Double Wall Water Heater Vent Pipe Clearance

Single wall gas water heater vent pipe connector cannot be installed closer than 6 from any combustible materials such as floor wall framing paper etc.

Double wall water heater vent pipe clearance. Each type of vent pipe has recommended clearances to combustible materials. Aluminum 020 inner wall galvanized 021 outer wall. Trim back the wood shift the vent or. 3 16 diameters feature twist lock fittings screws required for 14 and larger diameters.

Note some modern high efficiency water heater may have pvc vents. Such installation could create pyrophoric conditions and a fire hazard. Metal single wall generally requires 6 inches of clearance. Type b vents ceiling floor wall clearances b vent clearances to combustibles clearance distances for a b vent to combustible materials in floors walls ceilings attics roofs.

With a direct vent system air for combustion is drawn from a vent pipe that runs through an exterior wall or the roof. Furnace water heater vent pipe clearance double wall. An exception is made for non combustible walls such as solid masonry or concrete. 6 minimum clearance from single wall vent pipe or flue vent connector to any combustible material.

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. Typical listed and labeled double wall vent pipe clearance to combustible materials is one inch but you should always check before installation. Amerivent is a complete gas venting system from 3 to 30 pipe diameters in 7 different pipe lengths to single to multi appliance hook ups. Metal vents that are too close to wood or combustionable materials may cause the wood to burst into flames.

One of the fire safety features of double wall type b gas vent is that its outer wall insulated by the airspace beneath it requires only 1 clearance to combustible material in the structure. 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. This article series describes b vent metal chimneys used for gas fired appliances. Metal double wall b vent requires 1 inch minimum clearance.

We discuss fire safety fire clearances and other gas appliance venting details for b vent chimneys. For gas fired water heater vents. Direct vent water heaters. Round type b gas vent 18 3.

Clearances 1 clearance to combustibles in single and multi family dwellings. 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. Maximum horizontal section of the furnace water heater double wall vent pipe cannot be longer than 100 of the vertical vent pipe length. Transite generally requires 1 to 3 inches depending on various factors.

Water heater vent pipe clearances and restrictions.