Question-and-Answer Resource for the Building Energy Modeling Community
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Hey Keigo, I usually create a "kitchen exhaust fan" zone, with virtual partitions, inside the kitchen zone. I include all of the kitchen equipment that is to be located under the hood in this zone and would apply the appropriate "fraction lost" for this equipment. For this application, I think the default 0.7 is ok (maybe more). I also include a zone level exhaust fan with setting to match the anticipated operation. Then I apply a MAU unit for this zone and give the supply air the same schedule as the zone exhaust fan.
The rest of the kitchen will still have loads and have air conditioning. I simply let the virtual partitions leak extra heat into the kitchen zone and let that unit pick up the load.
