Double Wall Vent Pipe Clearance To Combustibles

For example a single wall stove pipe requires 18 inches of clearance from ceilings or walls.

Double wall vent pipe clearance to combustibles.

Furnace water heater vent pipe clearance double wall. Transite a whitish looking cementious pipe containing asbestos material. Maximum horizontal section of the furnace water heater double wall vent pipe cannot be longer than 100 of the vertical vent pipe length. 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.

Double wall insulated clearance to combustibles should be 1 or 2 inches or as the appliance or vent listing allows. Double wall pipe should not be cut. Typical listed and labeled double wall vent pipe clearance to combustible materials is one inch but you should always check before installation. Nh fire bear by private email 2016 07 26.

This website is audioeye enabled and is being optimized for accessibility. We discuss fire safety fire clearances and other gas appliance venting details for b vent chimneys. This pipe has a clearance of only 6 to combustible materials and keeps flue gases warm for better draft. Depending on which kind of stove pipe you use single wall or double wall you must also account for proper clearances from combustibles.

B and l vents may be in accordance with the appliance and vent listing. 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. 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. Most of the double wall stove pipe allows for 6 clearance from wall combustibles and 8 from ceiling combustibles.

Early 1900 s to about 1975 it was used. When combining lengths remember to subtract 1 5 from each to account for overlap. Metal double wall b vent requires 1 inch minimum clearance. This system is ulc s641 certified.

Each type of vent pipe has recommended clearances to combustible materials. 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. Dvl pipe has a double wall interior and is a close clearance stovepipe designed especially for connecting woodstoves to the chimney. Metal single wall generally requires 6 inches of clearance.

Double wall uninsulated or b vent clearance to combustibles is typically 6 inches. Double wall stovepipe is used when you don t have 18 or more clearance from combustibles.