Gases produced during combustion are very hot and as such, easily rise through the flue. It remains hot during the operation of the appliance with minimal condensation in the appliance and vent system. W x 24 in. 2. 1. A Type B or a Type L gas vent shall terminate not less than 5 feet (1524 mm) in vertical height above the highest connected appliance draft hood or flue collar. UL-103 Standard, Building Heating Appliance Chimney Canada: (DWKL-Vt) 7. Double wall is considered Special Gas Vent pipe per section 12.5 of NFPA 54. It operates on natural air convection and is also known as the Type B vent. Type L vents can be either a vent or a connector, and is made to vent oil. To receive emails or mailers with product or company news and updates please fill out our customer form. At first glance, these pipes appear to be nearly the same as the Type B gas vent pipe. Shop and enjoy great savings on the Type L Pellet Vent Pipe in multiple diameters by Metalbest right here at VentingPipe.com. UL-641 Standard, Type L Vent 3. The 5-1/2 in. A lock tab feature offers the option of installing the vent pipe without using sheet metal screws. Class A chimneys are still preferred in the market over L vents, and as such L vents availability is limited. It draws air from within the house for combustion. PL or Type-L Vent Piping. Connect with us if you have any questions or comments for us. UL-441 Standard, Type B Gas Vent 4. We welcome feedback. Minimum clearance between the vent and combustible materials is 3 inches. This is dual-wall pellet vent piping without the ability to feed combustion air to the stove. Sometimes it is listed for “bio-mass venting”, or venting the products of combusting pellets, corn, cherry pits, etc. Click here to find out more about our product offering, company, and terms and conditions. UL-1738 Standard, Special Gas Vent for Category II, III, & IV Appliances 6. They feature the same twist-lock style ends. We look forward to hearing from you! These vent pipe kits include storm collar kits, vent adapters, connectors and elbows. ULC-S636 Standard for Type BH Gas Venting Systems 8. You vent: We listen. Type “L” vent is designed for venting approved oil or gas appliances producing draft hood flue gases not exceeding a temperature of 570ºF (298.8ºC). Natural Vent. Type B vents are a standard design that most modern gas furnaces use. Gas vent pipe from Grainger, manufactured by reliable companies like Ameri-Vent and Bosch, comes in lengths of up to 4'L. [NFPA 54:12.7.2(2)] 802.6.2.2 Type B-W Vents. UL-103 Standard, Building Heating Appliance Chimney (SWKL-Vt) 5. L Round Gas Vent Pipe is made of durable galvanized steel with die-formed ends for uniform sizing and strong, easy-to-connect joints. Pipe lengths are available in multiple lengths, 6 to 60 inches, with a full complement of adjustable and rigid fittings. Type B Gas Vent has been engineered to heat up rapidly.
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