{"product_id":"dometic-dfmdh35111-medium-rv-furnace-35-000-btu-lp-12v","title":"Dometic DFMDH35111 Medium RV Furnace | 35,000 BTU | LP | 12V | REQUIRES DOOR","description":"\u003cp\u003eReplace or upgrade your RV furnace with the \u003cstrong\u003eDometic DFMDH35111 Medium Furnace (Part 9610007792)\u003c\/strong\u003e — a \u003cstrong\u003e35,000 BTU LP gas furnace in a compact 16-1\/2\" × 7\" × 20\" footprint\u003c\/strong\u003e, built for RVs needing solid mid-range heating output in a tight install space. Available at The RV Surplus.\u003c\/p\u003e\n\u003ch3\u003e⭐ Key Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBTU Input\u003c\/th\u003e\n\u003ctd\u003e35,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBTU Output\u003c\/th\u003e\n\u003ctd\u003e25,840\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Source\u003c\/th\u003e\n\u003ctd\u003eLP (propane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eElectrical\u003c\/th\u003e\n\u003ctd\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAmp Draw\u003c\/th\u003e\n\u003ctd\u003e11.1 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWatts\u003c\/th\u003e\n\u003ctd\u003e132\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e16-1\/2\" W × 7\" H × 20\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDuct Collars\u003c\/th\u003e\n\u003ctd\u003e3 included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e⭐ Replaces DFMD35111\u003c\/h3\u003e\n\u003cp\u003eThe DFMDH35111 is the \u003cstrong\u003ecurrent factory replacement for the older DFMD35111\u003c\/strong\u003e. If your parts list or furnace tag calls out DFMD35111, this is the correct supersession.\u003c\/p\u003e\n\u003ch3\u003e⚠️ Sold Separately — Order With Your Furnace\u003c\/h3\u003e\n\u003cp\u003eThis furnace does NOT ship with a door or thermostat. You'll likely need to order one or more of these at the same time:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9610008133\u003c\/strong\u003e — Thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e33011\u003c\/strong\u003e — Furnace Door, Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e33057\u003c\/strong\u003e — Furnace Door, White\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePick the door color that matches your coach exterior.\u003c\/p\u003e\n\u003ch3\u003e⭐ 3 Duct Collars Included\u003c\/h3\u003e\n\u003cp\u003eThree duct collars ship with the furnace — \u003cstrong\u003esupports a 3-duct distribution layout out of the box\u003c\/strong\u003e. If your coach uses fewer ducts, cap the unused collars; if it uses more, source additional collars separately.\u003c\/p\u003e\n\u003ch3\u003e⭐ 12V DC Electrical — Know the Draw\u003c\/h3\u003e\n\u003cp\u003eAt \u003cstrong\u003e11.1 amps \/ 132 watts\u003c\/strong\u003e, the DFMDH35111 pulls real current from your 12V battery. During extended cold-weather use with the furnace cycling frequently, this is often the \u003cstrong\u003esingle largest 12V load\u003c\/strong\u003e in the coach:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm battery capacity before extended boondocking in winter conditions\u003c\/li\u003e\n\u003cli\u003eA weak battery presents as a furnace that lights briefly and shuts off, or won't light at all\u003c\/li\u003e\n\u003cli\u003eKeep battery terminals clean and connections tight — voltage drop at the furnace reads as a bad board\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e⚠️ Before Calling It a Furnace Failure\u003c\/h3\u003e\n\u003cp\u003eIf a new or existing furnace won't light, work through the basics first:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLP gas supply\u003c\/strong\u003e — tank valve open, regulator working, lines bled of air\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12V battery voltage AT the furnace\u003c\/strong\u003e — not just at the battery (long wire runs cause drop)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermostat calling for heat\u003c\/strong\u003e — verify with a jumper at the furnace terminals if in doubt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReturn air blockage\u003c\/strong\u003e — the furnace needs airflow to prove the sail switch and allow ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior vents clear\u003c\/strong\u003e — wasps, spider webs, and debris block combustion and exhaust\u003c\/li\u003e\n\u003cli\u003eListen for the \u003cstrong\u003esequence of events on a call for heat\u003c\/strong\u003e: fan starts → sail switch closes → gas valve opens → spark → flame → steady run. Where it stops narrows the fault.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e⚠️ Install Considerations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFurnace must be installed per Dometic's install manual\u003c\/strong\u003e — clearances, venting, and gas connections are safety critical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak-test all LP connections\u003c\/strong\u003e with soapy water before firing the unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify proper exhaust clearances\u003c\/strong\u003e at the exterior vent — blocked exhaust creates CO risk\u003c\/li\u003e\n\u003cli\u003eIf you're not experienced with LP gas appliances, have a qualified RV technician handle the install\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e(1) Dometic DFMDH35111 medium furnace\u003c\/li\u003e\n\u003cli\u003e(3) Duct collars\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNOT included (sold separately):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace door (\u003cstrong\u003e33011 black\u003c\/strong\u003e or \u003cstrong\u003e33057 white\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003eThermostat (\u003cstrong\u003e9610008133\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003eLP gas supply fittings and flex line\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e2-Year Manufacturer Warranty\u003c\/h3\u003e\n\u003cp\u003eBacked by Dometic's \u003cstrong\u003e2-year manufacturer warranty\u003c\/strong\u003e. Register with Dometic after install to activate.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Dometic\u003c\/li\u003e\n\u003cli\u003eModel: DFMDH35111\u003c\/li\u003e\n\u003cli\u003ePart Number: 9610007792\u003c\/li\u003e\n\u003cli\u003eReplaces: DFMD35121\u003c\/li\u003e\n\u003cli\u003eSeries: Medium Furnace\u003c\/li\u003e\n\u003cli\u003eBTU Input: 35,000\u003c\/li\u003e\n\u003cli\u003eBTU Output: 25,840\u003c\/li\u003e\n\u003cli\u003eFuel: LP (propane)\u003c\/li\u003e\n\u003cli\u003eElectrical: 12V DC\u003c\/li\u003e\n\u003cli\u003eAmp Draw: 11.1 A\u003c\/li\u003e\n\u003cli\u003eWatts: 132\u003c\/li\u003e\n\u003cli\u003eDimensions: 16-1\/2\" W × 7\" H × 20\" D\u003c\/li\u003e\n\u003cli\u003eDuct Collars: 3 included\u003c\/li\u003e\n\u003cli\u003eDoor: NOT included (order 33011 black or 33057 white separately)\u003c\/li\u003e\n\u003cli\u003eThermostat: NOT included (order 9610008133 separately)\u003c\/li\u003e\n\u003cli\u003eWarranty: 2-year manufacturer\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Dometic","offers":[{"title":"Default Title","offer_id":58747474444591,"sku":"9610007792","price":1993.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/7663\/0063\/files\/dometic_dfm_9108923309_61431_11_ecee92d6-2fe4-4e83-9173-ad2722429db0.webp?v=1793298080","url":"https:\/\/thervsurplus.com\/en-ca\/products\/dometic-dfmdh35111-medium-rv-furnace-35-000-btu-lp-12v","provider":"The RV Surplus","version":"1.0","type":"link"}