{"product_id":"us-stove-hb1520-hot-blast-3-500-sq-ft-wood-furnace-180-000-btu","title":"US Stove HB1520 Hot Blast 3,500 Sq Ft Wood Furnace, 180,000 BTU","description":"\u003cp\u003eThe Hot Blast HB1520 is not a room heater — it is a furnace, and it is meant to tie into the ductwork you already have. Up to 180,000 BTU and 3,500 square feet, with twin 500 CFM blowers pushing heated air into your existing plenum so the whole house benefits rather than one room.\u003c\/p\u003e\u003cp\u003eThe firebox is 3.95 cubic feet and swallows logs up to 23 inches, which is the practical difference between loading it twice a day and loading it constantly. It runs as a standalone wood furnace or in parallel with a gas or oil unit as a way to cut fuel bills through the winter.\u003c\/p\u003e\u003ch3\u003eHow it ties into your house\u003c\/h3\u003e\u003cp\u003eThe HB1520 is designed to connect to existing ductwork, which is what separates a furnace from a stove. Twin 500 CFM blowers move heated air into the plenum and out through the registers you already have, so you are heating the whole house on one fire rather than warming the room the appliance happens to sit in. It can run as the primary heat source or alongside an existing gas or oil furnace.\u003c\/p\u003e\u003ch3\u003eLoading and ash\u003c\/h3\u003e\u003cp\u003e3.95 cubic feet of firebox and a 23 inch log capacity is what makes this practical to live with — realistically two loads a day rather than constant tending. A large ash drawer pulls out from the front so you are not shovelling out the firebox. Secondary combustion keeps it to 0.13 lb\/mmBtu with an EPA-verified output range of 15,997 to 53,042 BTU\/hr.\u003c\/p\u003e\u003ch3\u003eInstallation notes\u003c\/h3\u003e\u003cp\u003eThis is a 585 lb appliance and it is \u003cstrong\u003enot approved for mobile homes\u003c\/strong\u003e. Ducting, electrical for the blowers, and flue connection are a job for a qualified installer — budget for that alongside the unit. Certified to UL-391 and CSA B366.1.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax BTU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEPA Verified Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15,997 – 53,042 BTU\/hr.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeating Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 3,500 sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEfficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e70%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEmission Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.13 lb\/mmBtu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFirebox Volume (cu ft)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.95 Cu Ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Log Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 23 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlower Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAsh Drawer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight (in)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth (in)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25.375\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDepth (in)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e54.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUnit Weight (lbs)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e585\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterials\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed, Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMobile Home Approved\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePFS report number 22-808; Certified to UL-391-2006 (R2019); Certified to CSA B366.1-11 (R2020) and CSA B415.1:22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eChina\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eDocumentation\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.usstove.com\/wp-content\/uploads\/2025\/06\/HB1520-Owners-Manual-2025.pdf\" target=\"_blank\" rel=\"noopener\"\u003eOwner's Manual (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.usstove.com\/wp-content\/uploads\/2023\/03\/85815-Furnace-Warranty-EN_FR-1.pdf\" target=\"_blank\" rel=\"noopener\"\u003eWarranty Information (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e⚠️ California Prop 65 Warning\u003c\/h3\u003e\u003cp\u003eThis product can expose you to chemicals including carbon monoxide, which is known to the State of California to cause cancer, birth defects, and\/or other reproductive harm. For more information, go to www.P65warnings.ca.gov\u003c\/p\u003e","brand":"US Stove","offers":[{"title":"Default Title","offer_id":50571246698735,"sku":"HB1520","price":2609.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0533\/9683\/2421\/files\/HB1520-front-jpg.webp?v=1787607656","url":"https:\/\/fyredirect.com\/products\/us-stove-hb1520-hot-blast-3-500-sq-ft-wood-furnace-180-000-btu","provider":"Fyre Direct","version":"1.0","type":"link"}