.

Can I use ASHRAE 62MZCalculator 2007 instead of 2004?

Would they allow me to upload ASHRAE 62MZCalculator 2007 instead of the 2004 version?

IEQp1 Demand control ventilation

hi, please help me regarding this issue......

Project have DCV in some areas. Does, these areas should be included in the IEQp1 62MZ or in VRP calculations??. Project team fulfill the Min. OA requirement for other spaces which don't have DCV. There is only one rooftop unit.

Fresh Air Calculation Based On Critical Zone

Hi,
I am doing a project which is a office bldg. The system of the bldg is 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. with VSD for each conditioned zone. There is no MZ system. I submitted the fresh air calculation as per 62.1 for review.
Now reviewer has given a technical advice which is stated below-:
If the air distribution is through VAVVariable Air Volume (VAV) is an HVAC conservation feature that supplies varying quantities of conditioned (heated or cooled) air to different parts of a building according to the heating and cooling needs of those specific areas. system, then the fresh air calculation shall be based on Critical Zone (where Zp is high) at worst case condition (i.e. occupancy is at peak and heat gain is minimum – eg: meeting room in a winter season).
Kindly suggest me how to perform same?

Building Occupied before credit was met

A major renovation project was completed in 2008, and they have been in the building for 4 years. In working to certify the project it was realized that EQp1 was not met in the design. The owner is considering paying to have the system upgraded to meet the requirements. Can we still meet the requirements of this credit if they've been in the building for 4 years before the credit was met?

100% Natural Ventilation and Unconditioned Space

This project is a small, seasonally used facility. It is only in operation when the doors are open, and relies completely on natural ventilation when in operation. In terms of operable window/wall area and square footage, the facility meets the natural ventilation requirements. My question concerns section 4 of ASHRAE 62.1 2004 on regional and local air quality, and the subsequent documentation. In terms of regional air quality, the EPA has deemed my location as non-attainment for NAAQS for many years now. For local air quality, the conditions are relatively unfavorable with a very close highway and wind direction. My concern is that the project will not meet the intent of the prerequisite because of the quality of air being used for all ventilation. However, there are buildings in my area that have been certified and also use natural ventilation. It is stated that I must document section 4 of ASHRAE 62.1 2004, yet in all of my searching have yet to see anybody mention it. Is the documentation of regional and local air quality a required submittal for this prerequisite? Is it possible to meet the requirements of this prerequisite even if the regional and local air quality is undesirable?

100% OA

I am reviewing IEQp1 kitchen that feeds outside air from an 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. for 100% outside air. The AHU also conditioned only for this sector. The question is this: Due to having no return, What will be the efficiency Ez in the area?.

Computer Server Room Ventilation

We have a computer server room which has a recirculating heat pumpA type of heating and/or cooling equipment that draws heat into a building from outside and, during the cooling season, ejects heat from the building to the outside. Heat pumps are vapor-compression refrigeration systems whose indoor/outdoor coils are used reversibly as condensers or evaporators, depending on the need for heating or cooling. In the 2003 CBECS, specific information was collected on whether the heat pump system was a packaged unit, residential-type split system, or individual room heat pump, and whether the heat pump was air source, ground source, or water source. for cooling but does not have any outside air ventilation (by design). The LEED Reviewer commented "computer rooms that are occupied at least once daily for more than 15 minutes at a time are generally considerd regulary occupied spacesOccupied Spaces are defined as enclosed spaces that can accommodate human activities. Occupied spaces are further classified as regularly occupied or non-regularly occupied spaces based on the duration of the occupancy, individual or multi-occupant based on the quantity of occupants, and densely or non-densely occupied spaces based upon the concentration of occupants in the space.". Does anyone know where this time frame for occupancy come from or dealt with this requirement before?

Recent multi family residential review

We are working on a residential building with mechanically ventilated corridors and naturally ventilated dwelling units. Our approach for the mechanically ventilated portions was accepted, but we were denied this prerequisite based on our documentation for natural ventilation. We provided window-to-floor area calculations demonstrating compliance and calculations for naturally engineered cfm for the spaces that are not within 25 feet of operable windows. The LEED Reviewer denied us this credit based on the following, "However, no calculations have been provided to document that these spaces comply with the natural ventilation requirements … Please note that one of the two following calculations would be necessary to document compliance with ASHRAE 62.1 for the dwelling units with occupiable space that is more than twenty-five feet from the windows:
1. The project team may apply the VRP procedure only, rather than pursue any portion of the natural ventilation path, and supply ventilation air through the undercut door. The entire unit space and occupancy must be included and it would not matter if spaces were farther than 25 ft. from operable openings.
2. If submitting for engineered natural ventilation, demonstrate means of continuously delivering or inducing ventilation air to spaces outside 25 ft. (for example continuously operating exhaust/transfer fans) during the occupied periods."
This does not seem in line with our previous LEED reviews that have accepted naturally engineered ventilation induced from intermittent kitchen/bathroom exhaust and pressurized corridors. Has anyone else run into this problem or guidance for documentation moving forward?

ASHRAE 62.1 - 2004 Occupant Density

I am filling out a table similar to Table 1 in EQp1 to demonstrate our project's compliance with ASHRAE 62.1 -2004. I am realizing that our actual population numbers are different than what would be generated from the default occupant density. I am understanding from Note 4 in Table 6-1 of ASHRAE 62.1 - 2004 that I am allowed to use the actual population numbers instead of the default occupant density numbers. Is this correct?

LEED Facilitation for Cold Storage Facility

Hi,

We are going to setup a Cold Chain Facility (A Multipurpose Cold Storage) which is having
1. 5 Nos of cold chambers with total capacity of 2500 MT designed for a temperature range of 0 deg to 4 deg C to suit the requirement of variety of products.
2. 6 Nos. Deep Freeze Chambers each of 250 MT, 1 chambers of 500MT & 5 chambers of 100 MT. each thus totaling capacity of 2500 MT designed for storage of frozen foods at a temperature range of (-18) to (-)22 deg C.
3. 1 No. 1 No. Pre-cooling chamber of 5MT Capacity to Pre-cool the Fruits & Vegetables from 30 to 35 deg C to 2 Deg C in 6 hrs.
4)4 Nos. ripening chambers for uniform ripening of bananas, 10 MT each chamber.
5)It will have mechanized stacking arrangement, Ante Room, Loading / Unloading dock, Process hall, machine room, offices and toilets.
6)Other facilities like DG Sets, Water based fire fighting system, weighing machines and strapping machines are also included.

My question is whether cold storage facility (details mentioned above) has the possibility to get the LEED Certification? If yes which rating system will be applicable and please inform us the cold storage project which has certified earlier.
Your reply at the earliest will be highly appreciable.

Ventilation in rerigerated warehouse spaces

On a past LEED project, Version 2.2, it was interpreted that the refrigerated warehouse spaces (deemed a process load due to the nature ofthe facility), required ventilation because there were people working there throughout the day. Their main tasks were loading/unloading only, so it's doubtful that any one person spent a significant amount of time in the space itself.
Has anyone challenged the ventialtion requirement or was this original interpretation incorrect? What was the outcome? Given the delicate nature of maintaing low temperatures and a quality product, it seems that this process load should have been exempt from the 62.1 and 90.1 requirements. It should be noted that assocaited spaces within the warehouse such as offices, did meet the requirements of 62.1 and 90.1.

Building corridor

Hi,

A project having a corridor 34.4m long has an operable window (operable size 1.5m x 0.55m) at both ends; the project is naturally ventilated and must comply with ASHRAE 62.1 section 5.1. Does the corridor has to meet the 8m from the operable area requirement of the mentioned standard even if the window is from end to end? Thanks

Direct window opening

Can we use the gross area of an operable window (say 5.5' x 2.0') which can only be opened up to 30 degrees in the computation of natural ventilation compliance calculation? Or should we only use the effective opening since the window can't be fully opened?

LEED V 2.2 EQ Prereqisite 1 Min. IAQ Requirements -CO2 Sensors?

I am finishing up the requirements for LEED NC and am inqiring as to whether CO2Carbon dioxide sensors are required to meet this prerequisite? My Commissioning Agent feels it is a requirement and my HVAC contractor who has done several LEED projects said this has never been a requirment for V 2.2. I know it is a requirment for EQ c1, however, we are goig for that credit. Please calrify?

Humidity from boiler

Will using boiler or plant steam for humidification cause IEQp1 to be denied?

Natural ventilation for warehouse

Dear all,
I have a factory project, including sewing plant and warehouse for storage.
In sewing plant we use HVAC system and in warehouse we keep natural ventilation.
So, the question here is:
For sewing plant we will apply section 4-7 of ASHRAE 62.1
For warehouse we will apply paragraph 5.1 ASHRAE 62.1.
Is it right?
Since I saw in LEED template online, we just select 1 option either MEchanical or Natural.

Thanks.

Reuse of Existing Ductwork

We have a major renovation project and in a portion of the buidling we will be replacing rooftop units, but would like to re-use the existing ductwork. Is this allowed and how does it affect or not affect the compliance with Minimum 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. performance?