I thought I recalled reading that the HVAC energy related to a commercial kitchen hood was considered Process Energy. Then I read on page 238 of LEED Reference Guide For Green Building Design and Construction 2009 Edition that "kitchen hood exhaust" IS considered regulated non-process energy. Is the makeup air unit considered process and the exhaust fan considered process? I thought the entire hood system was related to cooking, thus a process load. Am I correct?
Can someone please clarify for me what portions of a commercial kitchen are considered regulated (non-process) energy and what portions are considered non-regulated (process) energy? Thanks!
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
February 4, 2015 - 5:18 pm
I think I answered this a bit ago in one of these forums. As I recall when the hood is make up air and exhaust without any space conditioning then it is process. When the hood includes some space conditioning that serves the space surrounding the hood then it is not process.
Matt Scott
EngineerN.E. Fisher & Associates, Inc.
18 thumbs up
February 5, 2015 - 8:55 am
So even if the makeup air is heated, it's still considered Process Energy as long as that same air isn't being used to condition the space, correct?
I have a kitchen with a gas fired makeup air unit ducted directly to the exhaust hood, and also a separate heating/cooling split system ducted to the space.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
February 5, 2015 - 9:06 am
Correct.
Prescriptively in 90.1 (section 6.5.7.1) the make up air should only be tempered, not fully heated.
Matt Scott
EngineerN.E. Fisher & Associates, Inc.
18 thumbs up
February 5, 2015 - 9:18 am
Thank you.
Robin Dukelow
Sustainability Consultant; Project ManagerHenderson Engineers and Sustainable Design Consulting, LLC
11 thumbs up
November 11, 2019 - 6:47 pm
Hello, Is this still the case with LEEDv4?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
November 12, 2019 - 8:50 am
Have you noticed any change in 90.1-2010 that would lead you to think otherwise?