I have an energy rater telling me that the 2 car garages built today with 16' overhead doors and a 6" gas vent thru the ceiling have been tested and have less than .40 air changes per hour and that combustion air openings must be calculated per IFGC 304.5.1.
I know nothing about an air infiltration test, but is it possible that a 2 car garage of only about 4000cf of air space with a door to the house, a door to the outside, a 16' overhead door and a 6" diameter hole in the ceiling for gas ventilation could test that tight?
I know nothing about an air infiltration test, but is it possible that a 2 car garage of only about 4000cf of air space with a door to the house, a door to the outside, a 16' overhead door and a 6" diameter hole in the ceiling for gas ventilation could test that tight?