Minimum Gas Appliance Vent Clearance From Roof

Stack vents may give off sewer gas so they should not be located within 3 feet of an operable window.

Minimum gas appliance vent clearance from roof.

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. Each gas appliance must use a separate vent system. Gas fireplace direct vent termination cap clearance distances clearances between the gas fireplace exhaust vent and other building components or features. 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.

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