{"product_id":"dometic-dfmdh35111-35-000-btu-lp-gas-rv-furnace","title":"Dometic DFMDH35111 35,000 BTU LP Gas RV Furnace","description":"\u003cp class=\"nvn-hero\"\u003eThe Dometic DFMDH35111 is a 35,000 BTU single-stage LP gas RV furnace with 12-volt forced-air heating and a bottom-discharge layout. An improved air baffle moves more warm air than earlier designs, and automotive-grade ignition with soft start gives you dependable, quiet startups.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Dometic DFMDH35111 is a 35,000 BTU LP gas furnace designed to keep an RV warm through cold nights and shoulder-season trips. It's a single-stage forced-air unit, which means it fires at full output when the thermostat calls for heat and shuts off when the space is warm. That straightforward operation is exactly what you want in a furnace that has to run reliably far from a service center. With 35,000 BTU of input and roughly 25,840 BTU of usable output, it's sized for mid-size coaches and trailers where you need real heat, not just a takeoff of the chill.\u003c\/p\u003e\n\u003cp\u003eThis is a bottom-discharge model, so the warm air leaves the furnace downward into the floor ducting common in many RV layouts. Inside, Dometic redesigned the air baffle to move noticeably more air than earlier furnaces, with the company citing an 18 to 22 percent airflow improvement. In practice that means the cabin comes up to temperature faster and the warmth spreads more evenly through the duct runs, so you're not left with a hot spot near the furnace and cold air at the far end of the coach.\u003c\/p\u003e\n\u003cp\u003eStartups are handled by an automotive-grade Hall Effect sensor ignition with a built-in soft start. If you've lived with an older furnace that bangs to life and jolts the whole rig, you'll appreciate the difference. The soft start eases the blower up to speed rather than slamming it on, which cuts the noise and the vibration every time the furnace cycles. That matters most at night, when a quieter, smoother startup is the difference between sleeping through a cold snap and being woken every time the heat kicks in.\u003c\/p\u003e\n\u003cp\u003ePower comes from your RV's 12-volt DC system. The blower draws about 11.1 amps, so it's important to have healthy batteries or shore power backing the furnace on a long, cold night, since the fan runs whenever the burner is heating. The furnace burns LP gas, tying into your rig's existing propane supply, and it's engineered to deliver steady, even heat rather than short, hard bursts. The combination of forced-air delivery and improved baffling is what makes a modern furnace feel more comfortable than an older one of the same rating.\u003c\/p\u003e\n\u003cp\u003eThe DFMDH35111 measures roughly 16-1\/2 inches wide, 7 inches high, and 20 inches deep, and it weighs about 26 pounds, so it fits the furnace bays used in many recreational vehicles. It's a doored-style unit, and the access door and the wall thermostat are ordered separately so you can match them to your rig and your preferred control. If you're replacing a furnace that's grown loud, weak, or unreliable, stepping up to this model brings better airflow and a smoother, quieter cycle without reinventing your ductwork.\u003c\/p\u003e\n\u003cp\u003eA furnace is one of those components you don't think about until it fails on the coldest night of the trip, which is why it's worth installing a dependable one from a company that has built RV and marine climate equipment for decades. Plan the install so the 12-volt feed is properly sized for the blower's draw, confirm the LP connection and venting meet the furnace's requirements, and pair it with a compatible thermostat. Set up correctly, the DFMDH35111 delivers strong, even heat, starts quietly, and keeps the whole rig comfortable whether you're boondocking in the mountains or riding out a cold front at the marina. It's a practical, well-engineered upgrade for anyone who camps or cruises when the temperature drops.\u003c\/p\u003e\n\u003cp\u003eIt's also worth thinking about how you'll use the rig over its lifetime. If you extend your season into late fall or head somewhere cold, a furnace that heats quickly and evenly earns its keep every single night. The improved airflow means shorter run times to reach temperature, which is easier on your batteries and your propane, and the quieter cycle keeps the cabin restful. Match it with a good thermostat and clean ducting and you've got a heating system you can trust for years of trips.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e35,000 BTU input single-stage LP gas RV furnace with about 25,840 BTU output\u003c\/li\u003e\n  \u003cli\u003eBottom-discharge forced-air layout suits common RV floor ducting\u003c\/li\u003e\n  \u003cli\u003eRedesigned air baffle moves 18 to 22 percent more air than earlier designs\u003c\/li\u003e\n  \u003cli\u003eAutomotive-grade Hall Effect sensor ignition with built-in soft start\u003c\/li\u003e\n  \u003cli\u003eSoft start eases the blower up to speed for quieter, smoother cycles\u003c\/li\u003e\n  \u003cli\u003eRuns on 12-volt DC power with an 11.1 amp blower draw\u003c\/li\u003e\n  \u003cli\u003eBurns LP gas from your RV's existing propane supply\u003c\/li\u003e\n  \u003cli\u003eCompact bay-friendly size at roughly 16.5 by 7 by 20 inches and about 26 pounds\u003c\/li\u003e\n  \u003cli\u003eAccess door and wall thermostat available separately to match your rig\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Dometic reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow much heat does the DFMDH35111 produce?\u003c\/summary\u003e\n    \u003cp\u003eIt's rated at 35,000 BTU of input with roughly 25,840 BTU of usable output. That's enough to heat mid-size coaches and trailers on cold nights and during shoulder-season trips.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a single-stage or two-stage furnace?\u003c\/summary\u003e\n    \u003cp\u003eIt's a single-stage furnace. It fires at full output when the thermostat calls for heat and shuts off once the space is warm, which keeps operation simple and dependable.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhich direction does the warm air discharge?\u003c\/summary\u003e\n    \u003cp\u003eIt's a bottom-discharge model, so warm air leaves the furnace downward into floor ducting. That layout matches the ductwork used in many RV floor plans.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat ignition system does it use?\u003c\/summary\u003e\n    \u003cp\u003eIt uses an automotive-grade Hall Effect sensor ignition with a built-in soft start. The soft start eases the blower up to speed rather than slamming it on, so cycles are quieter and smoother.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat power does the furnace need?\u003c\/summary\u003e\n    \u003cp\u003eIt runs on your RV's 12-volt DC system, and the blower draws about 11.1 amps. Keep your batteries healthy or stay on shore power on long cold nights, since the fan runs whenever the burner is heating.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat fuel does it burn?\u003c\/summary\u003e\n    \u003cp\u003eIt burns LP gas and ties into your RV's existing propane supply. Confirm the gas connection and venting meet the furnace's requirements during installation.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it come with a thermostat and access door?\u003c\/summary\u003e\n    \u003cp\u003eNo. The wall thermostat and the access door are ordered separately so you can match them to your rig and your preferred control. Plan for those items when you order.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it fit my furnace bay?\u003c\/summary\u003e\n    \u003cp\u003eIt measures roughly 16-1\/2 inches wide, 7 inches high, and 20 inches deep and weighs about 26 pounds, which fits many RV furnace bays. Always confirm your bay dimensions and ducting before installing.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eDometic DFMDH35111 35,000 BTU LP Gas RV Furnace\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eDometic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eDFMDH35111\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e7315091545105\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eRV Furnace\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHeat Input\u003c\/th\u003e\n\u003ctd\u003e35,000 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHeat Output\u003c\/th\u003e\n\u003ctd\u003eApproximately 25,840 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFuel\u003c\/th\u003e\n\u003ctd\u003eLP gas\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eStage\u003c\/th\u003e\n\u003ctd\u003eSingle stage\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDischarge\u003c\/th\u003e\n\u003ctd\u003eBottom discharge\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAir Delivery\u003c\/th\u003e\n\u003ctd\u003eForced air, redesigned baffle for 18 to 22 percent more airflow\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIgnition\u003c\/th\u003e\n\u003ctd\u003eAutomotive-grade Hall Effect sensor with soft start\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBlower Draw\u003c\/th\u003e\n\u003ctd\u003e11.1 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Voltage\u003c\/th\u003e\n\u003ctd\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eThermostat\u003c\/th\u003e\n\u003ctd\u003eExternal, sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDimensions (W x H x D)\u003c\/th\u003e\n\u003ctd\u003e16.5 in x 7 in x 20 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eApproximately 26 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How much heat does the DFMDH35111 produce?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's rated at 35,000 BTU of input with roughly 25,840 BTU of usable output. That's enough to heat mid-size coaches and trailers on cold nights and during shoulder-season trips.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a single-stage or two-stage furnace?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a single-stage furnace. It fires at full output when the thermostat calls for heat and shuts off once the space is warm, which keeps operation simple and dependable.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Which direction does the warm air discharge?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a bottom-discharge model, so warm air leaves the furnace downward into floor ducting. That layout matches the ductwork used in many RV floor plans.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What ignition system does it use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It uses an automotive-grade Hall Effect sensor ignition with a built-in soft start. The soft start eases the blower up to speed rather than slamming it on, so cycles are quieter and smoother.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What power does the furnace need?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It runs on your RV's 12-volt DC system, and the blower draws about 11.1 amps. Keep your batteries healthy or stay on shore power on long cold nights, since the fan runs whenever the burner is heating.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What fuel does it burn?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It burns LP gas and ties into your RV's existing propane supply. Confirm the gas connection and venting meet the furnace's requirements during installation.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it come with a thermostat and access door?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. The wall thermostat and the access door are ordered separately so you can match them to your rig and your preferred control. Plan for those items when you order.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it fit my furnace bay?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It measures roughly 16-1\/2 inches wide, 7 inches high, and 20 inches deep and weighs about 26 pounds, which fits many RV furnace bays. Always confirm your bay dimensions and ducting before installing.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Dometic","offers":[{"title":"Default Title","offer_id":44784511516765,"sku":"2006804","price":1404.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_1d8e844b-1944-422f-a88d-cc725c3ddec4.png?v=1784897263","url":"https:\/\/nvnmarine.com\/products\/dometic-dfmdh35111-35-000-btu-lp-gas-rv-furnace","provider":"NVN Marine","version":"1.0","type":"link"}