I am working on a hotel project where the ground floor is entirely dedicated to a casino. This casino floor is served by 8 AHUs, all supplying 100% fresh air. These AHUs are equipped with heating and cooling capabilities to meet the space loads, and they include heat recovery wheels.
Is there a specific way to model such spaces according to LEED v4.1? If I model them using the usual approach (assigning System 7 or 8), the project appears less efficient than the baseline because the entire floor is supplied with 100% fresh air. Any guidance on how to address this in the energy model would be greatly appreciated.
Thanks in advance.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5928 thumbs up
February 20, 2025 - 9:48 am
It is not at all unusual for the comparison of air to water systems to show a negative savings. If the code requirement for OA is less than the proposed design you pay a penalty for that design decision as well. So I am not surprised. Did you look through the G3.1.1 exceptions? Any apply?
Kathy Collins, LEED AP , WELL AP
Director of SustainabilityNV5 INC
February 20, 2025 - 1:21 pm
Thank you, Marcus, for the quick reply. I reviewed the G3.1.1 exceptions, but unfortunately, none of them apply to my project.