Buildings that provide views to the outdoors have proven to enhance productivity, testing performance, and overall occupant comfort and well-being. This credit is easy to achieve if you also plan to design for open space planning, placing 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. near exterior windows with large glazing areas and so that this is for more than just offices using furniture that does not block views from a seated position, such as low or transparent partitions between workstations.
If there is a standard design for every floor or standard spaces that are repeated throughout the design, the calculation may be easier as calculaitons can be repeated. Designing for compliance with this credit will likely be complementary with IEQc8.1: Daylight and Views—Daylight. Expect some tradeoffs associated with increasing window area, such as heat loss and gain through windows, increased glare, and privacy issues with open space planning and low furniture partitions.
The documentation for this credit does not involve complicated formulas, but the larger the project the more time-consuming the documentation will be, especially if spaces are varied.
Core and Shell buildings must demonstrate that they meet the credit requirements using a justifiable tenant layout and occupancy, which is to be consistent across all credits.
Analyze building orientation and site selection for opportunities to provide access to views to the outside.
Too much glazing, particularly east- and west-facing glazing exposed to low-angle morning and afternoon sun, may cause glare and overheating. Use overhangs, energy-efficient glazing, and daylighting designs that control glare, such as interior shades or lightshelves.
High performance glazing and increased glazing area may add additional costs unless they can be offset by integrated design solutions like right sizing of mechanical equipment, or in some cases the elimination of perimeter heating.
When selecting windows for maximizing views, consider also using operable windows for natural ventilation. This can contribute to credits IEQp1: Minimum Indoor Air Quality Performance and IEQc2: Increased Ventilation.
While LEED does not dictate the quality of the view outside the window, considering this can help a project achieve exemplary performance. Also, occupants will likely prefer view of interesting objects, views with movement (though not too busy), and views of nature. In other words, a view of a brick wall may meet the letter of the LEED requirement, but not the spirit.
Determine which spaces in a project are “regularly occupied” (per LEED definition) and need to be included in the views calculations.
Some spaces can be exempt from being considered “regularly occupied” due to the nature of their use. Previously published CIR’s offer some guidance. Provide a narrative explanation of why a given space should be exempt based on use of the space as views and daylight may negatively affect the use of the space, not the frequency or time that the space is actually used. For example, museum gallery spaces, high security and privacy areas, dark rooms for photo development, and others can all be exempt from the calculation.
The calculation of regularly occupied space can be fine-tuned as decisions for “fixed” (attached to a wall) counters with overhead cabinets and equipment are integrated into the design. The square footage where the cabinets and equipment are located is not considered occupiable space, and therefore is not included as part of the view or the daylight calculation. For example, if an office is 500 ft2 in total, but fixed counters and cabinets occupy 100 ft2, the regularly occupied space of the room is only 400 ft2.
Ensure that the spaces identified as “regularly occupied” are consistent across credits, especially for IEQc8.1: Daylighting and Views—Daylighting.
Enter the names of the regularly occupied spaces in the LEED credit form along with the total floor area for each regularly occupied space.
Hold an integrated design meeting with the architect, interior designers, mechanical engineer, lighting designer, contractor, cost estimator and the end user to explore and resolve possible benefits and tradeoffs that increased glazing and access to views strategies could have on daylight, glare, heat gain and loss, furniture design and layout, and other design decisions.
Place regularly occupied spaces such as offices, classrooms and conference rooms near exterior glazing and perimeter windows to increase opportunity for access to views and daylight.
When considering office space layout and workstations, consider partitions and moveable furniture that are equal to or less than 42 inches high on all sides or incorporate transparent surfaces in upper sections to allow access to views while seated.
Window-to-wall ratios may be fixed if your project is pursuing a prescriptive compliance path for EAp2: Minimum Energy Performance and EAc1: Optimize Energy Performance. These fixed ratios will impact access to views and glazing areas. Check the ASHRAE Advanced Energy Design Guide and the Advanced Buildings Core Performance Guide for required window-to-wall ratios. If a building envelope window-to-wall ratio is over 40% there will be a penalty in the energy model for EAc1. The same is true if skylight-to-roof ratio is more than 5%. These requirements are based on ASHRAE 90.1.
Explore a combination of strategies that increase views such as low-partition furniture, space-planning techniques, and interior glazing.
Identify available products and furniture that combine glazing and building elements for optimum access to views while maintaining privacy—for example, workstations with low partition heights and interior perimeter glazing.
By increasing glazing and designing for natural light, projects can reduce the number of ambient light fixtures or the frequency with which they are used, reducing the cost of electric lighting both upfront and for ongoing operations.
Ensure that glare controls are factored into the design of daylighting and views.
Calculate the floor area with direct-line-of-sight to perimeter vision glazing for each regularly occupied space. Moveable partitions must be included in your calculations.
Direct-line-of-sight is determined by visibility between the vision glazing (between 2’6” and 7’6” inches above the floor) without obstructions such as full-height partitions or solid doorways.
Direct-line-of-sight can pass through two interior glazing surfaces before reaching exterior glazing, but not through solid doors, walls, or partitions taller than 42”.
Create a floor plan showing areas with access to views as distinct from areas with no access to views.
Include more than one sight line if necessary to meet the requirement for all spaces.
Total the square footage with access to views and enter it in the LEED credit form.
Create a representative building section for each type of area included in the calculation.
For each section, draw a line originating from 42” above the floor (typical eye height) to the perimeter glazing demonstrating access to vision glazing and views to the outside.
Show typical furniture heights in the sections if applicable.
Total the areas of regularly occupied spaces that have both direct-line-of-sight to perimeter glazing and access to views while seated (at 42”). Divide this value by the total area of regularly occupied spaces to confirm if the design provides greater than 90% of occupied areas with access to views. This is done in the LEED credit form. Upload plans to LEED Online.
Private offices where more than 75% of the floor area has a direct-line-of-sight to views can include the entire square footage in the calculations.
For Core and Shell buildings, project teams must use a feasible tenant layout and plan to demonstrate that it meets the credit requirements. A consistent and appropriate occupancy must be used across credits.
Include columns as obstructions when calculating the access to views in open floor plans.
Excerpted from LEED 2009 for Core and Shell Development
To provide building occupants a connection to the outdoors through the introduction of daylight and views into the regularly occupied areas of the building.
Achieve a direct line of sight to the outdoor environment via vision glazing between 30 inches and 90 inches (between 0.8 meters and 2.3 meters) above the finish floor for building occupants in 90% of all regularly occupied areas. Determine the area with a direct line of sight by totaling the regularly occupied floor area that meets the following criteria:
The line of sight may be drawn through interior glazing. For private offices, the entire floor area of the office may be counted if 75% or more of the area has a direct line of sight to perimeter vision glazingThe approach used to determine the calculated area of regularly occupied areas with direct line of sight to perimeter vision glazing. The area determination includes full height partitions and other fixed construction prior to installation of furniture.. For multi-occupant spacesMulti-occupant spaces are places of egress, congregation, or where occupants pursue overlapping or collaborative tasks. Multi occupant spaces may be regularly or non-regularly occupied spaces., the actual floor area with a direct line of sight to perimeter vision glazing is counted.
The core and shell design must incorporate a feasible tenant layout(s) per the default occupancy counts (or some other justifiable occupancy count) that can be used in the analysis of this credit.
Design the space to maximize daylighting and view opportunities. Strategies to consider include lower partitions, interior shading devices, interior glazing and automatic photo-cell based controls.
This credit requires consideration of tenant design for views that can be implemented during future tenant build-out. Core and shell design documents should include drawings or specifications that detail the design assumptions and information on how the tenant can use this capability. If design and construction guidelines are created for tenants, this information should also be included in the guidelines.
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.
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.
This collection of papers on elements of biophilia includes consideration of daylighting's effects on people.
The Heschone Mahone Group Study "Windows and Offices: A Study of Office Worker Performance and the Indoor Environment" defines “View Factor” criteria related 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. compliance.
These samples of views documentation demonstrate how to sucessfully document access to views via plan drawing, section drawing, and spreadsheet. Depending on the rating system and version, not all of these may be required. Samples generously provided by LEEDuser guest expert Allison Beer McKenzie.
Sample LEED Online forms for all rating systems and versions are available on the USGBC website.
Documentation for this credit can be part of a Design Phase submittal.
I have done a view analyze of all the regularly occupied area of each floor of the project. As it is a glass curtain wall office building, 99% of regularly occupied area have access to views.
But I got a review technical advice like this:
It is unclear whether the analysis is based on the feasible tenant layout, as required. Provide revised plans and sections that are based on the feasible tenant layout to demonstrate that at least 90% of all regularly occupied seated spaces have direct line of sight views from 42 inches above the floor. Note that typically, office spaces include private offices, open offices, conference rooms, etc. Provide a revised form and calculations, as necessary.
As the project is applying LEED CS, specific tenant layout is supposed to be done by the tenants instead of the owner after tenant spaces are leased out.
1. Should I draw all the tenant spaces layout for tenants(with desks, chairs, partitions, even small rooms which might be added by tenant in their rent spaces)?
2. Can I meet the technical advice by adding room name(like office, conference room, private office, dining room) on the existing plan?
3. Can I meet the technical advice by adding tenant layout design advice addressing views(such as locate close spaces near core tube and use transparent partition, use low partitions which do not obstacle views in open workstation) in the Tenant Lease Agreement?
I would do just a simple open office layout, throw in some desks and work tables and label the spaces. When you start to put in enclosed office spaces you may raise the question with other credits about thermal and lighting controls. Tenant Lease Agreements are always a good thing but not needed.
The reviewer just wants to see that the shell of the building will provide the views to the occupants once occupied.
In the Views tab, I'm trying to add more rows but when I try to 'Unprotect Sheet' I get a password popup. How do I add rows in Views like I was able to in the Daylight tab?
Just hit OK and it should add a row. It will ask this each time you hit add a row. You can download the latest here, http://www.usgbc.org/resources/daylight-and-views-calculator-v2009
I am working on a mixed use CS building with a large retail area. The retail space in question has no access to views. However retail areas tend to be regularly occupied at the checkouts/teller stations, meanwhile the general retail floor area has infrequent staff and in my opinion does not constitute regularly occupied space.
Do you think that it is acceptable to create a feasible tenant layout which shows the checkout/teller stations as regularly occupied, meanwhile the remaining floor area is shown as non-regularly occupied?
The Regularly occupied Space Matrix dated April 2015 indicates that Merchandise Areas are considered regularly occupied. So the answer to your question is no. Both the teller area and retail merchandise must be considered regularly occupied.
I have a mixed use office building with the potential for restaurant tenants on the ground floor. There is sufficient exterior glazing for tenants to easily meet this credit if they use open kitchens. However, counters separating the dining area from the kitchen area might exceed 42" above finish floor for the line of site. The reference guide states "Design teams may want to use alternate view heights for areas with nontypical
functions." Since people in kitchen areas are typically standing while working and not sitting, can we use a standing height site line for people in those areas?
Yes, just provide a section showing the counters and throw in some human scale figure with the line of sight to the exterior glazing.
What angle are view lines drawn in plan? This particular project is a multi-story tower with curtain wall enclosure, only interrupted occasionally by a structural column with a projecting mullion cap extension. Thanks.
There is no angle used to how they are drawn. Start on the outside corner of one opening and extend it to the opposite interior corner of the same opening. Extend it into the interior. Refer to the reference guide for examples.
This project is a high rise mixed-use office building pursuing LEED Core & Shell certification with no or limited tenant build-out plans. For IEQ8.1 and 8.2, how do you: 1) calculate Window Area for continuous curtain wall for an open floor plan (no interior rooms) and 2) calculate the floor area (no interior rooms)? Is it from the perimeter curtain wall back to the core? Thanks.
The window area is the area of glazing between the frame that starts 30 inches above the floor to the head window head height.
The floor area is calculated from the window wall to the core.
Thanks Todd. For example, on an open floor plan with continuous glazing along the west façade, I would take the window height (30" above floor) x the length of the building and divide by the floor area which would be equal to the length of the building x the distance back to the core? Secondly, for 8.2: Views, I read in the forum I need to submit tenant plans, which I don't have for unleased floors. How should I manage that? If I don't have tenant plans for open floors, there appears to be 100% views. Please advise.
I assume you are attempting the prescriptive method? You are correct with how to calculate the window area. In regards to floor area: for each orientation, draw a line from the exterior corner of the building to the corner of the core dividing the floor plate into four parts. That polygon is the area to calculate your floor area for each orientation.
EQc8.2, you do not need to submit the actual tenant plans, just a proposed tenant layout. So based on the proposed occupancy number, put x amount of desks per floor. This would be calculated by the proposed occupancy divided by the number of floors.
We received comments back from our Design review that seem illogical to us; we're looking for some opinions/clarifications here.
We submitted representative (fabricated) typical, hypothetical office/retail floorplans for the tenant spaces in our CS project. The reviewers accepted EQ Cr 8.2, but had comments on other EQ Credits based on the layouts provided with EQ 8.2.
For example, for EQ Pre 1:
"Provide ventilation rate procedure calculations for the combined multiple ventilation system associated with 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.-1 and ERU-1 and AHU-2 and ERU-2 ensuring that the break out of spaces is consistent with Table IEQ-1 in IEQc8.2: Daylight and Views - Views."
Why would these need to be consistent if the layouts provided are just typical, fabricated possibilities for the purposes of the views credit? Our CS HVAC design is limited to the base buildingThe base building includes elements such as the structure, envelope, and building-level mechanical systems, such as central HVAC, etc. systems only, and does not include any possible tenant fit-out work.
Also, for EQ Cr 1:
"The plans provided in IEQc8.2: Daylight and Views - Views indicate that CO2Carbon dioxide sensors have not been installed within each densely occupied space (conference rooms, team rooms, etc.). Provide documentation confirming that all spaces with a design occupant density greater than or equal to 25 people per 1000 square feet are monitored by CO2 sensors, or provide tenant sales and/or lease agreement containing binding language specifying that tenants install CO2 sensors in all densely occupied spacesDensely occupied spaces are areas with a design occupant density of 25 people or more per 1,000 square feet (40 square feet or less per person).."
I see on the EQ Cr 1 page that "Installation of CO2 sensors in tenant spaces is not required during core and shell construction, and tenants are not required to install CO2 monitors; however, they should be made aware of the capability of the core and shell system to monitor CO2. The core and shell systems must be designed with the capacity for CO2 monitoring."
Our tenant agreement states (and plans concur) "the installed system in the base building is capable of being expanded to provide CO2 monitoring within the tenant spaces."
Can someone confirm how we should respond to this?
With the EQ 8.2 documentation already submitted, there was a narrative that clearly stated the layouts provided for that credit were purely hypothetical, solely for the purposes of EQ 8.2...
We're just not sure what the reviewers are expecting, or if anything related to EQ Cr 8 needs to change (even though it was accepted) based on the comments on the other credits.
My humble thoughts on this based on my general knowledge of LEED and not on the specific EQ credits are that they want to know that all of the EQ credits are achievable simultaneously via at least one hypothetical layout. In other words, they don't want to give you points for all credits if it means that the tenant would need hypothetical option A for the views credit, but then would need to rearrange everything to hypothetical option B to get the EQ Cr 1 credit. Does that make sense?
It sounds like in EQ Cr 1, they want a stronger legal commitment by the tenants to include the CO2Carbon dioxide sensors. From what I read here, it sounds like the tenant agreement only requires them to be aware that the option is available.
For EQ Pre 1, I would do the calculations as they ask. If they don't comply, you either don't qualify for the credit or you'll have to put something in the tenant agreement that says that the tenant agrees to provide X amount of additional ventilation in their build-out.
You may get more support for these credits in their respective areas on LEEDuser.
I'll expand a little further on what Jill started.
If you provide a tenant layout for one EQ credit, then the reviewers will use that layout to justify compliance for all EQ credits. If you were not to provide a tenant layout, then there are other ways that reviewer will determine compliance for EQp1. So your system will need to comply with the proposed layout. It is something that is consistently done with the reviewers in regards to CS project.
EQc1, you must have in the tenant lease agreement that sensors will be installed. It is mandatory that the language in the agreement or lease states that they must be installed. If the language just informs the tenant that they can be installed if desired does not confirm that they will go in the space and therefore, the requirements of the credit may or may not be met.
Look at Appendix 4 at the case studies for a guide as to what is and is not required and how to document the different scenarios.
Hope this helps.
So, to clarify for me, let me see if I can summarize/restate to make sure I understand...b/c right now I don't entirely understand.
1 - Even though the credit language states "tenants are not required to install CO2Carbon dioxide monitors; however, they should be made aware of the capability of the core and shell system to monitor CO2," we do actually have to require them to install the sensors in the lease agreement...right? (I can post this specific part in the EQ Cr 1 forum, too, if that's more appropriate; same for the EQ Pre 1 issue.)
2 - (This is the more confusing one) If our EQ credits are otherwise in compliance as-is, and all plans uploaded for the CS project for all credits are consistent with the CS project scope, as soon as we upload a hypothetical tenant layout as required by EQ 8.2, all other EQ credits must then be centered around a fake layout that we're forced to provide if we want the 8.2 point? That just seems illogical, and more like a trap. Did I misinterpret?
All of our EQ credits would be achievable based on the CS scope and the flexibility of the systems installed. Any potential tenant would have the ability to meet all CI credit requirements if they chose to do so.
If I've interpreted the above correctly, then it seems like we may need to abandon the 8.2 credit b/c of the way it is set up.
Look at Case C, page 620. I would also say that you should also post this in the appropriate credit forum too.
In regards to the layout, you don't have to have one, but you are still going to have to document how you determined your values. Again, these credits are not my specialty and I usually refer to the engineers in house, so I would definitely post this in the credit appropriate forum.
In a C&S building we suggest a Tenant fit out to comply with credit IEQ_c8.2, where we show meeting rooms, corridors and an office space layout resulting in a grater quantity of people of that responding to the "default occupancy". The questions are:
1. Do we have to consider this layout for the PIForms?
2. Do we have to consider this quantity of people for every other credit and prerequisite?, including de FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories.?
3. Do lighting savings have to account for the different spaces like corridors in the lighting power allowed calculations?
1.The proposed tenant layout would only be needed in the views credit. But it could also be uploaded in the PIF 4 as additional documentation.
2.FTEFull-time equivalent (FTE) represents a regular building occupant who spends 8 hours a day (40 hours a week) in the project building. Part-time or overtime occupants have FTE values based on their hours per day divided by 8 (or hours per week divided by 40). Transient Occupants can be reported as either daily totals or as part of the FTE. Residential occupancy should be estimated based on the number and size of units. Core and Shell projects should refer to the default occupancy table in the Reference Guide appendix. All occupant assumptions must be consistent across all credits in all categories. would be based on default values.
3. This one needs posted in the EA credits because I don't truly know the answer to this one.
Thank you Todd,
It´s great to read this, I was worried about other credits.
Regarding question #3, I have already done this and received a satisfactory answer too.
thank you again,
For Measure 4 of this credit, how do I determine if the View Factor is 3 or greater?
I would highly suggest reading Heschong and Mahones study: Windows and Offices;As study of the Office Worker Performance and the Indoor Environment. Read the section on view factors. This is also noted in the Reference Guide. If you still have questions after reading that post them here.
There is a link to this study in the Resources tab above.
Description: We have a core and shell project where part of the leasable area will be a car dealership. This area that will belong to the car dealership will have two main areas: offices and a car workshop (the place where they check cars for maintenance).
It is really clear that the offices area inside the car dealership are considered regularly occupied.
However we would like to know if the car workshop is also a regularly occupied space. We really need to know this because our car workshop due to the fact that will have lots of cars inside it need a really big area and for safety reason it has almost no windows.
The Regularly Occupied Space Matrix dated October 2013 indicates that workshops are considered regularly occupied spacesRegularly occupied spaces are areas where one or more individuals normally spend time (more than one hour per person per day on average) seated or standing as they work, study, or perform other focused activities inside a building.. I have seen car workshops at dealers with windows. The bayA bay is a component of a standard, rectilinear building design. It is the open area defined by a building element such as columns or a window. Typically, there are multiple identical bays in succession. garage doors are typically almost all glass, then a wall or two, usually at the ends of the bays has a bunch of windows. Those spaces will have to be included.
Thank you Todd,
About the Measure 1: "90% or more of regularly occupied spacesRegularly occupied spaces are areas where one or more individuals normally spend time (more than one hour per person per day on average) seated or standing as they work, study, or perform other focused activities inside a building. have multiple lines of sight, to vision glazing, in different directions at least 90 degrees apart"...
this "at least 90 degrees" should be drawning in top or section?
because its easy in top for our project, but in section is impossible.
The drawing should be done in plan. From the occupants location, draw a line to the center of each one of the views available to the occupant. The angle between the views must be at least 90 degrees. The occupant has to turn their head at least 90 degrees to see the other view.
When it comes to documenting 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. for this credit, and image is priceless. The credit can be deferred until construction so an image(s) can be taken to document the requirements. This method is very useful for the documenting the view factor. You could also use 3D modeling to do the same thing.
For projects outside USA
we want to know which is the measure called HEAD HEIGHT?
at which point starts and finishes at which point,
We have not found a definition or diagram in the Reference Guide
Head height is the measurement from the floor to the top of the window. If you need a more specific answer, I would say it is from the "finished" floor (the floor elevation that include the carpeting, tile, etc.) to the top of the glazed part of the window.
we have project with facade consisting of horizontal lamellas and glazing between them - like steps. The glazing is almost from a floor to ceilings. In a section view, the sitting person can look outside horizontally in the required level 42'' above floor but the horizontal lamellas (about 10'' thick) are blocking some parts of view between 30 - 90'' height. Is it necessary to have free view in the whole 30 - 90'' height from the floor?
Thank you for any comment.
I'm basing my comment on what I think you have based on your description. As long as there is not a horizontal lamella at exactly 42" you could earn the credit. The credit can be earned when using interior and exterior shading.
Do you have link to an image or could you email me a section?
Thank you for your comment. I am sending the scheme by e-mail (as soon as I find it :-))
Does anyone have recent experience with this credit (GBCIThe Green Building Certification Institute (GBCI) manages Leadership in Energy and Environmental Design (LEED) building certification and professional accreditation processes. It was established in 2008 with support from the U.S. Green Building Council (USGBC). review comments), as it relates to lease language? Lease language is not supposed to be required, but it seems like review comments have become more stringent in general.
Can you post what they are asking specifically asking for.
I don't have specific comments on this credit. I'm trying to anticipate whether or not lease language will be required. It's not supposed to be if we document a viable layout.
For this credit a tenant lease is not required. The requirement is providing a propose tenant layout to document credit compliance. You can be asked for tenant guidelines which show tenants how to maintain views designed into the space. Typically, if tenant guidelines or proposed lease agreement is requested in another credit, it will be blanketed across the other credits.
For a CS Project, the tentative floor layout for the office space has been designed. And following are my queries in respect to the direct line of sight which is a requirement for the IEQ 8.2 Daylight and Views-Views.
1. A private office of 13.54’ X 10.6’ has two windows proposed on the 13.56’ wall. One window is from 0.65’ (7.8”) to 2.62’ (31.44”) from the floor level whereas the other is 1.75’ (21”) to 3.72’ (44.64”) from floor level.
2. There are two Cafeterias with area of 660 Sq.Ft. and 980.8 Sq.Ft. while both the Cafeterias have windows from 3.93’ (47”) to 7.87’ (94”) above the floor finish level.
My query is, since most of the floor area is qualifying for the Plan Area of direct line of sight to Perimeter Vision GlazingThe approach used to determine the calculated area of regularly occupied areas with direct line of sight to perimeter vision glazing. The area determination includes full height partitions and other fixed construction prior to installation of furniture. and also we have the windows (as mentioned above) in between 30” to 90” without any obstruction, will this office and Cafeterias qualify for the horizontal viewThe approach used to confirm that the direct line of sight to perimeter vision glazing remains available from a seated position. It uses section drawings that include the installed furniture to make the determination. at 42”?
Only the one window in the office would provide views. Cannot say whether or not the space would be compliant because I don't have the width. The cafeteria has a view at 42" also.
How detailed does the tenant layout need to be? Is it (most simply) a layout of anticipated tenant areas, or (more difficult) the development of hypothetical tenant spaceTenant space is the area within the LEED project boundary. For more information on what can and must be in the LEED project boundary see the Minimum Program Requirements (MPRs) and LEED 2009 MPR Supplemental Guidance. Note: tenant space is the same as project space. interior layouts (to include offices, conference rooms, etc?).
Everyone that I have seen includes the open office space with some desks and works stations along with the enclosed offices and conference rooms, etc.
I would think that just highlighting an area on a floor plan and calling office may not be sufficient enough to show how views and even daylight could be potentially earned.
Is there a requirement for the depth of lines of sight to exterior glazing to be compliant with this credit? For example, we are currently working on an outdoor mall with several tenant spaces that only have windows at the front of the store, and some spaces are about 20 feet wide by 100 feet deep. Assuming they have an unobstructed view of storefront windows, can the lines of sight extend all the way to the back of the tenant space?
There is no maximum depth limit. As long as the views do not go through more than two layer of glass, you can go 200 feet.
when assuming glazed partitions in tenant spaces in order to comply with the credit. Does this condition of installing glazed partitions have to be included in the Tenant Lease Agreement? Credit IEQc8.2 is not listed in Appendix 4 of the Reference Guide. Or is this credit rather assessing potential to comply with the credit criteria?
Thanks for any kind of help.
So the space is initially designed to have the potential to earn the credit. Since the owner is not providing the fit out, then to maintain the views, the guidelines would need to be in tenant lease agreement, or tenant guidelines.
It is my understanding that you only need to provide a lay out that allows future tenant to achieve this credit, but it is not required to have a leasing agreement.
For a CS project, we will show a plan of a typical floor with the layout. However, in the Views calculation spreadsheet do we need to include all floors or is one floor sufficient ?
You need to include each floor on the spreadsheet so that values of the total square footage are consistent and the compliant percentage is accurately calculated . I would also include a narrative stating the floors are the same.
I want to know in the case that the building owner will rent all building offices, and design plans have a projected plant design free (without Closings) but the internal regulations of tenants has no restrictions to tenants if they incorporate Closings opaque internal (eg drywall walls) which vary the external view and the entry of natural light.
I wonder if for certification C & S only should be supported with the plans proposed project and is not responsible for such condition the future tenant inside his office.
No, in fact the opposite is true. To get the C&S views credit, the owner must have tenant restrictions in place that preserve occupant views.
I want to know if this restrictions what you talking about, must be in the form for this credits or should be in the TENANT GUIDELINES for credit SSc9.
because I check the form for the final review and dont see any option to put or specified this conditions of design, I just see the option to put the plans and photographs in the form for the final review.
It should be in the tenant guidelines as a requirement in order to get this credit. Whether you include it as such in the tenant guidelines for credit SSc9 or as a separate tenant guideline if you're not going for credit SSc9, is up to you.
Include the tenant guidelines in the file upload section (Upload IEQc8.1-2) even if you've already attached them to SSc9. It doesn't matter which option you choose when uploading a file like this as long as you alert the reviewer that these are included by checking the box next to "Special circumstances preclude..." A dialog box will open and you can enter text there.
I would like to know, if I can count the regularly occupied space looking to the inner courtyard?
I know it says "direct line of sight to the outdoor environment". But the courtyard is greened with a width of 30 meters.
Amra, if the inner courtyard is an outdoor space, then I would say you can count it, particularly given such a large width. If it is enclosed, then I would say not.
Our building has a TESCO store on the ground floor. Do we have to include the store into regularly occupied area? LEED reference guide says that regularly occupied areas should be just office, conference rooms, classrooms., core learning spacesCore learning spaces are spaces for educational activities where the primary functions are teaching and learning and where good speech communication is critical to a student's academic achievement. These spaces include, but are not limited to, classrooms, enclosed or open plan), instructional pods or activity areas, group instruction rooms, conference rooms, libraries, offices, speech clinics, offices used for educational purposes and music rooms for instruction, practice and performance. and cafeterias. That means that retail does not count?
Thank you for any advice.
No, retail counts. Those are just examples of spaces that do count. The list is not all-inclusive. You need to go by the definition of regularly occupied spacesRegularly occupied spaces are areas where one or more individuals normally spend time (more than one hour per person per day on average) seated or standing as they work, study, or perform other focused activities inside a building.. I would say that you could exclude stock rooms and storage rooms from the regularly occupied spaces, but otherwise rest of the area counts.
Hi, i'm working on a core and shell proyect particularly in 8.2 credit,and i have the next question about it, are cafeteria and file room a regularly occuped spaces??, and another question is , there is a difference between regularly occupied spacesRegularly occupied spaces are areas where one or more individuals normally spend time (more than one hour per person per day on average) seated or standing as they work, study, or perform other focused activities inside a building. and regularly occupied gross area? , i'm asking this because our proyect was reviewed already , and one of the technical advices given, was match the total regularly occupied gross area of PIf3 form with total regularly occupied spaces of IEQ 8.2 credit form. I'd not worked on this proyect before , and i'm trying to understand what the other people did.
#1 cafeteria is most definitely regularly occupied, the file room usually not. That's how we have submitted it in the past and it has been excepted.
#2 We had that a couple of times before. Actually the numbers from the PIF3 form are no longer linked with the IEQ 8.1 / 8.2 form in the newest version of those forms. Might be that this hasn't been updated for Core& Shell yet. I would just verbally explain that this numbers can not match. Because gross area means including walls. The definition for IEQ 8 applicable area excluded walls. So basically LEED online is wrong. You might also just changed the PIF3 form to the same number, which you are using in IEQ 8.2. At least that's what I was doing on in my last CS projects.
The area definition and cross relationship in LEED Online is an ongoing problem. The reviewers are devices to asked for clarification if the difference between gross area and occupied or "area per EA P2 in your simulation" is to large.
You might want to send the reviewer an email through LEED online to asked for some clear guidance on the issue.
Thanks Susann, i sent a "feedback" to leed on line. At the same time, i had another question with the regularly occuped spaces for IEQ c 8.2 form , the building has in each floor a central core and workstations around it , there are 6 floor in total and two of them has cafeteria and file room (my previous question), my doubt now is the corridors areas must be excluded from calculations of regularly occuped spaces? , basically this area is where the workers walk to the exit. I'm checking the leed user's glossary and corridors and lobbies are nonregularly 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., but if this area is not large and is the way to walk into the open office i don't know if it count as regularly occupied spaces.
If it's a corridor separated by full height walls, you will have to exclude it for sure. If it's a walkway in the open space than you can basically go either way. The determination of an area for this walkways is very arbitrary and therefore leave lots of room for discussions. We have done it either way included and excluded, what ever was the most likely layout.
I am working on a C&S building, it will be mainly occupied by offices and we have a proposed layout for those spaces. The ground floor is for retail,
do we need to prepare a layout for that space, even if we have no idea of what kind of business will it be? Does all the area count as regularly occupied?
There will also be a Gym on the first 3 floors, do we need to make a layout? Wich spaces count as regularly occupied?
You will need to show a proposed / potential tenant design. This doesn't have to be, what's actually been done in the space. But you will need it to determine compliance and what's regularly occupied or not. That's also the case for the retail area and the gym. Basically the whole building needs to have a potential tenant design. Keep in mind that it has to be consistent throughout the credits.
In the Reference Guide, under 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. for this credit, item #4 mentions a "view factor." What is that? I can't find an explanation of it in the Reference Guide or on LEED User.com.
The view factor is determined per the Heschong Mahone Group Study page 47 (see paragraph below #4 in the reference guide). You will also find the reference in the excel spread sheet (under resources) for documenting this credit on LEED online.
Susan, unfortunately, the link provided in the Reference Guide does not work and the reference has not been found on the Internet. Please provide the calculation or definition of view factor.
Suzanne, the link given in the Resources tab above works for me. Try again?
Thanks, Tristin. The link above does work. It's the link in the Reference Guide that is faulty.
I would like to confirm if in point 3 of 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. mean that within a distance of 3 x 42`` (typically) there will be no obstacles like glass walls, furnitures ect. between the desk and exterior view?
How should I understand "view factor", there is nothing about it in LEED Guide except this exemplary performance saying "with a factor of 3 or grater". How can I calculate it?
Designing for daylighting can also improve access to views.
Quality of views isn't an issue in this credit, but it is for occupants. Vegetated roofs can soften urban views.
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