Double Wall Vent Pipe Clearance To Combustibles

Typical listed and labeled double wall vent pipe clearance to combustible materials is one inch but you should always check before installation.

Double wall vent pipe clearance to combustibles.

B and l vents may be in accordance with the appliance and vent listing. Nh fire bear by private email 2016 07 26. Depending on which kind of stove pipe you use single wall or double wall you must also account for proper clearances from combustibles. 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.

Metal single wall generally requires 6 inches of clearance. Metal double wall b vent requires 1 inch minimum clearance. Early 1900 s to about 1975 it was used. 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.

Double wall uninsulated or b vent clearance to combustibles is typically 6 inches. Double wall insulated clearance to combustibles should be 1 or 2 inches or as the appliance or vent listing allows. Dvl pipe has a double wall interior and is a close clearance stovepipe designed especially for connecting woodstoves to the chimney. Furnace water heater vent pipe clearance double wall.

Transite a whitish looking cementious pipe containing asbestos material. Double walled or close clearance stove pipe is used to connect your stove to the chimney. Double wall stovepipe is used when you don t have 18 or more clearance from combustibles. 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.

This pipe has a clearance of only 6 to combustible materials and keeps flue gases warm for better draft. Double wall pipe should not be cut. This system is ulc s641 certified. This website is audioeye enabled and is being optimized for accessibility.

This article series describes b vent metal chimneys used for gas fired appliances. For example a single wall stove pipe requires 18 inches of clearance from ceilings or walls. 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.

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. When combining lengths remember to subtract 1 5 from each to account for overlap.