Double Wall Gas Water Heater Vent Pipe

Single wall natural draft gas water heater vent pipe cannot be used in unheated areas like attic or garage even if only partially penetrating that space because such vent pipe installation will cause excessive condensation on vent pipe walls and compromise proper drafting double wall pipe b vent type is required.

Double wall gas water heater vent pipe.

Amerivent class b gas vent uses a double wall of metal pipe for insulation and safety. The outer pipe of corrosion resistant galvanized steel insures strength safety and durability. And is approved for such residential and commercial applications as category 1 water heaters boilers furnaces space heaters or wall heaters. Duravent 4 inch wall thimble with double wall construction and adjustable vent length from the fasnseal series.

Instead both systems typically expel exhaust through a pipe that runs outside through an exterior wall. Direct vent water heaters. The amerivent all metal double wall gas vent is listed as type b by underwriters laboratories inc. Venting pipe for water heaters bosch tankless waters heaters and gas boilers.

The inner pipe efficiently contains the warm flue gases. Ul approved type b gas vent products form a continuous passageway from an approved gas appliance to. Exhaust gases are vented outdoors through a separate vent duct or through a separate chamber of the same pipe this requires a double wall vent duct. Apollopex corrugated the 3 4 in.

The air space between the inner and outer pipes provides insulation to keep the flue gases on the rise. Duravent 4 inner diameter fasnseal w2 al29 4c special gas vent pipe double wall 3 5 ips drain fitting. Illustrations of proper gas fired water heater venting using type b double wall vent pipe through a roof above or through a chimney below include details for the flue vent connector such as the requirement of a minimum vent connector upwards slope of 1 4 per foot of horizontal run. The difference is that a power vent water heater pulls in combustion air from the space.

With a direct vent system air for combustion is drawn from a vent pipe that runs through an exterior wall or the roof. Each of these ameri vent gas pipes features rugged double wall construction with aluminum alloy 1100 3003 or 3105 inner pipe and corrosion resistant galvanized steel outer pipe.