Double Wall Vent Pipe Clearance To Combustibles

This article series describes b vent metal chimneys used for gas fired appliances.

Double wall vent pipe clearance to combustibles.

Most of the double wall stove pipe allows for 6 clearance from wall combustibles and 8 from ceiling combustibles. Double walled or close clearance stove pipe is used to connect your stove to the chimney. B and l vents may be in accordance with the appliance and vent listing. Double wall uninsulated or b vent clearance to combustibles is typically 6 inches.

This system is ulc s641 certified. Maximum horizontal section of the furnace water heater double wall vent pipe cannot be longer than 100 of the vertical vent pipe length. Dvl pipe has a double wall interior and is a close clearance stovepipe designed especially for connecting woodstoves to the chimney. Using a heat shield on a single wall stovepipe allows you to reduce the clearances from 18 to 6 to the wall and 9 to the ceiling.

Double wall pipe should not be cut. Nh fire bear by private email 2016 07 26. Metal single wall generally requires 6 inches of clearance. Double wall stovepipe is used when you don t have 18 or more clearance from combustibles.

This website is audioeye enabled and is being optimized for accessibility. Early 1900 s to about 1975 it was used. Transite a whitish looking cementious pipe containing asbestos material. For example a single wall stove pipe requires 18 inches of clearance from ceilings or walls.

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. Typical listed and labeled double wall vent pipe clearance to combustible materials is one inch but you should always check before installation. When combining lengths remember to subtract 1 5 from each to account for overlap.

Each type of vent pipe has recommended clearances to combustible materials. Furnace water heater vent pipe clearance double wall. Depending on which kind of stove pipe you use single wall or double wall you must also account for proper clearances from combustibles. 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.

He installed a double walled pipe listed for 2 inch clearance and a non combustible heat shield for clearance reduction on the remaining single wall pipe located less than 18 inches from combustible ceiling. Double wall insulated clearance to combustibles should be 1 or 2 inches or as the appliance or vent listing allows.