Roof Clearance Exhaust B Vent Gas Water Heater

The difference is that a power vent water heater pulls in combustion air from the space around the appliance then uses a fan to propel the exhaust through the vent.

Roof clearance exhaust b vent gas water heater.

6 minimum clearance from single wall vent pipe or flue vent connector to any combustible material. Simply realign the seams and pull apart. For gas fired water heater vents. But the class b double wall exhaust vent is.

Note some modern high efficiency water heater may have pvc vents. Table of type b vent rooftop clearance requirements. New gas hot water heater is 5 taller than old of course the same size would be too easy flex water and gas lines no problem. Metal vents that are too close to wood or combustionable materials may cause the wood to burst into flames.

This type of pipe is called b vent. There is an 18 straight run no joints up into the attic and straight up through the roof. Snap lock pipe and fittings together or align the seams push together and twist at least 1 to lock. I need to remove 5.

Type b gas vent pipe has a smaller pipe inside a larger pipe also know as double wall pipe for insulation and safety. If you apply heat to a combustible material for some period. Vent caps 12 and smaller may terminate a distance above the roof if 8 feet or more away from a vertical surface as follows. Can it be cut.

In that installation separate intake and exhaust vent pipes are run between the water heater and interior wall and only the wall penetration and termination are concentric piping. This ensures the outside pipe is cooler than the inner pipe. Gas burning appliances vent pipes produce heat when discharging exhaust gases to exterior. Single wall vent pipes cannot pass through a ceiling floor firewall or wall.

The new and improved amerivent type b gas vent features a quick disconnect system. If you are using a b vent typically a double walled air insulated vent for gas appliances typically you ll see a fire clearance stamped right into the metal of the chimney stating 1 inch minimum clearance to combustibles as you ll see in this photo. This ensures the water heater can heat the vent pipe enough to get exhaust gasses to rise out of the house. Temperature of the vent pipe is transferred to the surrounding area and all the materials that are in the vent pipe vicinity.

Single wall vents should have a minimum of 6 inches of clearance and double wall sometimes called a b vent should have 1 inch minimum clearance. To ensure a secure fit push in the locking tab to lock the pipe together.