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Minnesota Mechanical Code 1346.0501 <br /> Determine Makeup Air Requirements for the <br /> following: <br /> • Size of new house: . 2,000 sq. ft. (including basement) <br /> • Average ceiling height: 8 ft. <br /> • Number of bedrooms: 3 <br /> • Ventilation type: Heat recovery ventilator (HRV) <br /> • Type of gas water heater: 40,000 Btu/hr power vent • <br /> • Type of gas furnace: 60,000 Btu/hr direct vent <br /> • Type of gas fireplace : 30;000 Btu/hr dir.ect vent <br /> • Kitchen exhaust fan : 250 cfm (exhausts to the outside) <br /> • Next largest exhaust fan : 70 cfm <br />