Minimum Gas Appliance Vent Clearance From Roof

Gas fireplace direct vent termination cap clearance distances clearances between the gas fireplace exhaust vent and other building components or features.

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

Common vent systems are prohibited. The minimum clearance to a perpendicular wall extending past the face of the fireplace is one inch 25 mm. They exhaust moist air to the outside. 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.