B Vent Through Roof

Page 1 installation instructions round and oval type b gasvent systems for use with natural as or liquid propane category i and draft hood equipped appliances and appliances listed to use type b gas vent.

B vent through roof.

Plumbing vent pipes are connected to your drain system and are needed for water to drain properly. Ul approved type b gas vent products form a continuous passageway from an approved gas appliance to the termination of the vent above the roof of the structure. Even using light weight b vent chimney sections the total weight of the chimney extending up through the roof will require support at one or more locations typically using a ceiling support attic support or roof support system provided by the manufacturer. Type b gas vent is designed for negative pressure applications and flue gas temperatures not exceeding 400 f above ambient for category i appliances.

It is of the utmost importance that type b gas vent be installed. Metal b vent chimney clearance distances above and on the roof. Additional fire blocking and shields are required at each of those passages. Vent pipes provide this air by running outside the structure of the house.

Clearance distances are given for a gas appliance b vent at the rooftop. Running a vent pipe out of the roof takes some careful preparation. For a perfect connection all of the vent connector components and flexible lengths feature the proven amerivent snap lock system of male and female connecting ends. All metal vents must terminate at least 2 feet above the roof surface and anything within 10 feet of the vent such as the crest of a roof ridge.

Firestops not installed at either the top or bottom side of the joist where the vent passes through floors or the roof. This article series describes b vent metal chimneys used for gas fired appliances. When water drains air must replace the space that was taken up by the water. Difficulty cleaning dryer vent.

Page 2 a major cause of vent related fires is failure to maintain required clearances air spaces to combustible materials. We discuss fire safety fire clearances and other gas appliance venting details for b vent chimneys. Dryer vents should always be vented through the side of the house and not vented through the roof and ideally the exit should be fairly close to the ground. Missing components such as a chimney cap.