Make up air strategy
This is for a home being constructed in zone 7/8 Colorado mountains. The home will be built with attention to air tightness and will be blower door tested, an ERV will be installed. Heating system will be a direct vented propane boiler with in floor radiant and an indirect water heater.
The house will have a 600 CFM range hood and two electric clothes dryers, these appliances will need make up air provided in order to operate correctly without depressurizing the house.
My idea is to install an electrically controlled make up air damper that supplies make up air into the mechanical room, from there I would run a duct that exhausts from the mechanical room into the laundry rooms or kitchen with a supply grill behind each dryer or the range. The reason for running the air through the mechanical room is to temper it.
-Is this a good strategy?
-Are there any code or safety issues with doing this?
-How is an electrically controlled make up damper actuated by 3 separate appliances?
-Would I be better off ducted directly to the supply grills without running through the mech room to temper?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part