What is the minimum distance the vent pipe of an LP Gas space heater should extend above the roof crest when installed within ten feet or less from the roof ridge?

The minimum distance that the vent pipe of an LP Gas space heater should extend above the roof crest when installed within ten feet of the roof ridge is 2 feet. This requirement is grounded in safety guidelines that aim to ensure proper venting and prevent the risk of combustion gases entering the living space or being trapped around the roof area, which could lead to hazardous conditions.

The 2-foot extension above the roof crest helps in creating an effective and safe venting system that allows for adequate exhaust release, taking into account possible wind patterns and other environmental factors that could affect the dispersion of gases. By maintaining this minimum height, the installation helps reduce the risk of backdraft or re-entrainment of gases which could pose a danger to occupants.