B vent sizing chart B Vent Sizing Chart. Minimum height roof pitch feet meters flat to 7/12 1 0.30 over […]

Hoffman air vent chart Hoffman Air Vent Chart. Hoffman specialty air vents are float type automatic air vents that are […]

Ac vent temperature chart Ac Vent Temperature Chart. On the other extreme of 80° degrees fahrenheit ambient air temperature and […]

Gorton air vent chart Gorton Air Vent Chart. Venting capacity equal to that of 4 #1 gorton air eliminators. Use […]