Double Wall Water Heater Vent Pipe Clearance

Note some modern high efficiency water heater may have pvc vents.

Double wall water heater vent pipe clearance.

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. 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. 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. We discuss fire safety fire clearances and other gas appliance venting details for b vent chimneys.

Maximum horizontal section of the furnace water heater double wall vent pipe cannot be longer than 100 of the vertical vent pipe length. Trim back the wood shift the vent or. Single wall vent pipes cannot pass through a ceiling floor firewall or wall. Typical listed and labeled double wall vent pipe clearance to combustible materials is one inch but you should always check before installation.

6 minimum clearance from single wall vent pipe or flue vent connector to any combustible material. Transite generally requires 1 to 3 inches depending on various factors. Direct vent water heaters. This article series describes b vent metal chimneys used for gas fired appliances.

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. Metal vents that are too close to wood or combustionable materials may cause the wood to burst into flames. Furnace water heater vent pipe clearance double wall. Each type of vent pipe has recommended clearances to combustible materials.

Water heater vent pipe clearances and restrictions. Aluminum 020 inner wall galvanized 021 outer wall. Metal single wall generally requires 6 inches of clearance. 4 5 and 6 oval.

With a direct vent system air for combustion is drawn from a vent pipe that runs through an exterior wall or the roof. For gas fired water heater vents. 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. 3 16 diameters feature twist lock fittings screws required for 14 and larger diameters.

Metal double wall b vent requires 1 inch minimum 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. Clearances 1 clearance to combustibles in single and multi family dwellings. Such installation could create pyrophoric conditions and a fire hazard.

Diameters 3 30 round diameter.