Minimum Gas Appliance Vent Clearance From Roof

Venting systems vent connectors slope in ft upward to chimney vent not smaller than appliance flue up to 2 sizes larger than appliance flue length depends on type for single appliance single wall 75 of vent height b vent 100 of vent height 18 inch diameter for multiple appliances 34.

Minimum gas appliance vent clearance from roof.

This article gives typical clearance distance requirements between the termination cap of a gas fireplace or fireplace insert and other building or site features such as windows doors other mechanical system components air intakes. Each gas appliance must use a separate vent system. The minimum clearance to a perpendicular wall extending past the face of the fireplace is one inch 25 mm. Stack vents may give off sewer gas so they should not be located within 3 feet of an operable window.

Common vent systems are prohibited. Gas fireplace direct vent termination cap clearance distances clearances between the gas fireplace exhaust vent and other building components or features. Appliances designed for natural draft venting and incorporating integral venting means shall be located so that a minimum clearance of 9 inches 229 mm is maintained between vent terminals and from any openings through which combustion products enter the building. Inspect the external vent cap on a regular basis to make sure that no debris is interfering with the air.