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It’s worth pursuing this straightforward credit
This credit is fairly straightforward: the existing building selected by your LEED-CI project will either have LEED certification or other green features in place, or it won’t. (If your project hasn’t yet selected a building, consider looking for a building that will perform well under this credit.)
It’s worth considering this credit, because in the best case (Option 1), you can earn five points just for locating in a building certified under another LEED rating system.
If that’s not your situation, you can earn 1–5 points through Option 2 by targeting items on a menu of 12 “paths,” each of which approximates a key LEED credit not otherwise covered under LEED-CI (see the credit language and Checklists tabs for more detail). You...
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93 Comments
Option 2 Path 4 Heat island Effect nonroof
so my CI LEED project boundary is half of one floor of an 8 story building, it's 14,000 square feet, and does include an exterior courtyard. I interpreted this SS1 credit to mean the conditions of the existing building- so I imagined that I would include the sidewalks and driveways near our building- our existing whole building site, the Reviewer says I must use the LEED CI project boundary....so does that mean that I can not seek this Option 2 Path 4 to claim that all pavement is shaded???? OR do I ONLY use the exterior portion of my actual LEED CI project?
SS c1 is looking at the building, which your space is in. So when you fill out the PI Forms you are asked to provided information about the project site are, if included in the projects (so you are using it get credits). You will have to provided the total area there. You will also need a site plan to show the boundary of the site, which you will be using to show compliance with that credit. So the reviewer is right by saying you must use the LEED CI project boundary. But you have two different once. Your space boundary and your site boundary.
What you should or should not include in the site boundary depend on ownership and actual use associated with your building.
So the reviewer is write (do you mean correct?) by saying you must use the LEED CI project boundary...
This issue is whether the SSc1 Options pertain to the base building's surrounding conditions or do they as my reviewer says only pertain to measures taken within the LEED CI Project Boundary?
SSc1 pertains to the building in which your project is located. However when you submit for review you will have to tell the reviewer in the PI Forms, what you consider as building site and therefore claim for the credit. You probably just submitted a floor plan highlighting the LEED project boundary. You will also need to submit a site plan highlighting the site boundary (under PIF), which you consider for your LEED project. That's like a second LEED boundary. You probably have enter 0 for building site in PI form. So that's why the reviewer says it's not in the LEED boundary.
Also claimed anything under SSc1 does not require you to have done work as part of the project.
Another issue I have come across is that you may have gotten a standard review comment, which just does not fit one to one to your project. If you still can figure out what's wrong, just email the reviewer through LEEDOnline and ask for clarification.
oh, I see what you mean in regards to the PI form. thank you. And thank you for clarifying- I thought this CI SSc1 pertained to the base building .....
Exemplary Performance, Option 2, Path 4 (Non-Roof)
This is a follow up to other 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. (EP) discussions that have occurred. I understand that an EP point can be earned under Path 12 of this credit. In addition, an different EP point can be earned under the Innovation in Design section, like any other credit. My specific question: I have a site which is 100% white concrete and earned EP for Heat Island, Non-Roof under the Core & Shell system. The Commercial Interiors language states that EP for Path 4 can be earned by using multiple compliance methods (structured parking, white materials, shaded pavement). It does not mention using 100% white materials. Can I submit an Innovation in Design credit for Exemplary Performance of SSc1, Option 2, Path 4 because the site is 100% light colored materials? Thanks.
I haven't had this situation before, but going by the official rules and language it's best if you submit it as ID. The reviewer will that either advise you to resubmit it under SSc1 path12 or deny it, which means you can use another ID approach to get that credit.
LEED EB as a LEED Building.. not yet certified.
Hi all,
We are in the process of selecting a building to put an interior fit up in. The building just registered for LEED EB gold. Now, even if the project loses a couple of points it will still be a LEED registered project.
What documentation do I need from the Base Building landlord as there will be no LEED certification document by the time our project is submitted.
Thanks,
Dennis.
Denise, I don't think you can use a LEED-registered building to earn this credit—it must be certified. You could delay your submission, or add this credit as an appeal later, or include a narrative justifying why you should be able to earn the credit, but with the latter strategy, there is no guarantee of success.
Project Boundary, Site Boundary and Building
We are working on a remodel project encompassing three distinct areas within one portion of a hospital and I am not confident with my understanding of the definitions of Project Boundary vs. Site Boundary vs. Building.
The hospital is comprised of a number of attached buildings on one city block and another block across a public street with the hospital's parking structure and support facilities. Based on the MPRs and Supplemental Guidance I understand the LEED Project Boundary as circumscribing the areas being affected by our project. It would also seem that the Site Boundary can include both blocks (allowing us to use the parking structure for Site Selection Path 4). Is this correct?
I am not clear on the definition of "Building". Would this just be the portion of the complex that houses the remodel areas? Would it be the entire aggregate of attached structures?
Max, from your description it sounds to me like you can include these in one LEED boundary, although I am a little doubtful when you describe the 'attached buildings"—how attached are they and are their systems integrated? I would say that including the support facilities across the street is congruent with the LEED MPR supplemental guidance on non-contiguous parcels. If the attached buildings have fairly distinct identities then it is likely they should be certified separately.
I agree with Tristan that the area across the street would be included if the support facilities are occupied, conditioned office or program areas that are being renovated as part of the CI work. Under NC we are asked to include all those areas that support the project, which is the " non contiguous parcel" section of the MPR Guidance.
With CI, it seems appropriate to exclude those support areas across the street if they are not being renovated as part of the CI work, and are part of the whole hospital support services such as mechanical and electrical rooms, storage, IT, parking etc. Does that describe your situation?
SSc1 Option L
Has anyone submitted an Option L credit that is in reference to LEED-EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems.? I have been audited on that one and I am being asked to resubmit with a LEED-EBOM letter template, but I find that the letter template asks for infomration that is so indept (re: LEED-EBOM) it does not seem relevant to a LEED-CI project. To be specific, I am going for a LEED-EBOM Sustainable Cleaning EQc3.1, 3.3, 3.4 credit. Please share your thoughts. Thanks.
We just submitted a project for review using EQ P3 Green cleaning policy. We did submit the credit template, but for the credits I understand you will have to provide your actual purchases of products and such. That is tricky if your building is just build.
I'll let you know what our reviewers say. The review is due 2nd week of November.
We got the credit approved after preliminary review. Note we submitted the green cleaning policy, the LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. credit template and also a list of products purchased for the already in place green cleaning program.
Exemplary Performance
Apologies if this has already been addressed, but I'm confused about how this works - if my project has already got 5 points in other Paths in this credit, can I get an additional (6th) point for 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. under Innovation in Design?
Thanks for your help,
Méabh
Yes, you can get EP points for overachieving one of the 5 points, which you already apply for under this credit. But you don't get the EP point for having one more of those paths.
For example your building is covered by 100% green roof and you have 4 other paths achieved, than you can get 5 points + 1 EP for the green roof. I hope that helps.
SS 1 Option 2 Path 9
I am having trouble filling out the LEED Online template for option 9. The site in which our project is located has an onsite tertiary treatmentTertiary treatment is the highest form of wastewater treatment and includes removal of organics, solids, and nutrients as well as biological or chemical polishing, generally to effluent limits of 10 mg/L biological oxygen demand (BOD) 5 and 10 mg/L total suspended solids (TSS). plant that treats all of the wastewater generated in the buildings. The template automatically brings the information for Occupancy anf Fixtures from PI Form 3 and since that data applies only to the project and not to the building as a whole, the quantity of treated water is much higher than the water generated by the project. Furthermore, since the buildings at the site are leased to diferent companies, we do not have information with regard to their fixtures and features. We are applying for Option 2 - at least 50% of wastewater is treated onsite to tertiary standards. How should we go about it?
If the forms aren't correctly you might want to contact LEED Online --> feedback, to check for updated pdf forms.
You situation however sounds like all waste water gets treated, so I would try do documents it under special circumstances. Show the drawings for the whole system for the building also showing that there is no waste water bypassing the system. The catch is that the quantity of water could still be higher then what the system can handle. In that case try to use occupancy data base on the default numbers for LEED Core&Shell (BD+C Guide appendix 4
Option 2. Path 5 Heat Island Effect-Roof
I wonder that white-colored painting on the roof is enough to get the point. Our LEED consultant reported like this so they classified this item as easy & cheap one.
I searched some local painting/coating products but SRIThe solar reflectance index (SRI) is a measure of a material's ability to reject solar heat, as shown by a small temperature rise. Standard black (reflectance 0.05, emittance 0.90) is 0 and standard white (reflectance 0.80, emittance 0.90) is 100. For example, a standard black surface has a temperature rise of 90_F (50_C) in full sun, and a standard white surface has a temperature rise of 14.6_F (8.1_C). Once the maximum temperature rise of a given material has been computed, the SRI can be calculated by interpolating between the values for white and black. Materials with the highest SRI values are the coolest choices for paving. Because of the way SRI is defined, particularly hot materials can even take slightly negative values, and particularly cool materials can even exceed 100. information was not presented on the product specification. That's why I concern USGBC does not accept it due to lack of product information though it is white-colored coating.
Please give me some advice on this.
Seung,
that might not be correct, by saying "white colored paint" can contribute meet the credit requirement.
Any white colored paint can only contribute point if the white paint has a tested SRIThe solar reflectance index (SRI) is a measure of a material's ability to reject solar heat, as shown by a small temperature rise. Standard black (reflectance 0.05, emittance 0.90) is 0 and standard white (reflectance 0.80, emittance 0.90) is 100. For example, a standard black surface has a temperature rise of 90_F (50_C) in full sun, and a standard white surface has a temperature rise of 14.6_F (8.1_C). Once the maximum temperature rise of a given material has been computed, the SRI can be calculated by interpolating between the values for white and black. Materials with the highest SRI values are the coolest choices for paving. Because of the way SRI is defined, particularly hot materials can even take slightly negative values, and particularly cool materials can even exceed 100. value as based on ASTMVoluntary standards development organization which creates source technical standards for materials, products, systems, and services E1980-01.
hope this help
Thanks, Jason!
One more quick question. Does the LEED require any designated labs for this test? Or just follow the ASTMVoluntary standards development organization which creates source technical standards for materials, products, systems, and services by the licensed labs?
Hi Seung,
Painting roof covering white is really interesting issue which might decrease costs for materials to achieve SSc7.2. Even if I have found a web site http://www.concretethinker.com/solutions/Heat-Island-Reduction.aspx showing values for acrylic paint I have many doubts about it. Please let us know if you will get any answer.
SSc1 Path 4 Heat Island Effect- Nonroof
To clarify:
1.) Can I use a combination of underground parking stalls AND light colored pavement (SRIThe solar reflectance index (SRI) is a measure of a material's ability to reject solar heat, as shown by a small temperature rise. Standard black (reflectance 0.05, emittance 0.90) is 0 and standard white (reflectance 0.80, emittance 0.90) is 100. For example, a standard black surface has a temperature rise of 90_F (50_C) in full sun, and a standard white surface has a temperature rise of 14.6_F (8.1_C). Once the maximum temperature rise of a given material has been computed, the SRI can be calculated by interpolating between the values for white and black. Materials with the highest SRI values are the coolest choices for paving. Because of the way SRI is defined, particularly hot materials can even take slightly negative values, and particularly cool materials can even exceed 100. - 35 typical new gray concrete) AND landscape (tree) shading to achieve this point?
2.) It looks like I cannot use the underground if I go with the option of Shading of Nonroof Impervious SurfacesSurfaces that promote runoff of precipitation volumes instead of infiltration into the subsurface. The imperviousness or degree of runoff potential can be estimated for different surface materials.
3.) The underground parking option requires 50% of all parking stalls for the site, HOWEVER, the other option states 30% of all impervious surfaces area. Please clarify.
Ideally, I would like to use the underground parking in combination with the landscape shading and SRI 29 rated hardscape for a total of 30%, but it seems to good to be true!
LEED CI eligibility
Hi,
The LEED CI reference guide (2009) mentions that a tenant who lease thier space and who do not occupy the entire building are only eligible.
I would like to know, If a tenant owns the space 'A' which has only 2 floors and would like to go for LEED for CI for both floors, which is an office space, is not eligible for LEED CI?
Kindly advice.
S, the tenant should be eligible for CI with this space. If you read the full rating system selection guide, I think it becomes clear.
Path 12 - more than one point possible
We're curious if the review teams have changed approach with this.
We've understood that Path 12 allowed up to one point for 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. of one of the other SSc1 Paths (1-11) as well as the opportunity to submit documentation drawn from other Rating Systems (and/or distinct "innovations") for additional points (up to the limit of 5 available in this credit). This means that more than one point can be achieved through Path 12.
The Ref Guide makes the restriction on Paths 1-11 exemplary performance to differentiate this approach from the intent to encourage accomplishment of environmental performance criteria drawn from other Rating Systems. We've understood that the spirit of the SSc1 credit is that if the building is LEED certified - it's worth all 5 points without need for documenting individual credits. If the building is not LEED certified, but one can show documentation of discrete LEED credits (such as those in Paths 1-11 and/or on the pre-approved list), then points are awarded accordingly.
We just got a review comment stating that a project may only receive a single Path 12 point no matter how many pre-approved, exemplary performance or innovative elements are documented for the whole building. If so, the LEEDuser page for this credit needs revision and the intent of the credit makes a bit less sense. Anyone else run into this challenge?
Jim, it was LEEDuser's understanding that more than one point can be earned under Path 12, under the circumstances you describe. However, I double-checked the credit language and Reference Guide, and it allows "1 point."
If a reviewer is holding you to one point, then we would defer to GBCI here. Have you had other reviews that went the other way?
Anyone else?
Tristan,
The RG clearly limits this credit to one point for "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." of the Path 1-11 elements. This is consistent with any other LEED credit that limits EP to a single additional point.
The RG is silent on, and seems to encourage, identifying performance criteria drawn from other LEED Rating Systems that are applicable to the whole building. The credit intent would thus be to allow up to five points within this credit that could be any combination of path 1-11 credits, a single EP point AND documentation of other Rating System credits (thus none of the dreaded "double-dipping"). This is apparently formalized with the USGBC's release and updates of the "pre-approved" credits for Path 12.
It's helpful to recall that Path 12 is the LEED 2009 description of LEED CI v2 SSc1 Option L. Option L allowed up to two separate awarded submittals (2 half points of the total 3 points available). We've gone through that on v2 projects. This was not enough in our opinion, but still allowed credit for both EP and something outside of the Paths A-K.
This is the first 2009 CI where we have a project that the owner is essentially in the process of an EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. effort, so has throughly completed a number of the pre-approved credits as well as attaining EP for a couple of the Path 1-11 items. We submitted EBOM EAc1 (Energy Star score is high 80's). Seems incredible that
this would have no place for recognition alongside the impressive water efficiency achieved pursuant to a whole building retrofit that was informed by the tenant improvement.
It would be inconsistent with the SSc1 credit intent to disallow recognition of clearly documented "pre-approved" elements of the credit. Very hard to explain to the client!
We're very interested both on others' experiences. If this is indeed a new limit adopted in CI 2009 that the LEEDuser community was not aware of, we propose informally prompting the SS TAGLEED Technical Advisory Group (TAG): Subcommittees that consist of industry experts who assist in developing credit interpretations and technical improvements to the LEED system. to rectify it so that things make more sense (a "grass roots action" if you will). Jenny? Katrina?
SS Credit 1, Option 2, Path 5 Heat Island Effect – Roof
I am working on a CI project. The project’s area is part of a large commercial facility which includes many other tenants. For the SS Credit 1 Option 2 Path 5 Heat Island EffectHeat island effect refers to the absorption of heat by hardscapes, such as dark, nonreflective pavement and buildings, and its radiation to surrounding areas. Particularly in urban areas, other sources may include vehicle exhaust, air-conditioners, and street equipment; reduced airflow from tall buildings and narrow streets exacerbates the effect. – Roof, should I include the whole building roof areaRoof area is the area of the uppermost surface of the building which covers enclosed Gross Floor Area, as measured when projected onto a flat, horizontal surface (i.e. as seen in Roof Plan view). ‘Roofs’, or portions of roofs, covering unenclosed areas (e.g. roofs over porches and open covered parking structures) are not included in the areas used to evaluate compliance with SSc7.2, though they may be applicable to SSc7.1. square footage, or only the area within my project boundary?
Augusto, Option 2 paths are intended to apply to the building as a whole, so yes, include the whole area.
Storm water- Quality control
If a project has rainwater recharge pits located throughout the site can the project consider this as an infilteration Basin as listed in BMPBest Management Practice s? since recharge pits filters the stormwater before recharging it into the ground can this be considered as an alternative for compliance to this credit? (the pavement area is impervious)
S, I would not say that these would be alternative compliance paths for this credit, but that they could directly contribute to compliance with SSc1, paths 2 and/or 3. You would need to do more research and run some calculations to see if they bring you into compliance with those paths.
Option 2, path 5 - existing white roof
Our project has a nice white roof that I know to be compliant when new. This one is not 12 years old. Is it enough to submit the confirming documentation as the building owner still has the shop drawing? Or, do we need to get the roof cleaned?
If the roof was compliant when new then it will comply with the requirement of the credit. The LEED online template does not ask project teams to upload a maintenance plan.
LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. requires project teams to verify they will clean the roof every two years to maintain good reflectance.
It is recommended to clean the roof regularly however LEED CI 2009 does not enforce this policy at this time.
Hope this helps!
CI 2009, SS Credit 1, Paths 7 and 8: Water Efficient Landscaping
Re: LEED CI 2009, SS Credit 1, Paths 7 and 8: Water Efficient Landscaping.
I am working on an interior renovation in a medical facility. There is no exterior site work in the project scope. The existing medical facility has native drought resistant landscaping. There is no landscape irrigation system in place at this facility. Can I claim the 4 points for paths 7 and 8 since no irrigation system is being used even though our project includes no site work? The template requires uploading a site plan, but on an interior renovation project we do not have one. I thought the intent of SS credit 1 is to select a building with green features already in place, so it seems like we would be eligible for this credit.
Terry, I think you have the right idea. It would make sense that you would need some kind of site documentation, however, even if it's outside your scope. Can it be provided by the owner?
SSc1 Option 2, Path 4: Heat IE-Nonroof - Parking Stall Calc.
The tenant is taking 19000 sf of a 100,000 sf existing building and making it CI. There are 60 underground parking stallas and about 200 outside (unshaded). The total number of stalls were put there to meet the needs of the whole building, therefore, how do document just the ones for this tenant are the covered ones? Can I just use the code requirement of approx. 79 stalls? Do I draw a boundary just around the stalls we need? That will hurt my Open Space and look like meandering. I will assume I will have to prove the tenant specific spots are underground via written documentation (Lease or letter from GSA). Your thoughts?
The SSc1 paths address the whole building performance, rather than a portion of the building or site that's designated to a particular tenant. In the reference guide it's a bit more explicit that we have to provide cover for 50% of *all* the building's parking spaces, so even if your LEED project boundary is the 19,000 sf tenant improvement for this credit we have to include all parking stalls and site hardscape associated with the building.
Option 2: Restrictions?
Our project has a campus designed for 5 buildings. One building and the entire site was built out and received LEED Certified in 2004. We are in the process of designing the second building, but the LEED Coordinator was told that credits earned under the original certification cannot be duplicated to earn points on this project. Has anyone heard this before? I cannot find this restriction anywhere and it just seems to be counterintuitive of the paths in Option 2. Thanks.
Christina, this is complicated question. Depending on the specifics and the credits, the advice you received may or may not be valid. I would recommend that you review the LEED Minimum Program Requirements supplemental guidance, and the 2010 Application Guide for campuses and multiple buildings. Post back here with questions/thoughts.
Also, how is it that you are applying LEED-CI to a whole building?
Option 1: Only LEED-CS?
I can't find official language further elaborating on what "flavors" of LEED Certified buildings qualify. Can a LEED-CI project going into a LEED-EB certified building earn this credit? Or does it only count for LEED-CI projects going into a LEED-CS building?
Hi Jeremy.
As long as you select a LEED Certified building to locate your tenant buildoutThe time at which all habitable buildings on the project are complete and ready for occupancy. you should be awarded five points for this credit. Since EB, NC, and CS certifications apply to the entire building (10% floor area exclusion available to EB) previous LEED EB, NC and CS would all be acceptable. Unless the EB certification occured more than five years ago and the building owner decided not to recertify.
Option 1. Project in a LEED C&S precertified building
We are trying to certify the interior of our office which is within a LEED precertified project. We will only get certification by the beginning of next year since the entire project is no yet complete.
Can we apply for this credit with option 1? or should we combine several paths to sum up the 5 points of the credit? Can we do that?
As long as the LEED-CS certification is in place by the time of your final LEED submission, you are fine with Option 1. Or, you could do Option 2 if you prefer.
Path 2 Stormwater Quantity Control
Our future building owner is considering to install stormwater collection tank. Therefore we're trying to recommend the owner to comply with the LEED requirement.
As this site's previous imperviousnessResistance to penetration by a liquid and is calculated as the percentage of area covered by a paving system that does not allow moisture to soak into the ground. is greater than 50%, the option 2 would be selected.
According to my calculation, 25% of volume to be reduced is around 600 m3/day.
Is there a calculation method of storm water tank capacity to meet this credit?
In addition, I have another quick question regarding 2 year-24 hour design storm.
I understand that this number is from regional statistical data.
I got the following number from the Meteorological Administration Office;
"In 2007 and 2008, the greatest precipitation of this region during 24 hour was 1355 mm in June."
Therefore I used 1355 mm/day as a 2 year-24 hour design storm to calculate the runoff volume and 25% stormwater volume to be reduced.
Is this correct?
First of all, please double check your math. 600 cubic meters per day is an awful lot of water to have to store, divert for an alternative use and/or infiltrate.
Sizing your storage facility will depend on several factors including how you intend to use the water and the frequency of your rain events. Once you know your daily usage demands I recommend talking with a civil engineer and/or storage tank vendor for sizing assistance.
Your approach to determining the 24 hour design storm looks correct, but please note that if this value is higher than the 10 year annual average (i.e. unusually high) you should use the 10 year annual average instead (per page 5 of the 2009 ID&C Reference Guide).
Path 12 Other quantifiable environmental performance
As I understand that 100% roof garden can achieve 1 point on Path 12.
How about 100% SRIThe solar reflectance index (SRI) is a measure of a material's ability to reject solar heat, as shown by a small temperature rise. Standard black (reflectance 0.05, emittance 0.90) is 0 and standard white (reflectance 0.80, emittance 0.90) is 100. For example, a standard black surface has a temperature rise of 90_F (50_C) in full sun, and a standard white surface has a temperature rise of 14.6_F (8.1_C). Once the maximum temperature rise of a given material has been computed, the SRI can be calculated by interpolating between the values for white and black. Materials with the highest SRI values are the coolest choices for paving. Because of the way SRI is defined, particularly hot materials can even take slightly negative values, and particularly cool materials can even exceed 100. roof coating then?
Only vegetated roof is acceptable?
The requirement given in the Reference Guide is specific about vegetated roofs. I think that if an SRIThe solar reflectance index (SRI) is a measure of a material's ability to reject solar heat, as shown by a small temperature rise. Standard black (reflectance 0.05, emittance 0.90) is 0 and standard white (reflectance 0.80, emittance 0.90) is 100. For example, a standard black surface has a temperature rise of 90_F (50_C) in full sun, and a standard white surface has a temperature rise of 14.6_F (8.1_C). Once the maximum temperature rise of a given material has been computed, the SRI can be calculated by interpolating between the values for white and black. Materials with the highest SRI values are the coolest choices for paving. Because of the way SRI is defined, particularly hot materials can even take slightly negative values, and particularly cool materials can even exceed 100. path were avaiable here, it would have been mentioned. I would think it is most likely not allowed.
SS1 Path 11 On-site Renewable Energy
The building we are outfitting has Solar PV on site, an estimated 17,800kWh annual production. Half of it feeds a DC power Hydrogen electrolyzer that is used within the building and the other half is tied to reduce the building loads. Do I only count the half that is tied to the building or can I use all the energy produced by these panels to achieve the 2.5% or 5%?
What is the hydrogen used for? Does it offset power use in the building, or does it go to another purpose? If the former, I think you could count if you can provide calculations showing how it offsets annual energy costs.
SSC1 path 9, Innovative waste water technology
I have chosen to use the Option 1 to document the credit, but the SSc1 template seems to be “WRONG” in the following areas:
1. On the template it says: “The baseline for WE Credit 2 is derived from the flush fixture water usage data provided in the WE Prerequisite 1. The WE Prerequisite 1 form must be completed before compliance with WE Credit 2 can be documented.” The following summary table is a linked submittal:
[There should be no WEc2 for CI projects.] and
2. The Flush Fixture Summary table here is linked directly from WEp1, which shows:
LEED flush fixture baseline annual volume: 50.11 kGal
Total calculated “flush fixture” water use annual volume, Performance case: 28.33 kGal
Percent reduction of water use in “flush fixtures”: 43.46%
[However, these number appear in the linked summary table is the calculation for water use reduction in "ALL" fixtures, instead of the calculations for only “Flush Fixtures”.]
Is this a possibly a technical mistake on the linked summary table? Or is it suppose to calculate water reduction in ALL fixtures to earn this credit??
The first thing to check when a LEED Online form appears wrong is whether it's in "Beta." If it is, then it's quite possible there are known issues with it, and that it has been fixed. Send a feedback note to GBCI to update it, and/or check the LEED Online homepage for release notes on forms.
I believe there are another mistake with this credit. Since through the paths we are analyzing the base building, and not only the CI project, to achieve this credit we have to use 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. data from the building where the CI is located, right? Although, once we have to fulfill PI F3 Form wich is linked to the WEc1Path9 Form, we can't use base buidling's FTE, but only Project's (CI) FTE. Does anyone else know how to solve this problem? Am I right, or for Path 9 I have to use Project's FTE? Thanks.
Your logic makes sense but I am not familiar with this particular form, Fabiano. If it's not working for you I would check that you have the most up-to-date form, and ask GBCI for help via "Feedback."
SS1 - Option 1 - certified building
has anyone had experience of achieving LEED CI SS1 via option 1 for the certified base building if the base building has been certified using some other recognised green building standard such as BREEAMBuilding Research Establishment Environmental Assessment Method, the first widely used green building rating system, developed in the U.K. in the early 1990s, currently used primarily in the U.K. and in Hong Kong. in the UK or Three Star in China rather than LEED. Do you know if the USGBC or GBCI will accept this?
thank you
I've asked around and haven't found anyone with experience in this situation.
While USGBC is working on "internationalizing" LEED to recognize regional equivalents of standards, they haven't publicly done this yet for this credit or any others. I think you could make a case for it (particularly if you can find third-party evidence, i.e. studies, showing equivalence) but I don't know if it would fly.
Default value for open grid paver.
Hi all,
i facing some difficulty to look for runoff coefficient value for open grid paver made locally here in Taiwan. Does LEED give any default value for open grid paver?
any advice will be appreciated.
thanks.
No, I don't think so. It can vary a lot between manufacturers.
50 % Pervious Pavement or Each Paver need to be 50% Pervious?
Hi,
when i look at SSC1 path 4, i keep asking the above question to myself,
therefore, which one is the correct defination for "2. indentify all hardscape surfaces that are open grid paving that is at least 50% pervious and sum the total area" - LEED CI V3 pg 23.
are we need to cover the parking area with 50% pervious paver at least 50% of the parking area? or covering the parking area with 50% of ANY pervious paver will be able to score 1 point?
any advice will be greatly appreciated.
The open-grid paving itself is defined as being 50% pervious.
You have to cover less than 50% of the site area with pervious pavers, and those pavers themselves must be at least 50% open.
SS credit 1: Option 2 path
Hi,
As part off a recent CI design review we have found a building where as part of the enticement for the tenant to move has offered to upgrade portions of the building and in particular add a CRRC cool roof and update the landscaping to drought tolerant and drip irrigationDrip irrigation delivers water at low pressure through buried mains and submains. From the submains, water is distributed to the soil through a network of perforated tubes or emitters. Drip irrigation is a high-efficiency type of microirrigation.. Because these are not currently part of the existing building would these measures be disallowed as part of the SS credit 1 Option 2 path? Is it firm policy to have the measures in place prior to tenant improvement work?
Thanks!
These measures would be allowed—as long as you can document them as part of your LEED-CI submission, that should be fine. I don't see a practical or other reason for why they should be in place before the tenant work begins. Do you?
That was my original premise but I since this is my first CI project I thought it would be prudent to check and see what other thought of the issue. I have every intention of meeting and tracking each credits complete requirement.
Thanks for the feedback. Sometimes the gray area in some of these LEED programs can be a little confusing.
Cheers.
Help With SS Credit 1 Option 2 Path 6
I am currently trying to get a lighting design to comply with SS Credit 1 Option 2 Path 6 and have a question. To get this credit there is a stipulation that the "After-hours override maybe provided by a manual or occupant-sensing device provided the override lasts no more than 30 minutes"
If i have a light fixture that falls under this credit and it is controlled by a occupancy sensor that turns on the lights after hours when someone eneters the room and then shuts off the lights 30 minutes after the occupant leaves I think would meet the credit criteria. However, a co-worker is trying to tell me that the light has to shut off after 30 minutes regardless if some one is in the room or not. So if it is after hours and a person enters the room the lights will go on but after 30 minutes they shut off ever if the person is still in there.
My Co-workers interpretation doesn't make a whole a lot of sense to me, has some one gotten this credit and can help me set my co-worker, or me, straight.
Thanks
Ben
Your fine. Your co-worker is being too literal in his reading of this. Think of manual override first. Turn the lights on and they have to have a timer or something to turn off after 30 minutes. If you need more light after that you push the button again and you get another 30 minutes. Now the occupancy sensor is like pushing the button for another 30 minutes everytime it sees your movement.
Also the Life Safety Code requires enough light (min 1 fc1. A footcandle (fc) is a measure of light falling on a given surface. One footcandle is defined as the quantity of light falling on a 1-square-foot area from a 1 candela light source at a distance of 1 foot (which equals 1 lumen per square foot). Footcandles can be measured both horizontally and vertically by a footcandle meter or light meter. 2. The non-metric measurement of lumens per square foot, one footcandle is the amount of light that is received one foot from a light source called a candela, which is based on the light output of a standardized candle. A common range for interior lighting is 10 to 100 footcandles, while exterior daytime levels can range from 100 to over 10,000 footcandles. Footcandles decrease with distance from the light source. The metric equivalent of a foot candle is 10.76 lux, or lumens per square meter.) for people to get out of the building any time it's occupied. Having lights shut off after 30 minutes regardless of people still being in the building would violate the law if it leaves the space in darkness.
I have been getting some really dumb responses from LEED reviewers lately. It would not surprise me if one tried to enforce it as your co-worker views it. The equipment and programming required to make this work is extensive. And then there's the whole Code violation thing.
I agree with Bill's comments. FYI - check with your Client to determine if the 30 minute override will be acceptable. (Some find this incredibly annoying.) For some business that often have after-hours employees, you may want to consider using motorized blackout shades on a timer for the offending light fixtures. FYI, I'm a lighting designer and have met the credit this way on previous projects.
Can I ask for a clarification to Option 2 Path 6? Is this a requirement for the tenant space only or the total building. I am not sure because this is in the Sustainable Site area.
Thanks.
It's the building, not just the project space, which you have to apply this to.
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