Running B Vent Through Wall

Minimum clearance between the vent and combustible materials is 3 inches for l vent and 1 inch for type b gas vent.

Running b vent through wall.

What to know before you install b vent furnace pipe. The first is to allow air into the drain line to replace the vacuum created by flowing. No a b vent pipe cannot be terminated horizontally. The installation was a 2 year old 80 efficiency gas boiler with an aftermarket sidewall vent assist fan up at ceiling level in the basement.

The b vent was routed to the exterior through the poured concrete foundation wall beneath the rear exterior deck and the total exterior length of the flue pipe run beneath the deck was about 10 12 with a 90 degree elbow in the run. Guide to direct vent or side wall vent chimneys flues. How to vent a drain out a side wall. L vent or b vent that extends through any story above that on which the connected appliance is located is to be provided with enclosures having a fire resistance rating equal to or greater than that of the floor or roof assemblies.

It is worth noting however that if a category 1 appliance is being vented it may be acceptable to vent it horizontally but only with a gas exhaust fan properly mounted to pull out the gas from the flue. Direct venting or side wall vent chimney and flue systems are a method of venting the exhaust gases from a heating appliance directly out through the side wall of a building while eliminating the need for a vertical chimney of any sort.