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. Gas fireplace direct vent termination cap clearance distances clearances between the gas fireplace exhaust vent and other building components or features. 3 chimney vent caps larger than 12 must be located at least 2 feet above the highest point and 2 feet higher than any portion of the building within a horizontal distance of 10 feet. They exhaust moist air to the outside.

Inspect the external vent cap on a regular basis to make sure that no debris is interfering with the air. 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. Number 2 is a vent for an exhaust fan like those found in bathrooms and laundry rooms.