Our system was modeled with a baseline of System 5 - Package VAV w/ Reheat, and is one system per floor. We received review comments stating that we should be specifying System 7, based on project type, size and heat source. We felt the most appropriate System was 5 based on total size being smaller than the 150,000 SF, and less than 5 floors. The comment was that controls are based on the whole building cooling load vs the tenant cooling load.
This is a LEEDv4 ID&C application, and the entire airport is not being certified. This is a completely separate terminal (i.e., separately metered; separate return/exhaust; separation of security; separate group of individuals occupying the space.) We used Option 1: Whole Building Energy Simulation, and modeled the entire extent of the Interior enclosure. In order to take credit under Option 1, must we extend our analysis to include the "entire whole building", or can we be successful in our argument that this project's "whole building" analysis for its separate space aligns with System 5?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
July 10, 2018 - 10:15 am
The modeling protocol in CI projects is within the Reference Guide. As I recall it clearly states that the whole building should be used to determine the baseline system. For most CI projects this makes a great deal of sense.
This sounds like a separate building so I am not sure why it is a CI project and not an NC project. If it were NC you could use the system 5 but not in CI according to the letter of the law.