Hello. I am working on a Shell and Core submission. The tenant requirement specifies a VRF system with an EER=3.45 for the proposed building. I am concerned that this is not enough information to qualify as a ‘HVAC system design’ according to Table G3.1.10. option 'b'. Can someone give me an idea of what minimum design detail is needed to follow this route?
For example, would a full example-design, with equipment selection for a typical floor be adequate to apply to the whole proppsed buidling model?
The alternative is to model the baseline building HVAC system (Table G3.1.10.d). We are trying to avoid this since the VRF system will probably be notably more efficient.
Thanks for helping.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5906 thumbs up
August 17, 2023 - 5:10 pm
You cannot get there through a tenant agreement since you must have an actual signed lease now to claim the savings. Actual completed design for an actual tenant is required. This is trying to prevent CS and CI projects from claiming the same savings for different scopes of work. A CS project is intended to capture CS savings not tenant improvement savings. So short of signed lease agreeemnts and atual space designs I am not sure how you would get there.
Glen Boldt
ZC Sustainability1 thumbs up
August 18, 2023 - 12:45 pm
This seems like an impossible situation. The signed lease requirement is difficult enough on a large building which will have many tenants, and typically won't be totaly leased out for a year or two. To get plans from each of those would take years after substantial completion of the CS building, long after there is anyone from the original team engaged. In addition, many tenants, especially in corporate retail, will not release that info on principle.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5906 thumbs up
August 18, 2023 - 1:34 pm
I think this is the whole point. There are differences between a CS, CI and NC scope of work and this requirement is just getting at the differences and not allowing savings to count across multiple scopes of work.
Eric Schlichting
3 thumbs up
August 18, 2023 - 1:37 pm
Hey Glen,
I feel your pain. I was in your situation several years ago. You may have seen my post on this forum describing a similar CS situation.
I learned about the signed tenant lease agreement requirement during my initial LEED review of my modeling. I originally submitted a copy of the owner's tenant guidelines and that was rejected by the LEED reviewer at the time. I did end up having to submit 10 separate signed tenant lease agreements with various sensitive corporate parts blacked out in my LEED resubmission.
As a result, there was a 2-3 year gap in time between my initial energy modeling review and my resubmission as I waited for the building tenants to populate the building. I actually resubmitted during the Construction Phase of the LEED process instead of during the Design Phase when I did my initial modeling submission. Therefore, I actually got assigned a different LEED reviewer between my submissions.
Here are takeaways I learned that will hopefully make a difficult situation easier.
In the end, it is all water under the bridge for me now. I was finally able to get the building in question certified but it took a long time (4 years on the LEED certification in my case). If I were you, I would work to start setting expectations with your team and the owner now given this situation.
I hope this helps.
André Harms
Ecolution Consulting1 thumbs up
August 29, 2023 - 3:07 am
Thanks everyone, for your guidance and comments. It has been most helpful.