{"product_id":"dometic™-dfmdh30121-rv-furnace-30-000-btu-lp-gas-bottom-discharge-12v-dc","title":"Dometic™ DFMDH30121 RV Furnace – 30,000 BTU – LP Gas – Bottom Discharge – 12V DC","description":"\u003ch1 data-end=\"292\" data-start=\"208\"\u003eDometic™ DFMDH30121 RV Furnace – 30,000 BTU – LP Gas – Bottom Discharge – 12V DC\u003c\/h1\u003e\n\u003cp data-end=\"360\" data-start=\"293\"\u003e\u003cstrong data-end=\"360\" data-start=\"293\"\u003eDFM Series | Hall Effect Sensor | Doorless Design | Medium Size\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"690\" data-start=\"362\"\u003e\u003cstrong data-end=\"372\" data-start=\"362\"\u003eModel:\u003c\/strong\u003e DFMDH30121\u003cbr data-end=\"386\" data-start=\"383\"\u003e\u003cstrong data-end=\"397\" data-start=\"386\"\u003eSeries:\u003c\/strong\u003e DFM “H” Series\u003cbr data-end=\"415\" data-start=\"412\"\u003e\u003cstrong data-end=\"429\" data-start=\"415\"\u003eFuel Type:\u003c\/strong\u003e LP Gas (Propane)\u003cbr data-end=\"449\" data-start=\"446\"\u003e\u003cstrong data-end=\"464\" data-start=\"449\"\u003eBTU Output:\u003c\/strong\u003e 30,000 BTU\u003cbr data-end=\"478\" data-start=\"475\"\u003e\u003cstrong data-end=\"488\" data-start=\"478\"\u003eStage:\u003c\/strong\u003e Single Stage\u003cbr data-end=\"504\" data-start=\"501\"\u003e\u003cstrong data-end=\"516\" data-start=\"504\"\u003eVoltage:\u003c\/strong\u003e 12 Volt DC\u003cbr data-end=\"530\" data-start=\"527\"\u003e\u003cstrong data-end=\"549\" data-start=\"530\"\u003eDischarge Type:\u003c\/strong\u003e Bottom Discharge\u003cbr data-end=\"569\" data-start=\"566\"\u003e\u003cstrong data-end=\"588\" data-start=\"569\"\u003eGas Connection:\u003c\/strong\u003e Rear Gas Manifold\u003cbr data-end=\"609\" data-start=\"606\"\u003e\u003cstrong data-end=\"627\" data-start=\"609\"\u003eExterior Door:\u003c\/strong\u003e Not Required (Doorless Model)\u003cbr data-end=\"660\" data-start=\"657\"\u003e\u003cstrong data-end=\"690\" data-start=\"660\"\u003eThermostat Sold Separately\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"690\" data-start=\"362\"\u003e\u003cstrong data-end=\"690\" data-start=\"660\"\u003e2-Year Limited Manufacturer Warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-end=\"695\" data-start=\"692\"\u003e\n\u003ch2 data-end=\"716\" data-start=\"697\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-end=\"901\" data-start=\"718\"\u003eThe \u003cstrong data-end=\"745\" data-start=\"722\"\u003eDometic™ DFMDH30121\u003c\/strong\u003e is a powerful \u003cstrong data-end=\"792\" data-start=\"760\"\u003e30,000 BTU LP gas RV furnace\u003c\/strong\u003e designed for medium-sized heating applications requiring bottom-discharge ducting and flexible installation.\u003c\/p\u003e\n\u003cp data-end=\"1261\" data-start=\"903\"\u003eThis model is part of Dometic’s advanced \u003cstrong data-end=\"962\" data-start=\"944\"\u003eDFM “H” Series\u003c\/strong\u003e, which features an \u003cstrong data-end=\"1036\" data-start=\"982\"\u003eelectronic Hall Effect airflow verification system\u003c\/strong\u003e instead of a traditional mechanical sail switch. The Hall sensor electronically monitors blower motor rotation before ignition, improving reliability and reducing service issues caused by stuck or contaminated sail switches.\u003c\/p\u003e\n\u003cp data-end=\"1502\" data-start=\"1263\"\u003eThe \u003cstrong data-end=\"1303\" data-start=\"1267\"\u003eDFMDH30121 is a doorless furnace\u003c\/strong\u003e, meaning an exterior access door is not required for installation. This eliminates the need to cut a large exterior opening in your RV sidewall — making it one of the easiest furnaces to install in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"1523\" data-start=\"1506\"\u003eVan conversions\u003c\/li\u003e\n\u003cli data-end=\"1549\" data-start=\"1526\"\u003eSmall travel trailers\u003c\/li\u003e\n\u003cli data-end=\"1567\" data-start=\"1552\"\u003eTruck campers\u003c\/li\u003e\n\u003cli data-end=\"1582\" data-start=\"1570\"\u003eTiny homes\u003c\/li\u003e\n\u003cli data-end=\"1605\" data-start=\"1585\"\u003eIce fishing houses\u003c\/li\u003e\n\u003cli data-end=\"1626\" data-start=\"1608\"\u003eCustom RV builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1727\" data-start=\"1628\"\u003e⚠ \u003cstrong data-end=\"1644\" data-start=\"1630\"\u003eImportant:\u003c\/strong\u003e Always measure your existing furnace cut-out to ensure proper fit before ordering.\u003c\/p\u003e\n\u003chr data-end=\"1732\" data-start=\"1729\"\u003e\n\u003ch1 data-end=\"1748\" data-start=\"1734\"\u003eKey Features\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli data-end=\"1781\" data-start=\"1752\"\u003e30,000 BTU heating capacity\u003c\/li\u003e\n\u003cli data-end=\"1812\" data-start=\"1784\"\u003eLP gas (propane) operation\u003c\/li\u003e\n\u003cli data-end=\"1837\" data-start=\"1815\"\u003eSingle-stage heating\u003c\/li\u003e\n\u003cli data-end=\"1880\" data-start=\"1840\"\u003eBottom discharge airflow configuration\u003c\/li\u003e\n\u003cli data-end=\"1905\" data-start=\"1883\"\u003e12 Volt DC operation\u003c\/li\u003e\n\u003cli data-end=\"1981\" data-start=\"1908\"\u003e\u003cstrong data-end=\"1979\" data-start=\"1908\"\u003eHall Effect airflow verification system (no mechanical sail switch)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-end=\"2016\" data-start=\"1984\"\u003eBuilt-In Soft Start technology\u003c\/li\u003e\n\u003cli data-end=\"2049\" data-start=\"2019\"\u003eRear gas manifold connection\u003c\/li\u003e\n\u003cli data-end=\"2082\" data-start=\"2052\"\u003eDoorless installation design\u003c\/li\u003e\n\u003cli data-end=\"2113\" data-start=\"2085\"\u003eThermostat sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2118\" data-start=\"2115\"\u003e\n\u003ch1 data-end=\"2136\" data-start=\"2120\"\u003eSpecifications\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli data-end=\"2163\" data-start=\"2140\"\u003e\n\u003cstrong data-end=\"2150\" data-start=\"2140\"\u003eModel:\u003c\/strong\u003e DFMDH30121\u003c\/li\u003e\n\u003cli data-end=\"2192\" data-start=\"2166\"\u003e\n\u003cstrong data-end=\"2177\" data-start=\"2166\"\u003eSeries:\u003c\/strong\u003e DFM H Series\u003c\/li\u003e\n\u003cli data-end=\"2223\" data-start=\"2195\"\u003e\n\u003cstrong data-end=\"2210\" data-start=\"2195\"\u003eBTU Rating:\u003c\/strong\u003e 30,000 BTU\u003c\/li\u003e\n\u003cli data-end=\"2249\" data-start=\"2226\"\u003e\n\u003cstrong data-end=\"2240\" data-start=\"2226\"\u003eFuel Type:\u003c\/strong\u003e LP Gas\u003c\/li\u003e\n\u003cli data-end=\"2285\" data-start=\"2252\"\u003e\n\u003cstrong data-end=\"2270\" data-start=\"2252\"\u003eHeating Stage:\u003c\/strong\u003e Single Stage\u003c\/li\u003e\n\u003cli data-end=\"2313\" data-start=\"2288\"\u003e\n\u003cstrong data-end=\"2300\" data-start=\"2288\"\u003eVoltage:\u003c\/strong\u003e 12 Volt DC\u003c\/li\u003e\n\u003cli data-end=\"2344\" data-start=\"2316\"\u003e\n\u003cstrong data-end=\"2335\" data-start=\"2316\"\u003eDischarge Type:\u003c\/strong\u003e Bottom\u003c\/li\u003e\n\u003cli data-end=\"2382\" data-start=\"2347\"\u003e\n\u003cstrong data-end=\"2366\" data-start=\"2347\"\u003eGas Connection:\u003c\/strong\u003e Rear Manifold\u003c\/li\u003e\n\u003cli data-end=\"2411\" data-start=\"2385\"\u003e\n\u003cstrong data-end=\"2395\" data-start=\"2385\"\u003eWidth:\u003c\/strong\u003e 16-1\/2 inches\u003c\/li\u003e\n\u003cli data-end=\"2436\" data-start=\"2414\"\u003e\n\u003cstrong data-end=\"2425\" data-start=\"2414\"\u003eHeight:\u003c\/strong\u003e 7 inches\u003c\/li\u003e\n\u003cli data-end=\"2461\" data-start=\"2439\"\u003e\n\u003cstrong data-end=\"2449\" data-start=\"2439\"\u003eDepth:\u003c\/strong\u003e 20 inches\u003c\/li\u003e\n\u003cli data-end=\"2508\" data-start=\"2464\"\u003e\n\u003cstrong data-end=\"2487\" data-start=\"2464\"\u003eAirflow Monitoring:\u003c\/strong\u003e Hall Effect Sensor\u003c\/li\u003e\n\u003cli data-end=\"2532\" data-start=\"2511\"\u003e\n\u003cstrong data-end=\"2526\" data-start=\"2511\"\u003eSoft Start:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli data-end=\"2574\" data-start=\"2535\"\u003e\n\u003cstrong data-end=\"2569\" data-start=\"2535\"\u003eExterior Access Door Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli data-end=\"2606\" data-start=\"2577\"\u003e\n\u003cstrong data-end=\"2601\" data-start=\"2577\"\u003eThermostat Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2611\" data-start=\"2608\"\u003e\n\u003ch1 data-end=\"2650\" data-start=\"2613\"\u003eDoorless Installation – Pros \u0026amp; Cons\u003c\/h1\u003e\n\u003ch3 data-end=\"2691\" data-start=\"2652\"\u003eBenefits of Doorless Installation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"2729\" data-start=\"2694\"\u003eNo large cut required in sidewall\u003c\/li\u003e\n\u003cli data-end=\"2764\" data-start=\"2732\"\u003eCleaner RV exterior appearance\u003c\/li\u003e\n\u003cli data-end=\"2799\" data-start=\"2767\"\u003eMore flexible mounting options\u003c\/li\u003e\n\u003cli data-end=\"2841\" data-start=\"2802\"\u003eEasier installation in compact builds\u003c\/li\u003e\n\u003cli data-end=\"2890\" data-start=\"2844\"\u003eIdeal for van conversions and custom layouts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"2912\" data-start=\"2892\"\u003e⚠ Considerations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"2958\" data-start=\"2915\"\u003eServicing must be done from inside the RV\u003c\/li\u003e\n\u003cli data-end=\"2995\" data-start=\"2961\"\u003eNo exterior service access panel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"3113\" data-start=\"2997\"\u003eThis design makes the DFMDH30121 extremely versatile for non-traditional builds and space-constrained installations.\u003c\/p\u003e\n\u003chr data-end=\"3118\" data-start=\"3115\"\u003e\n\u003ch1 data-end=\"3152\" data-start=\"3120\"\u003eWhy Choose the DFM “H” Series?\u003c\/h1\u003e\n\u003cp data-end=\"3306\" data-start=\"3154\"\u003eTraditional RV furnaces use mechanical sail switches to confirm airflow. Over time, these can stick, get dirty, or cause intermittent ignition failures.\u003c\/p\u003e\n\u003cp data-end=\"3353\" data-start=\"3308\"\u003eThe \u003cstrong data-end=\"3334\" data-start=\"3312\"\u003eHall Effect system\u003c\/strong\u003e in the DFMDH30121:\u003c\/p\u003e\n\u003cp data-end=\"3504\" data-start=\"3355\"\u003e✔ Electronically verifies blower rotation\u003cbr data-end=\"3399\" data-start=\"3396\"\u003e✔ Improves ignition reliability\u003cbr data-end=\"3433\" data-start=\"3430\"\u003e✔ Reduces maintenance\u003cbr data-end=\"3457\" data-start=\"3454\"\u003e✔ Performs better in dusty or cold conditions\u003c\/p\u003e\n\u003cp data-end=\"3628\" data-start=\"3506\"\u003eCombined with Soft Start technology, it reduces electrical surge during startup — helping protect RV wiring and batteries.\u003c\/p\u003e\n\u003chr data-end=\"3633\" data-start=\"3630\"\u003e\n\u003ch1 data-end=\"3669\" data-start=\"3635\"\u003eFrequently Asked Questions (FAQ)\u003c\/h1\u003e\n\u003cp data-end=\"3807\" data-start=\"3671\"\u003e\u003cstrong data-end=\"3706\" data-start=\"3671\"\u003eQ: What does the “H” stand for?\u003c\/strong\u003e\u003cbr data-end=\"3709\" data-start=\"3706\"\u003eA: It indicates the furnace uses a Hall Effect airflow sensor instead of a mechanical sail switch.\u003c\/p\u003e\n\u003cp data-end=\"3901\" data-start=\"3809\"\u003e\u003cstrong data-end=\"3865\" data-start=\"3809\"\u003eQ: Does this model require an exterior furnace door?\u003c\/strong\u003e\u003cbr data-end=\"3868\" data-start=\"3865\"\u003eA: No. This is a doorless design.\u003c\/p\u003e\n\u003cp data-end=\"4002\" data-start=\"3903\"\u003e\u003cstrong data-end=\"3946\" data-start=\"3903\"\u003eQ: Where is the gas connection located?\u003c\/strong\u003e\u003cbr data-end=\"3949\" data-start=\"3946\"\u003eA: This model uses a rear gas manifold configuration.\u003c\/p\u003e\n\u003cp data-end=\"4118\" data-start=\"4004\"\u003e\u003cstrong data-end=\"4040\" data-start=\"4004\"\u003eQ: Does it include a thermostat?\u003c\/strong\u003e\u003cbr data-end=\"4043\" data-start=\"4040\"\u003eA: No. A compatible 12V furnace thermostat is required and sold separately.\u003c\/p\u003e\n\u003cp data-end=\"4218\" data-start=\"4120\"\u003e\u003cstrong data-end=\"4159\" data-start=\"4120\"\u003eQ: What does Bottom Discharge mean?\u003c\/strong\u003e\u003cbr data-end=\"4162\" data-start=\"4159\"\u003eA: Heated air flows downward into floor ducting systems.\u003c\/p\u003e\n\u003cp data-end=\"4396\" data-start=\"4220\"\u003e\u003cstrong data-end=\"4276\" data-start=\"4220\"\u003eQ: Is this compatible with traditional DFM cut-outs?\u003c\/strong\u003e\u003cbr data-end=\"4279\" data-start=\"4276\"\u003eA: It shares the same physical footprint as other medium DFM models, but always measure your cut-out before ordering.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47857599480049,"sku":null,"price":1279.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/301211.png?v=1772399752","url":"https:\/\/rvfurnaceguys.com\/products\/dometic%e2%84%a2-dfmdh30121-rv-furnace-30-000-btu-lp-gas-bottom-discharge-12v-dc","provider":"RV Furnace Guys","version":"1.0","type":"link"}