Electric & Space Heaters Natural Gas & Propane. MR. HEATER Big Maxx Natural Gas Garage & Workshop Heater - with Propane Conversion Kit, 50,000 BTU. 7 Reviews. Item: #5530-808. Model: #F2-60550.Buy Mr. Heater Category 3 Horizontal 4 in. Vent Kit at Tractor Supply Co. Great Customer Service.Shop Mr. Heater Enerco Horizontal Vent Kit - 4-in - Stainless Steel at Lowe's Canada online store. Find Shop & Garage Heaters at lowest price guarantee. 11% Mail-In Rebate Good Through 9/4/23. $47.19. Final Price $ 381 81. each. You Save $47.19 with Mail-In Rebate. Ceiling-mounted forced air unit heater turns garages, barns, and workshops into heated workspaces. 50,000 BTUs heat up to 1,250 sq ft, or approximately a 3-car garage. Ships as natural gas; includes natural gas to propane conversion kit. Find many great new & used options and get the best deals for 4"Vertical Venting Kit Mr. Heater,Big Maxx , Hot Dawg, modine gas heater vent at the best online prices at eBay! Free shipping for many products!Shop mr. heater category 3 horizontal 6 in vent kit for big maxx heaters in the pellet stoves section of Lowes.com Find many great new & used options and get the best deals for 4"Vertical Venting Kit Mr. Heater,Big Maxx , Hot Dawg, modine gas heater vent at the best online prices at eBay! Free shipping for many products!Jun 14, 2023 · NOW. $89.99. Quantity Available: 1. Date Added: 6/14/2023. Location: RACINE. Vertical Exhaust kit for a Big Maxx garage heater. To purchase this item contact the Plumbing department at the Menards ® RACINE store in person. Questions about this item can be answered by e-mail. Buy Mr. Heater F260550 Big Maxx MHU50NG Natural ... Powered exhaust allows for vertical or horizontal venting ... Mr. Heater F299201 Vent-Free Blower Accessory Kit ...Sep 4, 2023 · Heatfab is the leading manufacturer of high quality venting systems for special gas vent applications, specified by OEM's for over 20 years. Time-tested installations thoughout North America and globally. Our Saf-T Vent® line of products are perfect for your commercial and industrial needs. ANSI Category I, II, III, and IV appliances: boilers, water heaters and furnaces. Item # 46677. Model # F202858. Get Pricing and Availability. Use Current Location. Universal ventilation kit for the Mr. Heater Big Maxx garage heater. Adapter included for compatibility with 3" pipe. This item is no longer sold on Lowes.com. Category III 4in Stainless Steel Horizontal Vent Kit. SKU. F102860. Category III 4in Stainless Steel Horizontal Vent Kit for use with 50,000-200,000 BTU Unit Heaters. find a distributor.Mr. Heater. 30,000 BTU Vent Free Blue Flame Natural Gas Heater. Add to Cart. Compare. Exclusive. More Options Available $ 239. 00 (236) Model# MHC125FAV. Mr. Heater. Amazon.com: Mr. Heater 4 inch Stainless Steel Horizontal Vent Kit for Big Maxx MHU50 and MHU80 Unit Heaters : Tools & Home Improvement Tools & Home Improvement › Building Supplies › HVAC › Heaters & Accessories $37499 FREE delivery August 23 - 28. Details Select delivery location In Stock Qty: 1 Buy Now Payment Secure transaction Ships fromThis Modine Hot Dawg 45,000 BTU Natural Gas Garage Ceiling Heater features a compact, low-profile design great for installing in locations where space is limited. This heater surface mounts to the ceiling and accommodates piping from the left or right side for versatility. Produces up to 45,000 BTU/hour to keep you warm and comfortable on cold ... EZ Pro Single Zone 24000-BTU 18 SEER Ductless Mini Split Air Conditioner and Heater with 16-ft Installation Kit. Model # EZPRO-24-HP-23016. Find My Store. for pricing and availability. 2. MRCOOL. DIY Series Dual Zone 27000-BTU 22 SEER Ductless Mini Split Air Conditioner and Heater with 25,25-ft Installation Kit. Mr Heater Big Maxx Natural Gas Unit Heater With Ng To Lp Conversion Kit 80,00... Sponsored. $757.99. $1,174.47. Free shipping.This Modine Hot Dawg 45,000 BTU Natural Gas Garage Ceiling Heater features a compact, low-profile design great for installing in locations where space is limited. This heater surface mounts to the ceiling and accommodates piping from the left or right side for versatility. Produces up to 45,000 BTU/hour to keep you warm and comfortable on cold ...The Z-Flex 4 Inch Horizontal Vent Kit in stainless steel contains the basic components required to vent a tankless water heater through an outside wall. A back-flow preventer is included for cold climates to help prevent freezing of the water heaters internal piping during cold weather. Includes: 4-in diam. Termination Hood, 4-in diam. x 90 Degree Elbow, 4-in diam. x 1-ft Straight Pipe, 4-in ... Mr. Heater. 30,000 BTU Vent Free Blue Flame Natural Gas Heater. Add to Cart. Compare. Exclusive. More Options Available $ 239. 00 (236) Model# MHC125FAV. Mr. Heater.Mr Heater 4in Stainless Steel Horizontal Vent Kit. SKU# F102860. In Stock (Ships in 3-5 business days) Made In USA. Free Shipping (Ground shipping to lower 48) Low Price Guarantee. $324.99. List: $593.42. (Max. order of 1,000) 4" Horizontal Stainless Steel Z-Vent Wall Hung Water Heater Vent Kit for horizontal installation of Eccotemp 45HI and EL22i Series indoor water heaters.Used to drain condensate from the vent system, high temperature drain tube kit sold separately.Low resistance rain cap is designed to terminate a vertical stack and prevent the entrance of debris or rain in to the vent, it also provides low ... Shop mr. heater category 3 horizontal 6 in vent kit for big maxx heaters in the pellet stoves section of Lowes.com DuraVent Gray 3-in pellet vent kit. Kit includes: round horizontal cap, 90° elbow, wall strap, five 12” pipe lengths, tee with clean-out tee cap, wall thimble, appliance adapter. 4” kit includes a 3”-4” appliance adapter/increaser. HE and HE+ 12 In non-condensing horizontal termination kit (metal) For use with Rinnai high efficiency Tankless water heaters. Concentric venting reduces install time and costs, allows for secure connection and ease of assembly/adjustmentSaf-T Vent® Model EZ Seal/EZ 316 . Single Wall . Gas Vent Connector . Chimney Liner & Special Gas Vent (USA) / Type BH Vent Class I/II (Canada) For Venting Residential, Commercial & Industrial Appliances . Category I, II, III & IV Appliances . 3”-5” Diameter Vent for use on Positive, Neutral and Negative . Pressures up to 9” W.C.Jun 14, 2023 · NOW. $88.99. Quantity Available: 1. Date Added: 6/14/2023. Location: RACINE. 4" Vertical Exhaust Kit. To purchase this item contact the Plumbing department at the Menards ® RACINE store in person. Questions about this item can be answered by e-mail. Bargain items are NOT available for online purchase. This heater offers the operating versatility and safety that you have come to expect from Mr. Heater®. 125,000 BTU per hour. For use with natural gas. Heats up to 4,167 sq. ft. Spark ignition features self-diagnostic control module. Includes 2 angle brackets for ceiling mount. Low Profile Design - Can be installed in low-ceiling buildings. Horizontal Unit Heater Vent Material List. Model Number: 6955535 Menards ® SKU: 6955535. Everyday Low Price. $275.94. 11% Mail-In Rebate Good Through 8/27/23. $30.35. Final Price $ 245 59. each.11% Mail-In Rebate Good Through 9/4/23. $47.19. Final Price $ 381 81. each. You Save $47.19 with Mail-In Rebate. Ceiling-mounted forced air unit heater turns garages, barns, and workshops into heated workspaces. 50,000 BTUs heat up to 1,250 sq ft, or approximately a 3-car garage. Ships as natural gas; includes natural gas to propane conversion kit.Power exhaust allows for vertical or horizontal venting; Designed for right or left side piping, electrical and flue connections by simply rotating 180° Tubular heat exchanger and spark ignition; 6 Amp draw; Horizontal venting kit, Item# 29794, and vertical venting kit sold separately Category I 4in Vertical Vent Kit. SKU. F102848. Category I 4in Vertical Vent Kit for use with 50,000-200,000 BTU Unit Heaters. find a distributor. The Z-Flex 4 Inch Horizontal Vent Kit in stainless steel contains the basic components required to vent a tankless water heater through an outside wall. A back-flow preventer is included for cold climates to help prevent freezing of the water heaters internal piping during cold weather. Includes: 4-in diam. Termination Hood, 4-in diam. x 90 Degree Elbow, 4-in diam. x 1-ft Straight Pipe, 4-in ... mr. heater university faqs and product data ... vent free. cabinet. forced air propane ... portable oil-fired. portable radiant. dual lp tank hook-up kit. learn more ...Pay in 4 interest-free installments of $28.75 with. Learn more. Free sitewide shipping over $99*. Low price guarantee*. Safely exhaust your power vented gas-fired heater with our easy-to-use horizontal vent kit. Each kit contains 4 - 2ft. length of vent pipe, a corrosion resistant galvanized steel vent cap, wall thimble.Mr Heater 4in Stainless Steel Horizontal Vent Kit. SKU# F102860. In Stock (Ships in 3-5 business days) Made In USA. Free Shipping (Ground shipping to lower 48) Low Price Guarantee. $324.99. List: $593.42. (Max. order of 1,000)Final Price $ 489 49. each. You Save $60.50 with Mail-In Rebate. Ceiling-mounted forced air unit heater turns garages, barns, and workshops into heated workspaces. 80,000 BTUs heat up to 2,667 sq ft, or approximately a 3 or 4-car garage. Ships as natural gas; includes natural gas to propane conversion kit. View More Information. FFXWTSF Portable AC Window Vent Kit 5.9” Coupler Adjustable Vertical Horizontal. $29.97. Free shipping. DuraVent Vent Unit Heater Kit — 4in. Horizontal, Model# 810006013 (Q-26) Shop 25 mr heater horizontal vent kit at Northern Tool + Equipment. ... DuraVent Vent Unit Heater Kit — 4in. Horizontal, Model# 810006013 Reg. $ 444. 99. Sale ...Find many great new & used options and get the best deals for Mr. Heater Mhu50 4" Stainless Steel Horizontal Vent Kit Unit Heaters Silver F102860 at the best online prices at eBay! Free shipping for many products!FFXWTSF Portable AC Window Vent Kit 5.9” Coupler Adjustable Vertical Horizontal. $29.97. Free shipping. DuraVent Vent Unit Heater Kit — 4in. Horizontal, Model# 810006013 (Q-26) This euro-styled design provides a modern take on a traditional pellet stove heater and delivers perfect heating performance while saving you money. The AP5000 wall mounted pellet stove heater has a direct vent design avoiding the typical chimney installs of a traditional pellet stove. Best of all, everything needed is included in the box.Category III 4in Stainless Steel Horizontal Vent Kit. $428.59. Add to Wish List. Add to Cart. ... COPYRIGHT MR. HEATER 2020. Enerco Group Inc / Mr. Heater 4560 West ... The Z-Flex 4 Inch Horizontal Vent Kit in stainless steel contains the basic components required to vent a tankless water heater through an outside wall. A back-flow preventer is included for cold climates to help prevent freezing of the water heaters internal piping during cold weather. Includes: 4-in diam. Termination Hood, 4-in diam. x 90 Degree Elbow, 4-in diam. x 1-ft Straight Pipe, 4-in ...We would like to show you a description here but the site won’t allow us. This euro-styled design provides a modern take on a traditional pellet stove heater and delivers perfect heating performance while saving you money. The AP5000 wall mounted pellet stove heater has a direct vent design avoiding the typical chimney installs of a traditional pellet stove. Best of all, everything needed is included in the box. We would like to show you a description here but the site won’t allow us.DuraVent Gray 3-in pellet vent kit. Kit includes: round horizontal cap, 90° elbow, wall strap, five 12” pipe lengths, tee with clean-out tee cap, wall thimble, appliance adapter. 4” kit includes a 3”-4” appliance adapter/increaser. HEATER. #5530-039. 3" - 4" Vertical Vent Kit (2) MR. HEATER. #5530-810. 1 Page 1 of 1. When you have to or want to work in an outbuilding in the depths of winter, you won’t last long without a heating source. Enerco’s Mr. Heater brand has been developing innovative heaters since 1984, becoming one of North America’s most popular brands. Sep 26, 2021 · Find many great new & used options and get the best deals for 4"Vertical Venting Kit Mr. Heater,Big Maxx , Hot Dawg, modine gas heater vent at the best online prices at eBay! Free shipping for many products! This Modine Hot Dawg 45,000 BTU Natural Gas Garage Ceiling Heater features a compact, low-profile design great for installing in locations where space is limited. This heater surface mounts to the ceiling and accommodates piping from the left or right side for versatility. Produces up to 45,000 BTU/hour to keep you warm and comfortable on cold ... Category III 4in Stainless Steel Horizontal Vent Kit. SKU. F102860. Category III 4in Stainless Steel Horizontal Vent Kit for use with 50,000-200,000 BTU Unit Heaters. find a distributor.Mr. Heater Big Maxx Silver Wall-mounted Garage Heater Vent Kit. The category 1 vertical 4 in vent kit provides class 1 single wall B-vent ducting for Mr. Heater Big Maxx unit heaters, ranging from 50,000, 80,000, and 125,000 BTUs. Complies with US standard (UL441) and Canadian standard (S605). Designed for vertical installation only.Mr. Heater 4 Inch Horizontal Vent Kit for Big Maxx MHU45LP, MHU45NG, MHU75LP and MHU75NG Unit Heaters #F102845 F102845 vent kit Used for horixontal venting on MHU45 heaters Used for horixontal venting on MHU75 heaters Maintains proper clearances through combustible construction May require additional parts to meet local codes The Mr. Heater 4 Horizontal VentNOW. $88.99. Quantity Available: 1. Date Added: 6/14/2023. Location: RACINE. 4" Vertical Exhaust Kit. To purchase this item contact the Plumbing department at the Menards ® RACINE store in person. Questions about this item can be answered by e-mail. Bargain items are NOT available for online purchase.Saf-T Vent® Model EZ Seal/EZ 316 . Single Wall . Gas Vent Connector . Chimney Liner & Special Gas Vent (USA) / Type BH Vent Class I/II (Canada) For Venting Residential, Commercial & Industrial Appliances . Category I, II, III & IV Appliances . 3”-5” Diameter Vent for use on Positive, Neutral and Negative . Pressures up to 9” W.C.We would like to show you a description here but the site won’t allow us.Category III 6in Horizontal Vent Kit. SKU. F102861. Category III 6in Horizontal Vent Kit for use with 50,000-200,000 BTU Unit Heaters. find a distributor.Overview. Kit includes: round horizontal cap, 90° elbow, wall strap, five 12” pipe lengths, tee with clean-out tee cap, wall thimble, appliance adapter. 4” kit includes a 3”-4” appliance adapter/increaser. DuraVent’s PelletVent installation kits include all the parts you need foray “out” through-the-wall style installation. Arrives by Tue, Dec 27 Buy Mr. Heater 4 Inch Horizontal Vent Kit for Big Maxx MHU45LP, MHU45NG, MHU75LP and MHU75NG Unit Heaters #F102845 at Walmart.com FREE shipping by Christmas. Order by 12/21 at 2pm & get gifts in time. $35 min. Restrictions apply. Buy Mr. Heater F260550 Big Maxx MHU50NG Natural ... Powered exhaust allows for vertical or horizontal venting ... Mr. Heater F299201 Vent-Free Blower Accessory Kit ...Pay in 4 interest-free installments of $28.75 with. Learn more. Free sitewide shipping over $99*. Low price guarantee*. Safely exhaust your power vented gas-fired heater with our easy-to-use horizontal vent kit. Each kit contains 4 - 2ft. length of vent pipe, a corrosion resistant galvanized steel vent cap, wall thimble. Jun 14, 2023 · NOW. $88.99. Quantity Available: 1. Date Added: 6/14/2023. Location: RACINE. 4" Vertical Exhaust Kit. To purchase this item contact the Plumbing department at the Menards ® RACINE store in person. Questions about this item can be answered by e-mail. Bargain items are NOT available for online purchase. 4" Horizontal Stainless Steel Z-Vent Wall Hung Water Heater Vent Kit for horizontal installation of Eccotemp 45HI and EL22i Series indoor water heaters.Used to drain condensate from the vent system, high temperature drain tube kit sold separately.Low resistance rain cap is designed to terminate a vertical stack and prevent the entrance of debris or rain in to the vent, it also provides low ... Mr. Heater F260550 Big Maxx MHU50NG Natural Gas Unit Heater,Black. ... DuraVent Vent Unit Heater Kit - 4in. Horizontal, Model# 4UHK-KVNT. Share: Found a lower price ...Shop Mr. Heater at Lowe's Canada online store. Compare products, read reviews & get the best deals! ... Mr. Heater Enerco Vertical Vent Kit - 4-in - Aluminum. Item ...FFXWTSF Portable AC Window Vent Kit 5.9” Coupler Adjustable Vertical Horizontal. $29.97. Free shipping. DuraVent Vent Unit Heater Kit — 4in. Horizontal, Model# 810006013 (Q-26) Mr. Heater. Contractor 125,000 BTU Forced Air Propane Space Heater with 10 ft. Hose and Regulator ... Mr. Heater. 30,000 BTU Vent Free Blue Flame Natural Gas Heater ... Category 1 horizontal 4 in vent kit for use with Mr. Heater Big Maxx or Heatstar by Enerco brand unit heaters ranging from 50,000, 80,000, and 125,000 BTUs. Stainless steel 4 in sealed ducting meets new category 3 certifications, Includes: 4 in x 6-19 in adjustable pipe, 4 in x 12 in vent pipe, 4 in 45-degree elbow, 4 in wall thimble, 4 in ...Shop mr. heater category 3 horizontal 6 in vent kit for big maxx heaters in the pellet stoves section of Lowes.comCategory 1 horizontal 4 in vent kit for use with Mr. Heater Big Maxx or Heatstar by Enerco brand unit heaters ranging from 50,000, 80,000, and 125,000 BTUs. Stainless steel 4 in sealed ducting meets new category 3 certifications, Includes: 4 in x 6-19 in adjustable pipe, 4 in x 12 in vent pipe, 4 in 45-degree elbow, 4 in wall thimble, 4 in ... Description. The Mr. Heater Big Maxx 50,000 BTU unit heater will turn your garage or barn into a work space you can use all year-round. Uses a built-in high velocity electric fan to pull cool air in and across the heat exchanger, then forces warm, comfortable air out. Its low profile design requires only a 10 ft minimum ceiling height and 1 in ...Category III 4in Stainless Steel Horizontal Vent Kit. $428.59. Add to Wish List. Add to Cart. ... COPYRIGHT MR. HEATER 2020. Enerco Group Inc / Mr. Heater 4560 West ... Shop Mr. Heater at Lowe's Canada online store. Compare products, read reviews & get the best deals! ... Mr. Heater Enerco Vertical Vent Kit - 4-in - Aluminum. Item ... Mr. Heater. Contractor 125,000 BTU Forced Air Propane Space Heater with 10 ft. Hose and Regulator ... Mr. Heater. 30,000 BTU Vent Free Blue Flame Natural Gas Heater ... Mr. Heater Big Maxx Silver Wall-mounted Garage Heater Vent Kit. The category 1 vertical 4 in vent kit provides class 1 single wall B-vent ducting for Mr. Heater Big Maxx unit heaters, ranging from 50,000, 80,000, and 125,000 BTUs. Complies with US standard (UL441) and Canadian standard (S605). Designed for vertical installation only.EZ Pro Single Zone 24000-BTU 18 SEER Ductless Mini Split Air Conditioner and Heater with 16-ft Installation Kit. Model # EZPRO-24-HP-23016. Find My Store. for pricing and availability. 2. MRCOOL. DIY Series Dual Zone 27000-BTU 22 SEER Ductless Mini Split Air Conditioner and Heater with 25,25-ft Installation Kit. Find many great new & used options and get the best deals for 4"Vertical Venting Kit Mr. Heater,Big Maxx , Hot Dawg, modine gas heater vent at the best online prices at eBay! Free shipping for many products!Easily hook up your Mr. Heater Vent Free heater to a bulk propane tank using the Remote Propane Vent Free Installation Kit. The kit features a 2 stage regulator, hand wheel, 12 ft hose assembly, 3/8 in. MP x 3/8 in. MF Fitting, and a 3/8 in. Female thread x 3/8 in. Male Street Elbow.
Easily hook up your Mr. Heater Vent Free heater to a bulk propane tank using the Remote Propane Vent Free Installation Kit. The kit features a 2 stage regulator, hand wheel, 12 ft hose assembly, 3/8 in. MP x 3/8 in. MF Fitting, and a 3/8 in. Female thread x 3/8 in. Male Street Elbow.. Why domino
Product Info for Mr. Heater Horizontal 4inch Vent Kit. The Horizontal 4" Vent Kit is for Mr. Heater Big Maxx MHU50, MHU80 & MHU125 models. Complies with Canadian Standard (S636) & US Standard (UL1738). For horizontal installation only. Includes: 4" x 6"-19" adjustable pipe, 4" x 12" vent pipe, 4" 45 elbow, 4" wall thimble, 4" termination tee, 4 ...Overview. Kit includes: round horizontal cap, 90° elbow, wall strap, five 12” pipe lengths, tee with clean-out tee cap, wall thimble, appliance adapter. 4” kit includes a 3”-4” appliance adapter/increaser. DuraVent’s PelletVent installation kits include all the parts you need foray “out” through-the-wall style installation. Mr. Heater Big Maxx Natural Gas Garage/Workshop Unit Heater — 50,000 BTU, LP Conversion Kit, Model# F260550. Item # 27457. $499.99. Reg $549.99 Save $50.00. Shipping: Free shipping - Available now. See Shipping Options. Store Pickup: Not Available.Saf-T Vent® Model EZ Seal/EZ 316 . Single Wall . Gas Vent Connector . Chimney Liner & Special Gas Vent (USA) / Type BH Vent Class I/II (Canada) For Venting Residential, Commercial & Industrial Appliances . Category I, II, III & IV Appliances . 3”-5” Diameter Vent for use on Positive, Neutral and Negative . Pressures up to 9” W.C. Mr. Heater Big Maxx Silver Wall-mounted Garage Heater Vent Kit. The category 1 vertical 4 in vent kit provides class 1 single wall B-vent ducting for Mr. Heater Big Maxx unit heaters, ranging from 50,000, 80,000, and 125,000 BTUs. Complies with US standard (UL441) and Canadian standard (S605). Designed for vertical installation only.HE and HE+ non-condensing horizontal termination vent kit. For use with Rinnai high efficiency Tankless water heaters. Concentric venting reduces install time and costs, allows for secure connection and ease of assembly/adjustment Mr. Heater. 30,000 BTU Vent Free Blue Flame Natural Gas Heater. Add to Cart. Compare. Exclusive. More Options Available $ 239. 00 (236) Model# MHC125FAV. Mr. Heater. Mr. Heater Big Maxx Silver Wall-mounted Garage Heater Vent Kit. The category 1 vertical 4 in vent kit provides class 1 single wall B-vent ducting for Mr. Heater Big Maxx unit heaters, ranging from 50,000, 80,000, and 125,000 BTUs. Complies with US standard (UL441) and Canadian standard (S605). Designed for vertical installation only.Item # 46677. Model # F202858. Get Pricing and Availability. Use Current Location. Universal ventilation kit for the Mr. Heater Big Maxx garage heater. Adapter included for compatibility with 3" pipe. This item is no longer sold on Lowes.com. Shop Mr. Heater 80000-BTU Forced-air Garage Heater (Propane or Natural Gas)undefined at Lowe's.com. The Mr. Heater Big Maxx 80,000 BTU unit heater will turn your garage or barn into a work space you can use all year-round. Uses a built-in high velocityMr. Heater. Contractor 125,000 BTU Forced Air Propane Space Heater with 10 ft. Hose and Regulator ... Mr. Heater. 30,000 BTU Vent Free Blue Flame Natural Gas Heater ... Product Info for Mr. Heater Horizontal 4inch Vent Kit. The Horizontal 4" Vent Kit is for Mr. Heater Big Maxx MHU50, MHU80 & MHU125 models. Complies with Canadian Standard (S636) & US Standard (UL1738). For horizontal installation only. Includes: 4" x 6"-19" adjustable pipe, 4" x 12" vent pipe, 4" 45 elbow, 4" wall thimble, 4" termination tee, 4 ...Mr. Heater Big Maxx Silver Wall-mounted Garage Heater Vent Kit. The category 1 vertical 4 in vent kit provides class 1 single wall B-vent ducting for Mr. Heater Big Maxx unit heaters, ranging from 50,000, 80,000, and 125,000 BTUs. Complies with US standard (UL441) and Canadian standard (S605). Designed for vertical installation only. Mr. Heater F260550 Big Maxx MHU50NG Natural Gas Unit Heater,Black. ... DuraVent Vent Unit Heater Kit - 4in. Horizontal, Model# 4UHK-KVNT. Share: Found a lower price ...Shop Mr. Heater Big Maxx 4-in Horizontal Residential Adapter, B-Vent Pipe, Vent Pipe, Elbow, Wall Thimble, Roof Flashing, Storm Collar, Vent Capundefined at Lowe's.com. New cat III SS sealed 4-in horizontal ducting for unit heaters..