{"product_id":"duravent-round-type-b-gas-vent-model-bv-4-x-5-bell-type-increaser","title":"DuraVent Round Type B Gas Vent Model BV 4\" x 5\" Bell Type Increaser","description":"\u003cp\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/HsiGYJ2y4KQ\" allow=\"fullscreen;\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003eOur non-positional lock system on the DuraVent® BV Gas Vent is the best lock system on the market today. The incorporation of the DuraTab® feature simply improves our lock system by adding flexibility and meeting market needs.\u003c\/p\u003e\n\u003cp\u003eThe BV line of DuraVent round vent pipe and fittings is designed for use on approved gas appliances in residential and light commercial and industrial applications.\u003c\/p\u003e\n\u003ch1\u003eWhat's Included\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eBell Type Increaser\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eFeatures\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eAvailable in 3\"x4\", 4\"x5\" and 4\"x6\" sizes\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eDuraVent\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e4BVBTI5\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eRound Type B Gas Vent Model BV\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eIncreaser\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e4\" x 5\"\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch1\u003eWarranty\u003c\/h1\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 46.5779%;\" data-mce-style=\"width: 46.5779%;\"\u003e\n\u003cdiv style=\"text-align: start;\" data-mce-style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/Lifetime_Warranty_Badge_240x240.jpg?v=1682130235\" alt=\"\" style=\"float: none;\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0100\/7917\/4734\/files\/Lifetime_Warranty_Badge_240x240.jpg?v=1682130235\" data-mce-style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 50.3802%;\" data-mce-style=\"width: 50.3802%;\"\u003eDuraVent, Inc. (“DuraVent”) provides this limited lifetime warranty for all of its products with the exception of Ventinox® (lifetime), and PolyPro® (ten years). Subject to the limitations set forth below, DuraVent warrants that its products will be free from defects in material or manufacturing, if properly installed, maintained, and used.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cdetails\u003e \u003csummary\u003eClick to See \u003cstrong\u003eWarranty Coverage and Limitations\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDuraVent, Inc. (“DuraVent”) provides this limited lifetime warranty for all of its products with the exception of Ventinox® (lifetime), and PolyPro® (ten years). Subject to the limitations set forth below, DuraVent warrants that its products will be free from defects in material or manufacturing, if properly installed, maintained and used. DuraVent products are fully warranted if installed only by a professional installer. This Warranty is transferable from the original homeowner to the buyer of the home. This warranty does not cover normal wear and tear, smoke damage or damage caused by chimney fires, acts of God, or any product that was: (1) purchased other than from an authorized DuraVent dealer, retailer or distributor; (2) modified or altered; (3) improperly serviced, inspected or cleaned; or (4) subject to negligence or any use not in accordance with the installation instructions included with the product as determined by DuraVent.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDuraVent provides the following warranties for its products: One Hundred Percent (100%) MSRP 15 years from the date of purchase, and Fifty Percent (50%) thereafter, except for the following limitations on: all Termination Caps and DuraBlack® are warranted at One Hundred Percent (100%) for five years. All warranty obligations of DuraVent shall be limited to repair or replacement of the defective product pursuant to the terms and conditions applicable to each product line. These remedies shall constitute DuraVent’s sole obligation and sole remedy under this warranty. This warranty provides no cash surrender value. The terms and conditions of this warranty may not be modified, altered or waived by any action, inaction or representation, whether oral or in writing, except upon the express, written authority of an executive officer of DuraVent.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eCorn, bio-fuels, driftwood or other wood containing salt, preservative-treated lumber, plastic and household trash or garbage, or wood pellets containing such materials must not be burned in the appliance or fireplace. In case of a chimney fire, the chimney must be inspected and approved by a certified Chimney Sweep before reuse. After each annual inspection, maintenance, and cleaning, the certified Chimney Sweep must fill out and date the appropriate section of the warranty card provided with the chimney liner.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eLIMITATIONS ON INTERNET SALES: Notwithstanding any other terms or conditions of this Limited Lifetime Warranty, DuraVent provides no warranty for the following specific products if such products are not installed by a qualified professional installer: DuraTech®, DuraTech® DTC, DuraTech® Premium, DuraPlus HTC®, DDW®, DuraChimney® II, PelletVent Pro®, DirectVent Pro®, FasNSeal®, FasNSeal® W2, FasNSeal® Flex, and PolyPro®, and DuraVent’s relining products including DuraLiner®, DuraFlex® (SW, Pro, 316, 304), and Ventinox®. For purposes of this warranty, a trained professional installer is defined as one of the following: licensed contractors with prior chimney installation experience, CSIA Certified Chimney Sweeps, NFI Certified Specialists, or WETT Certified Professionals.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDuraVent must be notified and given the opportunity to inspect defective product prior to replacement under the terms of this limited lifetime warranty. All warranty claims must be submitted with proof of purchase. Labor and installation costs are not covered under this warranty. To obtain warranty service contact: DuraVent Warranty Service, 877 Cotting Ct., Vacaville CA 95688, or call 800-835-4429.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWHERE LAWFUL, DURAVENT DISCLAIMS ALL OTHER WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL DURAVENT BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR SPECIAL DAMAGES OR DIRECT OR INDIRECT LOSS OF ANY KIND, INCLUDING BUT NOT LIMITED TO PROPERTY DAMAGE AND PERSONAL INJURY. DURAVENT’S ENTIRE LIABILITY IS LIMITED TO THE PURCHASE PRICE OF THIS PRODUCT. SOME STATES DO NOT ALLOW LIMITATIONS ON IMPLIED WARRANTIES, OR THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS THAT VARY FROM STATE TO STATE.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/L209_810007492_DV-Limited-Lifetime-Warranty_06-2021.pdf?v=1695119839\" data-mce-href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/L209_810007492_DV-Limited-Lifetime-Warranty_06-2021.pdf?v=1695119839\" target=\"_blank\"\u003eDownload DuraVent Limited Lifetime Warranty here.\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/details\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch1\u003eDocuments \u0026amp; Files\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/Duravent-Model-BV_06-2022.pdf?v=1697336364\" target=\"_blank\"\u003eModel BV Type B Gas Vent Product Catalog\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/L205_DuraVent-Model-BV_Instructions_en060222.pdf?v=1697336486\" target=\"_blank\"\u003eModel BV Type B Gas Vent Installation Instructions (Round and Oval)\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/BV_DuraVent_Specification-Chart_4.6.22.pdf?v=1697336506\" target=\"_blank\"\u003eModel BV Type B Gas Vent Specification Sheet\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/Unit-Heater-Kits-Sales-Sheet_ModelBV_03-14-2022.pdf?v=1697336574\" target=\"_blank\"\u003eModel BV Unit Heater Kits Sheet\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/DuraVent_BV_Expandable_Flex_Connector_MBEFCF-W_SS_4-22.pdf?v=1697336596\" target=\"_blank\"\u003eDuraConnect I Expandable Flex Connector Sheet\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/Duravent-DCII_Brochure_06-2022_V1.pdf?v=1697336619\" target=\"_blank\"\u003eDuraConnect II Double Wall Flex Connector Sheet\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/Bulletin_Adapting-GV-to-BV-and-BV-to-GV_06-2022.pdf?v=1697336988\" target=\"_blank\"\u003eAdapting Model GV Lengths to Model BV \u0026amp; BV to GV Guide\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/Bulletin_GV-to-BV_06-2022.pdf?v=1697337003\" target=\"_blank\"\u003eConnecting Model GV Rain Caps to Model BV Pipe Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eFrequently Asked Questions\u003c\/h1\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eWhat are Type B (Model BV) Gas Vent Systems' Features?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRugged Construction\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eStrong, durable galvanized steel outer pipe has internal spacing beads to assure a uniform insulating air space between pipe walls. Each end is die formed to assure uniform sizing for strong, easy to connect joints. In Canada, some lengths are available in galvalume steel outer pipe. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssured Safety\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe double wall (pipe within a pipe) construction with its built-in air space, provides permanent insulation and keeps the inner pipe hot and the outer pipe relatively cool. This construction creates quick, strong vent action reducing condensation in the pipe and overheating of nearby enclosure surfaces.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFully Tested and Listed\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDuraVent Model BV and BVO Type B Gas Vent has been tested and listed per UL 441 for installation as Type B and BW gas vents. These can be installed in single and multi-story buildings in accordance with the standards of NFPA 54 and NFPA 211. In Canada, DuraVent Model BV Type B Gas Vent has been tested and listed per CAN\/ULC-S605 for installation as Type B and BW gas vents. It can be installed in single and multi-story buildings in accordance with CAN\/CSA-B149.1.00.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3″-6″ Termination Kits Include: DuraCap, Storm Collar, Adjustable Roof Flashing, Draft Hood Connector (Lengths sold separately)\u003c\/li\u003e\n\u003cli\u003e3″-4″ Vertical Heater Kit Includes: 12” \u0026amp; (3) 24” Galvalume Pipe Lengths, 90° Elbow, 4” Diameter Draft Hood Connector, 3” Draft Hood Connector, 3”-4” Increaser, Adjustable Flashing, Storm Collar \u0026amp; DuraCap\u003c\/li\u003e\n\u003cli\u003eUSA Only – 4″ Oval Kit Includes: (2) 24″ Lengths, Oval Base Plate, (2) Ceiling Spacers, Oval-Round Adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLengths\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e18″ Adjustable Lengths in 3″-6″ diameters\u003c\/li\u003e\n\u003cli\u003e12″ \u0026amp; 24″ Lengths in 10″-30″ diameters\u003c\/li\u003e\n\u003cli\u003eCanada – Additional 24″ Galvalume Length (8BV24C)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReducing Tees\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard Tee paired with Low Profile Increasers\u003c\/li\u003e\n\u003cli\u003eIncreaser can be installed at the branch or the body\u003c\/li\u003e\n\u003cli\u003e3″ – 8″ diameter combinations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLow Profile Increasers\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNew space saving length where height restrictions apply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUniversal Male and Female Adapters\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMale Adapter – Used to convert Model GV to Model BV\u003c\/li\u003e\n\u003cli\u003eFemale Adapter – Used to convert Model BV to Model GV\u003c\/li\u003e\n\u003cli\u003eAvailable in 3″ – 8″ diameter sizes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuick Grip Firestops \/ Supports\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCombination Firestop and Vent Support\u003c\/li\u003e\n\u003cli\u003eSupports up to 30′ of pipe\u003c\/li\u003e\n\u003cli\u003eAvailable in 3″ -6 ” diameter sizes\u003c\/li\u003e\n\u003cli\u003eInstall above a framed opening\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDuraConnect I – Expandable Flexible Connectors\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAvailable in 3″ \u0026amp; 4″ diameters\u003c\/li\u003e\n\u003cli\u003eAvailable in 3′ (expandable from 2′ – 3.5′) and 5′ (expandable from 2.5′ – 5′) lengths\u003c\/li\u003e\n\u003cli\u003eReplaces Single Wall Connectors\u003c\/li\u003e\n\u003cli\u003eDraft Hood Connector Incorporated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eITEM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eCLEARANCE - SEE NOTE 1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eMAX HEIGHT\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eOUTER TUBE Ø\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eMATERIALS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eLOCKING DEVICE\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eUL LISTING\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType B Vent Round 3″-8″ (USA)\u003c\/td\u003e\n\u003ctd\u003e1 inch\u003c\/td\u003e\n\u003ctd\u003e100 feet\u003c\/td\u003e\n\u003ctd\u003e1\/2\" larger than ID\u003c\/td\u003e\n\u003ctd\u003eInner - .012\" Aluminum Outer - .018\" Galvanized\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eDuraLock \u0026amp; DuraTab\u003c\/td\u003e\n\u003ctd\u003eMH2848\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType B Vent Round 3\"-8\" (CAN)\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1 inch\u003c\/td\u003e\n\u003ctd\u003e100 feet\u003c\/td\u003e\n\u003ctd\u003e1\/2\" larger than ID\u003c\/td\u003e\n\u003ctd\u003eInner - .012\" Aluminum Outer - .018\" Galvalume*\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eDuraLock \u0026amp; DuraTab\u003c\/td\u003e\n\u003ctd\u003eMH2848\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRound 10\" to 18\" - See note 2\u003c\/td\u003e\n\u003ctd\u003e1 inch\u003c\/td\u003e\n\u003ctd\u003e100 feet\u003c\/td\u003e\n\u003ctd\u003e1\" larger than ID\u003c\/td\u003e\n\u003ctd\u003eInner - .014\" Aluminum Outer - .018\" Galvanized\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eDuraLock\u003c\/td\u003e\n\u003ctd\u003eMH2848\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRound 20\" to 30\" (USA) See note 2\u003c\/td\u003e\n\u003ctd\u003e1 inch\u003c\/td\u003e\n\u003ctd\u003e100 feet\u003c\/td\u003e\n\u003ctd\u003e1\" larger than ID\u003c\/td\u003e\n\u003ctd\u003eInner - .023\" Aluminum Outer - .018\" Galvanized\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eDuraLock\u003c\/td\u003e\n\u003ctd\u003eMH2848\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRound 20\" to 24\" (CAN) See note 2\u003c\/td\u003e\n\u003ctd\u003e1 inch\u003c\/td\u003e\n\u003ctd\u003e100 feet\u003c\/td\u003e\n\u003ctd\u003e1\" larger than ID\u003c\/td\u003e\n\u003ctd\u003eInner - .023\" Aluminum Outer - .018\" Galvanized\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eDuraLock\u003c\/td\u003e\n\u003ctd\u003eMH2848\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRound 26\" to 30\" (CAN) See note 2\u003c\/td\u003e\n\u003ctd\u003e2 inch\u003c\/td\u003e\n\u003ctd\u003e100 feet\u003c\/td\u003e\n\u003ctd\u003e1\" larger than ID\u003c\/td\u003e\n\u003ctd\u003eInner - .023\" Aluminum Outer - .018\" Galvanized\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eDuraLock\u003c\/td\u003e\n\u003ctd\u003eMH2848\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOval Type B Gas Vent 4\" and 5\"\u003c\/td\u003e\n\u003ctd\u003e1 inch - See Note 5\u003c\/td\u003e\n\u003ctd\u003eSee Note 3\u003c\/td\u003e\n\u003ctd\u003e4\": 2 1\/2\" x 7 1\/4\" or 5\": 3 1\/8\" x 10 7\/8\"\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eInner - .012\" Aluminum Outer - .018\" Galvanized\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eDuraLock\u003c\/td\u003e\n\u003ctd\u003eMH2848\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOval Type B Vent 6\"\u003c\/td\u003e\n\u003ctd\u003e1 inch - See Note 5\u003c\/td\u003e\n\u003ctd\u003eSee Note 3\u003c\/td\u003e\n\u003ctd\u003e3 1\/4\" x 12\"\u003c\/td\u003e\n\u003ctd\u003eInner - .012\" Aluminum Outer - .018\" Galvanized\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eDuraLock\u003c\/td\u003e\n\u003ctd\u003eMH2848\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDuraConnect | Flex 3\" and 4\"\u003c\/td\u003e\n\u003ctd\u003e1 inch\u003c\/td\u003e\n\u003ctd\u003eSee Note 4\u003c\/td\u003e\n\u003ctd\u003eNA\u003c\/td\u003e\n\u003ctd\u003e.012\" Aluminum Flexible .018\" Galvalume Fittings\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eDuraLock \u0026amp; DuraTab\u003c\/td\u003e\n\u003ctd\u003eMH17667\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDuraConnect II Flex 3\" to 5\"\u003c\/td\u003e\n\u003ctd\u003e1 inch\u003c\/td\u003e\n\u003ctd\u003eSee Note 4\u003c\/td\u003e\n\u003ctd\u003e1\/4\" larger than ID\u003c\/td\u003e\n\u003ctd\u003e.006\" 2 Ply Aluminum Flex .018\" Galvalume Fittings\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003eDuraLock \u0026amp; DuraTab\u003c\/td\u003e\n\u003ctd\u003eMH17667\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003e*In Canada, the outer tube material is galvalume for 3″ to 8″ pipe length. All other 3″ to 8″ fittings have a galvanized outer tube.\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes: Gas Vent Specification Chart\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eClearance to combustibles is the air space between vent and combustibles.\u003c\/li\u003e\n\u003cli\u003eFor maximum height refer to the appliance manufacturer installation instructions and the National Fuel Gas Code NFPA 54 or the Canadian Fuel Gas Installation Code CSA-149.1-00. For taller applications refer to DuraVent Sizing Handbook.\u003c\/li\u003e\n\u003cli\u003eWhen oval is used on wall furnaces, minimum height required from bottom of furnace to cap is 12′, minimum 16″ stud space.\u003c\/li\u003e\n\u003cli\u003eLimited by sizing tables.\u003c\/li\u003e\n\u003cli\u003eBVO 4″ \u0026amp; 5″ oval can be installed in a 2″ x 4″or a 2″ x 6″ stud wall. BVO 6″ oval can be installed in a 2″ x 6″ stud wall.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/details\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eWhat are Type B (Model BV) Gas Vent Systems' Specifications?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/p\u003e\nDuraVent’s Type B Gas Vent system. Use with natural gas or liquid propane Category I and draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent. Applications include: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications.\u003cbr\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials and Construction\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eRound Type B Gas Vent 3″ – 8″ and Oval 4″ – 6″: Aluminum .012″ inner wall, galvanized .018″ outer wall, in Canada, the lengths have a galvalume .018″ outer wall. The 3″ – 8″ Round gas vent features DuraLock® and DuraTab® . The Oval gas vent features the button lock. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eRound Type B Gas Vent 10″ – 18″: Aluminum .014″ inner wall, galvanized .018″ outer wall. DuraLock® feature for 10″ and larger diameters.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eRound Type B Gas Vent 20″ – 30″: aluminum .023″ inner wall, galvanized .018″ outer wall. DuraLock® feature for 10″ and larger diameters.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClearances\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eClearances to combustible materials in single and multi-family dwellings:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1″ Clearance – USA – 3″ to 30″\u003c\/li\u003e\n\u003cli\u003e1″ Clearance – Canada – 3″ to 24″\u003c\/li\u003e\n\u003cli\u003e2″ Clearance – Canada – 26″ to 30″\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnnular insulating air space\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3″ – 8″ Round Vent: 1\/4″ air space\u003c\/li\u003e\n\u003cli\u003e4″ – 6″ Oval Vent: 1\/4″ air space\u003c\/li\u003e\n\u003cli\u003e10″ – 30″ Round Vent: 1\/2″ air space\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDiameters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e3″- 30″ Round Diameter.\u003cbr\u003e4″, 5″ and 6″ Oval (USA only)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eListings\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUL Listed to UL 441 and CAN\/ULC-S605 (MH2848 and MH17667).\u003c\/p\u003e\n\u003c\/details\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 16.3333px;\"\u003e\n\u003ctd style=\"height: 16.3333px;\"\u003e\u003cdetails\u003e \u003csummary\u003e\u003cstrong\u003eWhat is the Type B (Model BV) Gas Vent Systems' Termination Guide?\u003cbr\u003e\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow Size and Height Affect Stove Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe amount of heat the vent gases lose as they flow determines how much condensation will occur and how strong the draft will be. To control the heat loss, proper selection of venting materials is of vital importance.\u003c\/li\u003e\n\u003cli\u003eDouble-wall Type B Gas Vent, with an aluminum inner wall and a galvanized steel outer wall, has proven to be the ideal choice in venting materials. In Canada some lengths have a galvalume outer wall.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVent Termination Chart\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eListed Type B Gas Vent caps may terminate in accordance with this table.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003e\n\u003cstrong\u003eMinimum height\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eRoof Pitch\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eFeet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eMeters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlat to 7\/12\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e0.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver 7\/12 to 8\/12\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003ctd\u003e0.46\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver 8\/12 to 9\/12\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e0.61\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver 9\/12 to 10\/12\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e0.76\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver 10\/12 to 11\/12\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e3.25\u003c\/td\u003e\n\u003ctd\u003e0.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver 11\/12 to 12\/12\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e1.22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver 12\/12 to 14\/12\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e1.52\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver 14\/12 to 16\/12\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e1.83\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver 16\/12 to 18\/12\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e2.13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver 18\/12 to 20\/12\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e7.5\u003c\/td\u003e\n\u003ctd\u003e2.29\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOver 20\/12 to 21\/12\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e2.44\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/details\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable data-mce-fragment=\"1\" width=\"100%\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"height: 16.3333px;\" data-mce-style=\"height: 16.3333px;\"\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"height: 16.3333px;\" data-mce-style=\"height: 16.3333px;\"\u003e\u003cdetails data-mce-fragment=\"1\"\u003e \u003csummary data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eWhat is the Type B (Model BV) Gas Vent Systems' Large Diameter Installations?\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong\u003eLarge Diameter – Vertical Installations\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/DVBBV-Table2.jpg?v=1697335363\"\u003e\u003c\/p\u003e\n\u003c\/details\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable data-mce-fragment=\"1\" width=\"100%\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"height: 16.3333px;\" data-mce-style=\"height: 16.3333px;\"\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"height: 16.3333px;\" data-mce-style=\"height: 16.3333px;\"\u003e\u003cdetails data-mce-fragment=\"1\"\u003e \u003csummary data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eWhat is the Type B (Model BV) Gas Vent Systems' Small Diameter Installations?\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong\u003eSmall Diameter – Vertical Installations\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0813\/8725\/8148\/files\/DVBBV-Table3.jpg?v=1697335363\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/details\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable data-mce-fragment=\"1\" width=\"100%\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"height: 16.3333px;\" data-mce-style=\"height: 16.3333px;\"\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"height: 16.3333px;\" data-mce-style=\"height: 16.3333px;\"\u003e\u003cdetails data-mce-fragment=\"1\"\u003e \u003csummary data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eWhat are B Vent Frequently Asked Questions?\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong\u003e1. What is the clearance for BW Oval?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eClearance is 1” or as determined by using the Ceiling Plate Spacer and the Firestop Spacer.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e2. Can I put screws in Type B Gas Vent?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eYes, if desired, but DO NOT PUNCTURE THE INNER LINER! From 3” through 8”, the screw should be located approximately 1\/4” from overlapped edge and must be a maximum 1\/4” in length so they do not pierce or deform the inner liner. On diameters of 10” through 30” the screw must be a maximum of 1\/2” in length so they do not pierce or deform the inner liner.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e3. Can Type B Gas Vent terminate horizontally on a wall?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eNo, only Cat III 1738 and ULC-S636 approved systems can terminate on a side wall.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e4. What flashing do I use for pitches over 7\/12?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eAn Adjustable Steep Roof Flashing for roof pitch of 6\/12 to 12\/12.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e5. Which support do I use: round or square support?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eA variety of supports are available: Support Assembly and the Quick Grip Firestop Support are used on top of the ceiling joist; the Round Bucket Support is installed at the ceiling level. The Band Collar is clamped securely to the pipe and the pipe lowered into the Bucket Support so the Band Collar sits firmly inside of the Bucket Support.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e6. What is the inner liner made of?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eDiameters 3” to 8” – .012” thick aluminum; Diameters 10” to 18” – .014” thick aluminum; Diameters 20” to 30” – .023” thick aluminum\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e7. Is Oval Type B Gas Vent UL listed in 2 x 4 wall?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eYes, 4” and 5” is approved centered in a 2×4 wall space; 6” is for 2×6 walls only. When oval vent is installed in a stud wall, the Firestop Spacer must be used. When connected to a wall furnace, the Hold Down Plate, Ceiling Plate Spacer and Firestop Spacer must be used.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e8. Can I common vent 2 gas fireplaces?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eNo. Common vent tables only cover furnace or water heater common venting.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e9. Is this L-Vent?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eNo, L-Vent needs stainless steel inner liner.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e10. Can I use Type B Gas Vent on an oil furnace?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eNo. Oil requires stainless steel inner liner.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e11. How often do I support the pipe?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eSupport every 5’ for diameters 3” through 8” and every other floors for diameters 10” through 30”. Use a Wall Support Band, Support Plate, Quick Grip or Round Bucket Support. Support components can support 30’ – 35’, see individual supports for exact amount. Vertical runs must have firestops and stability every 8’ – 10’ and need only be supported near the bottom. Provide lateral support at least every 5’. All gas vents extending above the roof  more than 5’ must be securely braced. Use a Wall Support Band, Support Plate, Quick Grip or Round Bucket Support.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e12. Is a draft hood connector needed?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eSome water heaters require one; it is optional for furnaces or gas fireplaces. A Draft Hood is available from 3” to 18”.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e13. What is the maximum temperature?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e400°F (205°C) + AMB (room temperature) to a maximum of 470°F (245°C) operating temperature.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e14. Does horizontal venting require an upward pitch?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eA ¼ inch per foot minimum pitch is required to vent horizontally. No  downward dips or sags are allowed.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e15. Is there a firestop plate?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eYes, it is called the Firestop Spacer, and is required at every floor\/ceiling level penetrated.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e16. What is minimum termination height?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eThere is a 1’ minimum for up to 7\/12 roof pitch. See Table 1 in the instructions if over 7\/12.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e17. Is the Male \u0026amp; Female Adapter UL Listed for use with other UL Listed Type B Gas Vents?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eYes. It is listed for use with most UL listed competitors Type B Gas Vents.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e18. How do I size my appliance?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eFor (2) or more appliances, use the sizing handbook or the tables found in the National Fuel Gas Code NFPA 54 and the Canadian Fuel Gas Installation Code CSA-B149.1.00.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e19. How do I order a reduction tee?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eSpecify main body and branch size to Customer Service.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e20. What is the overlap of pipe?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eYou must deduct 1 ½” overlap per connection for 3” through 8” and 1” for 10” through 30” per end of pipe.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003e21. What flashing do I use for flat roof?\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eTall cone flashing is for flat (0\/12) roof pitch.\u003c\/p\u003e\n\u003c\/details\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable data-mce-fragment=\"1\" width=\"100%\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"height: 16.3333px;\" data-mce-style=\"height: 16.3333px;\"\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"height: 16.3333px;\" data-mce-style=\"height: 16.3333px;\"\u003e\u003cdetails data-mce-fragment=\"1\"\u003e \u003csummary data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eWhat are the DuraVent product lines?\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eDuraVent offers the following product lines:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDuraTech 5″-8″: All-fuel, double-wall chimney system. UL 103 HT and ULC S604.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraTech 10″-24″: All-fuel, double-wall chimney system. UL 103.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraTech Canada is a double-wall, all-fuel chimney system for use with wood stoves, wood fireplaces, and other appliances using wood, oil, gas, or coal.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraPlus: Triple-wall all-fuel chimney with two layers of insulation.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraPlus HTC: Double-wall all-fuel chimney built to Canadian standards.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraChimney II: Double-wall air-cooled chimney for pre-fabricated masonry chimneys.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eCombustion Air Systems: DuraVent’s exclusive, patent-pending system is designed to bring in outside combustion air directly to your wood or pellet stoves.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraBlack: Single-wall stovepipe.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDVL: Double-wall stovepipe.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraLiner: Double-wall factory insulated masonry relining system.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraFlex: Flexible stainless steel liners.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraFlex Aluminum: Flexible aluminum relining for masonry chimney. UL 1777 and ULC S635.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eVentinox: Flexible stainless steel liner.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eCVS: Provides Ortal Branded Fireplace Systems and as a Direct Vent for Pellet Stoves.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003ePelletVent: Multi-fuel vent.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003ePelletVent Pro: Vents appliances using oil, wood pellets, corn, and other biofuels.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDirectVent Pro: Unitized, co-axial venting system for direct vent gas or propane stoves, heaters, and fireplaces.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eType B Gas Vent: Vents natural gas, liquid propane category I, and draft-hood equipped appliances\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eFasNSeal: Single, double-wall, flex, and concentric venting for category II, III, and IV appliances.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eFasNSeal 80\/90: Combined Category I and IV venting for Gas-Burning Appliances.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003ePolyPro: Single-wall, flex, and concentric venting made of polypropylene for category II and IV condensing appliances that operate up to 248 degrees.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003ePolyPro Flex: PolyPro double-wall flex lining system. Environmentally safe venting system for high-efficiency appliances, including water heaters, condensing boilers, and warm air furnaces. ULC S636.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraSeal: Single-Wall and Double-Wall Special Gas Vent Boiler Adapters.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraStack: A modular double-wall, positive pressure chimney for use with boiler breeching and stack, engine exhaust, and grease duct (DIS only)\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eDuraStack Pro: Models DIS and DAS. Modular Double-Wall Positive Pressure Chimney for Boiler Breeching, Stack, and Engine Exhaust.\u003c\/p\u003e\n\u003c\/details\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"DuraVent","offers":[{"title":"Default Title","offer_id":45434816692394,"sku":"4BVBTI5","price":26.62,"currency_code":"USD","in_stock":true}],"url":"https:\/\/usfireplacestore.com\/products\/duravent-round-type-b-gas-vent-model-bv-4-x-5-bell-type-increaser","provider":"US Fireplace Store","version":"1.0","type":"link"}