{"product_id":"dometic™-dfsdh20121-rv-furnace-20-000-btu-lp-gas-12v-dc","title":"Dometic™ DFSDH20121 RV Furnace – 20,000 BTU – LP Gas – 12V DC","description":"\u003ch1 data-start=\"217\" data-end=\"282\"\u003eDometic™ DFSDH20121 RV Furnace – 20,000 BTU – LP Gas – 12V DC\u003c\/h1\u003e\n\u003cp data-start=\"283\" data-end=\"378\"\u003e\u003cstrong data-start=\"283\" data-end=\"378\"\u003eDFS Series | Hall Effect Sensor | Outside Valve Manifold | Doorless Model | 2-Year Warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"380\" data-end=\"762\"\u003e\u003cstrong data-start=\"380\" data-end=\"390\"\u003eModel:\u003c\/strong\u003e DFSDH20121\u003cbr data-start=\"401\" data-end=\"404\"\u003e\u003cstrong data-start=\"404\" data-end=\"415\"\u003eSeries:\u003c\/strong\u003e DFS “H” Series\u003cbr data-start=\"430\" data-end=\"433\"\u003e\u003cstrong data-start=\"433\" data-end=\"447\"\u003eFuel Type:\u003c\/strong\u003e LP Gas (Propane)\u003cbr data-start=\"464\" data-end=\"467\"\u003e\u003cstrong data-start=\"467\" data-end=\"482\"\u003eBTU Output:\u003c\/strong\u003e 20,000 BTU\u003cbr data-start=\"493\" data-end=\"496\"\u003e\u003cstrong data-start=\"496\" data-end=\"514\"\u003eHeating Stage:\u003c\/strong\u003e Single Stage\u003cbr data-start=\"527\" data-end=\"530\"\u003e\u003cstrong data-start=\"530\" data-end=\"542\"\u003eVoltage:\u003c\/strong\u003e 12 Volt DC\u003cbr data-start=\"553\" data-end=\"556\"\u003e\u003cstrong data-start=\"556\" data-end=\"568\"\u003eDucting:\u003c\/strong\u003e Side or Bottom Discharge\u003cbr data-start=\"593\" data-end=\"596\"\u003e\u003cstrong data-start=\"596\" data-end=\"614\"\u003eConfiguration:\u003c\/strong\u003e Outside Valve Manifold \/ Less Door\u003cbr data-start=\"649\" data-end=\"652\"\u003e\u003cstrong data-start=\"652\" data-end=\"676\"\u003eElectronic Ignition:\u003c\/strong\u003e Yes\u003cbr data-start=\"680\" data-end=\"683\"\u003e\u003cstrong data-start=\"683\" data-end=\"701\"\u003eVent Assembly:\u003c\/strong\u003e Not Included\u003cbr data-start=\"714\" data-end=\"717\"\u003e\u003cstrong data-start=\"717\" data-end=\"762\"\u003eAccess Doors \u0026amp; Thermostat Sold Separately\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"764\" data-end=\"767\"\u003e\n\u003ch2 data-start=\"769\" data-end=\"788\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"790\" data-end=\"998\"\u003eThe \u003cstrong data-start=\"794\" data-end=\"817\"\u003eDometic™ DFSDH20121\u003c\/strong\u003e is a compact \u003cstrong data-start=\"831\" data-end=\"876\"\u003e20,000 BTU single-stage LP gas RV furnace\u003c\/strong\u003e designed for small RVs, van conversions, truck campers, and specialty builds requiring efficient heating in tight spaces.\u003c\/p\u003e\n\u003cp data-start=\"1000\" data-end=\"1318\"\u003eThis model is part of the modern \u003cstrong data-start=\"1033\" data-end=\"1051\"\u003eDFS “H” Series\u003c\/strong\u003e, utilizing an advanced \u003cstrong data-start=\"1075\" data-end=\"1118\"\u003eHall Effect airflow verification system\u003c\/strong\u003e instead of a traditional mechanical sail switch. The Hall sensor electronically monitors blower motor rotation prior to ignition, improving reliability and minimizing common airflow-related failures.\u003c\/p\u003e\n\u003cp data-start=\"1320\" data-end=\"1626\"\u003eThe DFSDH20121 features an \u003cstrong data-start=\"1347\" data-end=\"1399\"\u003eoutside valve manifold (less door configuration)\u003c\/strong\u003e, meaning it does not include an exterior access door or vent assembly. This allows greater installation flexibility and eliminates the need for a large sidewall cut-out — ideal for custom builds and non-traditional RV layouts.\u003c\/p\u003e\n\u003cp data-start=\"1628\" data-end=\"1789\"\u003e⚠ \u003cstrong data-start=\"1630\" data-end=\"1644\"\u003eImportant:\u003c\/strong\u003e Access doors, vent assembly, and thermostat are sold separately.\u003cbr data-start=\"1709\" data-end=\"1712\"\u003e⚠ Always measure your existing cut-out before ordering to confirm proper fit.\u003c\/p\u003e\n\u003chr data-start=\"1791\" data-end=\"1794\"\u003e\n\u003ch1 data-start=\"1796\" data-end=\"1810\"\u003eKey Features\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli data-start=\"1814\" data-end=\"1843\"\u003e20,000 BTU heating capacity\u003c\/li\u003e\n\u003cli data-start=\"1846\" data-end=\"1874\"\u003eLP Gas (propane) operation\u003c\/li\u003e\n\u003cli data-start=\"1877\" data-end=\"1906\"\u003eSingle-stage heating system\u003c\/li\u003e\n\u003cli data-start=\"1909\" data-end=\"1931\"\u003e12 Volt DC operation\u003c\/li\u003e\n\u003cli data-start=\"1934\" data-end=\"1962\"\u003eElectronic ignition system\u003c\/li\u003e\n\u003cli data-start=\"1965\" data-end=\"2031\"\u003e\u003cstrong data-start=\"1965\" data-end=\"2029\"\u003eHall Effect airflow verification (no mechanical sail switch)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"2034\" data-end=\"2072\"\u003eSide or bottom ducting compatibility\u003c\/li\u003e\n\u003cli data-start=\"2075\" data-end=\"2112\"\u003eSmall chassis footprint (12\" width)\u003c\/li\u003e\n\u003cli data-start=\"2115\" data-end=\"2153\"\u003eOutside valve manifold configuration\u003c\/li\u003e\n\u003cli data-start=\"2156\" data-end=\"2195\"\u003eDoorless (exterior door not included)\u003c\/li\u003e\n\u003cli data-start=\"2198\" data-end=\"2226\"\u003eVent assembly not included\u003c\/li\u003e\n\u003cli data-start=\"2229\" data-end=\"2257\"\u003eThermostat sold separately\u003c\/li\u003e\n\u003cli data-start=\"2260\" data-end=\"2300\"\u003e\u003cstrong data-start=\"2260\" data-end=\"2300\"\u003e2-Year Limited Manufacturer Warranty\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2302\" data-end=\"2305\"\u003e\n\u003ch1 data-start=\"2307\" data-end=\"2323\"\u003eSpecifications\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli data-start=\"2327\" data-end=\"2350\"\u003e\n\u003cstrong data-start=\"2327\" data-end=\"2337\"\u003eModel:\u003c\/strong\u003e DFSDH20121\u003c\/li\u003e\n\u003cli data-start=\"2353\" data-end=\"2379\"\u003e\n\u003cstrong data-start=\"2353\" data-end=\"2364\"\u003eSeries:\u003c\/strong\u003e DFS H Series\u003c\/li\u003e\n\u003cli data-start=\"2382\" data-end=\"2410\"\u003e\n\u003cstrong data-start=\"2382\" data-end=\"2397\"\u003eBTU Rating:\u003c\/strong\u003e 20,000 BTU\u003c\/li\u003e\n\u003cli data-start=\"2413\" data-end=\"2446\"\u003e\n\u003cstrong data-start=\"2413\" data-end=\"2431\"\u003eHeating Stage:\u003c\/strong\u003e Single Stage\u003c\/li\u003e\n\u003cli data-start=\"2449\" data-end=\"2472\"\u003e\n\u003cstrong data-start=\"2449\" data-end=\"2463\"\u003eFuel Type:\u003c\/strong\u003e LP Gas\u003c\/li\u003e\n\u003cli data-start=\"2475\" data-end=\"2500\"\u003e\n\u003cstrong data-start=\"2475\" data-end=\"2487\"\u003eVoltage:\u003c\/strong\u003e 12 Volt DC\u003c\/li\u003e\n\u003cli data-start=\"2503\" data-end=\"2540\"\u003e\n\u003cstrong data-start=\"2503\" data-end=\"2523\"\u003eDucting Options:\u003c\/strong\u003e Side or Bottom\u003c\/li\u003e\n\u003cli data-start=\"2543\" data-end=\"2565\"\u003e\n\u003cstrong data-start=\"2543\" data-end=\"2553\"\u003eWidth:\u003c\/strong\u003e 12 inches\u003c\/li\u003e\n\u003cli data-start=\"2568\" data-end=\"2590\"\u003e\n\u003cstrong data-start=\"2568\" data-end=\"2579\"\u003eHeight:\u003c\/strong\u003e 7 inches\u003c\/li\u003e\n\u003cli data-start=\"2593\" data-end=\"2615\"\u003e\n\u003cstrong data-start=\"2593\" data-end=\"2603\"\u003eDepth:\u003c\/strong\u003e 20 inches\u003c\/li\u003e\n\u003cli data-start=\"2618\" data-end=\"2658\"\u003e\n\u003cstrong data-start=\"2618\" data-end=\"2636\"\u003eIgnition Type:\u003c\/strong\u003e Electronic Ignition\u003c\/li\u003e\n\u003cli data-start=\"2661\" data-end=\"2705\"\u003e\n\u003cstrong data-start=\"2661\" data-end=\"2684\"\u003eAirflow Monitoring:\u003c\/strong\u003e Hall Effect Sensor\u003c\/li\u003e\n\u003cli data-start=\"2708\" data-end=\"2740\"\u003e\n\u003cstrong data-start=\"2708\" data-end=\"2735\"\u003eVent Assembly Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli data-start=\"2743\" data-end=\"2782\"\u003e\n\u003cstrong data-start=\"2743\" data-end=\"2777\"\u003eExterior Access Door Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli data-start=\"2785\" data-end=\"2814\"\u003e\n\u003cstrong data-start=\"2785\" data-end=\"2809\"\u003eThermostat Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli data-start=\"2817\" data-end=\"2869\"\u003e\n\u003cstrong data-start=\"2817\" data-end=\"2830\"\u003eWarranty:\u003c\/strong\u003e 2-Year Limited Manufacturer Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2871\" data-end=\"2874\"\u003e\n\u003ch1 data-start=\"2876\" data-end=\"2935\"\u003eOutside Valve Manifold \/ Less Door Design – What It Means\u003c\/h1\u003e\n\u003cp data-start=\"2937\" data-end=\"2984\"\u003eThis model is designed for installations where:\u003c\/p\u003e\n\u003cp data-start=\"2986\" data-end=\"3158\"\u003e✔ An exterior furnace door is not desired\u003cbr data-start=\"3027\" data-end=\"3030\"\u003e✔ A large sidewall cut is not practical\u003cbr data-start=\"3069\" data-end=\"3072\"\u003e✔ Flexible positioning is required\u003cbr data-start=\"3106\" data-end=\"3109\"\u003e✔ Custom interior servicing access is preferred\u003c\/p\u003e\n\u003ch3 data-start=\"3160\" data-end=\"3172\"\u003eBenefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"3175\" data-end=\"3196\"\u003eCleaner RV exterior\u003c\/li\u003e\n\u003cli data-start=\"3199\" data-end=\"3233\"\u003eGreater installation flexibility\u003c\/li\u003e\n\u003cli data-start=\"3236\" data-end=\"3300\"\u003eIdeal for vans, compact builds, ice houses, and custom layouts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"3302\" data-end=\"3320\"\u003eConsiderations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"3323\" data-end=\"3368\"\u003eFurnace must be serviced from inside the RV\u003c\/li\u003e\n\u003cli data-start=\"3371\" data-end=\"3414\"\u003eVent assembly must be selected separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3416\" data-end=\"3419\"\u003e\n\u003ch1 data-start=\"3421\" data-end=\"3453\"\u003eWhy Choose the DFS “H” Series?\u003c\/h1\u003e\n\u003cp data-start=\"3455\" data-end=\"3520\"\u003eOlder small furnaces rely on mechanical sail switches, which can:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"3524\" data-end=\"3547\"\u003eBecome dirty or stuck\u003c\/li\u003e\n\u003cli data-start=\"3550\" data-end=\"3588\"\u003eCause intermittent ignition failures\u003c\/li\u003e\n\u003cli data-start=\"3591\" data-end=\"3618\"\u003eRequire periodic cleaning\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3620\" data-end=\"3744\"\u003eThe \u003cstrong data-start=\"3624\" data-end=\"3646\"\u003eHall Effect system\u003c\/strong\u003e in the DFSDH20121 electronically confirms airflow through motor rotation detection, resulting in:\u003c\/p\u003e\n\u003cp data-start=\"3746\" data-end=\"3874\"\u003e✔ Faster, more reliable ignition\u003cbr data-start=\"3778\" data-end=\"3781\"\u003e✔ Reduced maintenance\u003cbr data-start=\"3802\" data-end=\"3805\"\u003e✔ Improved long-term durability\u003cbr data-start=\"3836\" data-end=\"3839\"\u003e✔ Better cold-weather reliability\u003c\/p\u003e\n\u003chr data-start=\"3876\" data-end=\"3879\"\u003e\n\u003ch1 data-start=\"3881\" data-end=\"3901\"\u003eIdeal Applications\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli data-start=\"3905\" data-end=\"3922\"\u003eVan conversions\u003c\/li\u003e\n\u003cli data-start=\"3925\" data-end=\"3940\"\u003eTruck campers\u003c\/li\u003e\n\u003cli data-start=\"3943\" data-end=\"3966\"\u003eSmall travel trailers\u003c\/li\u003e\n\u003cli data-start=\"3969\" data-end=\"3987\"\u003eOverlanding rigs\u003c\/li\u003e\n\u003cli data-start=\"3990\" data-end=\"4002\"\u003eTiny homes\u003c\/li\u003e\n\u003cli data-start=\"4005\" data-end=\"4025\"\u003eIce fishing houses\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4027\" data-end=\"4099\"\u003eIts compact 12-inch width makes it ideal for tight furnace compartments.\u003c\/p\u003e\n\u003chr data-start=\"4101\" data-end=\"4104\"\u003e\n\u003ch1 data-start=\"4106\" data-end=\"4140\"\u003eFrequently Asked Questions (FAQ)\u003c\/h1\u003e\n\u003cp data-start=\"4142\" data-end=\"4274\"\u003e\u003cstrong data-start=\"4142\" data-end=\"4177\"\u003eQ: What does the “H” designate?\u003c\/strong\u003e\u003cbr data-start=\"4177\" data-end=\"4180\"\u003eA: It indicates a Hall Effect airflow verification system instead of a mechanical sail switch.\u003c\/p\u003e\n\u003cp data-start=\"4276\" data-end=\"4370\"\u003e\u003cstrong data-start=\"4276\" data-end=\"4326\"\u003eQ: Does this furnace include an exterior door?\u003c\/strong\u003e\u003cbr data-start=\"4326\" data-end=\"4329\"\u003eA: No. This is a less-door configuration.\u003c\/p\u003e\n\u003cp data-start=\"4372\" data-end=\"4466\"\u003e\u003cstrong data-start=\"4372\" data-end=\"4409\"\u003eQ: Is the vent assembly included?\u003c\/strong\u003e\u003cbr data-start=\"4409\" data-end=\"4412\"\u003eA: No. The vent assembly must be purchased separately.\u003c\/p\u003e\n\u003cp data-start=\"4468\" data-end=\"4562\"\u003e\u003cstrong data-start=\"4468\" data-end=\"4509\"\u003eQ: Does this use electronic ignition?\u003c\/strong\u003e\u003cbr data-start=\"4509\" data-end=\"4512\"\u003eA: Yes, this furnace features electronic ignition.\u003c\/p\u003e\n\u003cp data-start=\"4564\" data-end=\"4662\"\u003e\u003cstrong data-start=\"4564\" data-end=\"4597\"\u003eQ: What warranty is included?\u003c\/strong\u003e\u003cbr data-start=\"4597\" data-end=\"4600\"\u003eA: This model includes a 2-year limited manufacturer warranty.\u003c\/p\u003e\n\u003cp data-start=\"4664\" data-end=\"4784\"\u003e\u003cstrong data-start=\"4664\" data-end=\"4715\"\u003eQ: Can it be ducted from either side or bottom?\u003c\/strong\u003e\u003cbr data-start=\"4715\" data-end=\"4718\"\u003eA: Yes. It supports both side and bottom discharge configurations.\u003c\/p\u003e","brand":"RV Furnace Guys","offers":[{"title":"Default Title","offer_id":47857627594993,"sku":null,"price":1119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4941\/0289\/files\/201211.png?v=1772403328","url":"https:\/\/rvfurnaceguys.com\/products\/dometic%e2%84%a2-dfsdh20121-rv-furnace-20-000-btu-lp-gas-12v-dc","provider":"RV Furnace Guys","version":"1.0","type":"link"}