Double Wall Vent Pipe Clearance To Combustibles

Double wall stovepipe is used when you don t have 18 or more clearance from combustibles.

Double wall vent pipe clearance to combustibles. These pipes are smaller in diameter than any other vent pipe usually with a diameter of 3 or 4 inches. Transite generally requires 1 to 3 inches depending on various factors. 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 insulated clearance to combustibles should be 1 or 2 inches or as the appliance or vent listing allows.

And unlike stove pipe pellet vent pipe does not require class a chimney pipe for installation. Double walled or close clearance stove pipe is used to connect your stove to the chimney. 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. Pellet vent pipe is used to vent pellet burning or corn burning stoves.

Double wall uninsulated or b vent clearance to combustibles is typically 6 inches. B and l vents may be in accordance with the appliance and vent listing. Double wall pellet pipe requires a 1 inch clearance to combustibles. Metal double wall b vent requires 1 inch minimum clearance 3.

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. Dvl pipe has a double wall interior and is a close clearance stovepipe designed especially for connecting woodstoves to the chimney. Double wall pipe should not be cut. Nh fire bear by private email 2016 07 26.

If you are using a b vent typically a double walled air insulated vent for gas appliances typically you ll see a fire clearance stamped right into the metal of the chimney stating 1 inch minimum clearance to combustibles as you ll see in this photo. 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. When combining lengths remember to subtract 1 5 from each to account for overlap. Furnace water heater vent pipe clearance double wall typical listed and labeled double wall vent pipe clearance to combustible materials is one inch but you should always check before installation.

Maximum horizontal section of the furnace water heater double wall vent pipe cannot be longer than 100 of the vertical vent pipe length. Most of the double wall stove pipe allows for 6 clearance from wall combustibles and 8 from ceiling combustibles.