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Whole House Fan vs Code Inspector ?

5 years ago

Our HVAC contractor says that the building inspector will require 1:1 Make Up Air for it. E.G., if we have 5k CFM of whole house exhaust fan then we'll need 5k CFM of MUA. Ridiculous.

Is anyone familiar with MUA exceptions for whole house fans? We've planned a lockout (through HA system) so that it can't be turned on unless x number of windows are open but HVAC guy says 'but what if the system is down or the fan accidentally comes on while all the windows are closed'.



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