I would like to make sure what does "dedicated/designated exhaust" mean. Can all hazardous gas and chemical use areas have one exhaust system combined with the exhaust from toilets or does every kind of spece (eg. copy rooms, janitor room) have to have a separate system and fan?
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Michelle Halle Stern
Senior Sustainability ConsultantGreenwood Consulting Group
120 thumbs up
February 8, 2016 - 10:22 am
Dylan should confirm, but yes you can combine the exhaust with toilets. I'm less certain about whether you can also combine one hazardous/chemical use with another.
Dylan Connelly
Mechanical EngineerIntegral Group
LEEDuser Expert
472 thumbs up
February 12, 2016 - 11:36 am
Yes you can combine the exhaust systems.
Lyle Axelarris
Building Enclosure ConsultantBPL Enclosure
60 thumbs up
July 20, 2016 - 5:39 pm
Similar question - does the exhaust need to run 24/7, or can it be shut down when the building is unoccupied to conserve energy?
Dylan Connelly
Mechanical EngineerIntegral Group
LEEDuser Expert
472 thumbs up
July 25, 2016 - 3:55 pm
Just during occupied hours. California's T24 says to start the building's ventilation (and exhaust) 1 hour before occupancy - LEED has no rules with this regard - just best practice.
Lyle Axelarris
Building Enclosure ConsultantBPL Enclosure
60 thumbs up
July 25, 2016 - 4:14 pm
Do you have any citations for this that I can use for reference in case I get a review comment about it? I have not seen an LI or CIR for it, but I always like to be certain before it's too late to make changes.
Thank you very much, Dylan.