{"product_id":"dometic-dfld40111-40-000-btu-rv-furnace","title":"Dometic DFLD40111 40,000 BTU LP Gas RV Furnace","description":"\u003cp class=\"nvn-hero\"\u003eThe Dometic DFLD40111 is a 40,000 BTU LP gas RV furnace that delivers strong, ducted forced-air heat throughout large coaches. Its 12-volt DC blower distributes warmth through multiple duct outlets, keeping fifth wheels and big motorhomes comfortable in cold-weather camping.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Dometic DFLD40111 is a high-output ducted furnace built to keep large RVs warm when the temperature drops. Rated at 40,000 BTU per hour, it's one of the bigger units in Dometic's furnace lineup, which makes it the right choice for spacious fifth wheels, big travel trailers, and Class A motorhomes that a smaller furnace simply can't keep up with. If you camp into the cold shoulder seasons or chase the snow, having enough heating capacity is what stands between a cozy cabin and a long, chilly night.\u003c\/p\u003e\n\u003cp\u003eThis furnace burns LP gas, the propane you already carry for cooking and refrigeration, and turns it into clean, even forced-air heat. A 12-volt DC blower pulls its power from your house batteries and pushes warm air through the coach, so the furnace works whether you're plugged into shore power or dry camping off-grid. That's the beauty of a propane furnace. As long as you've got gas in the tank and charge in the batteries, you've got heat, no hookup required. For boondockers and remote campers, that self-sufficiency is essential, and it's exactly why forced-air LP furnaces remain the backbone of RV heating.\u003c\/p\u003e\n\u003cp\u003eBecause the DFLD40111 is a ducted furnace, it's designed to distribute heat evenly through your coach's duct system rather than dumping it all in one spot. Dometic built it to support multiple duct outlets, so warm air reaches the bedroom, the living area, and the far corners of a big rig instead of leaving cold zones. The forced-air design also helps keep your plumbing bays and holding tanks above freezing when routed properly, which is a real advantage for anyone who wants to stretch the season without worrying about frozen lines. Even heat distribution is what makes a large coach genuinely livable in the cold.\u003c\/p\u003e\n\u003cp\u003eInstallation is meant to be clean and integrated. The furnace mounts inside the coach with the burner exhausting through an exterior sidewall vent, and you'll pair it with a wall thermostat to control it. Keep in mind that the furnace is the core unit. Depending on your setup, the outside access door and the thermostat may be sold separately, so it's worth confirming exactly what your install needs before you order. The unit itself is relatively compact for its output, measuring roughly 16 inches wide by 9 inches tall by 20 inches deep, and it weighs in the mid-30-pound range, which keeps it manageable to handle and mount.\u003c\/p\u003e\n\u003cp\u003eWho's this furnace for? Owners of larger RVs who need serious heating muscle, anyone replacing a worn-out or undersized furnace, and cold-weather campers who refuse to let a little frost cut a trip short. If your current heater runs constantly and still leaves the far end of the coach cold, stepping up to 40,000 BTU makes a night-and-day difference. You'll cycle less, recover temperature faster after opening the door, and sleep warmer.\u003c\/p\u003e\n\u003cp\u003eA few practical notes. Furnace airflow and venting matter, so follow Dometic's clearance and duct guidance closely for safe, efficient operation, and have the LP connections handled by someone who knows gas systems if you're not comfortable with them yourself. Done right, a properly sized forced-air furnace is one of the most reliable comfort systems in an RV. There's a lot to be said for the peace of mind that comes from knowing your furnace can handle whatever the forecast throws at you, especially when you're parked somewhere beautiful and remote with the wind picking up outside. A furnace that's sized to the coach doesn't strain, and it keeps the whole space evenly comfortable from the moment you turn in until morning. At NVN Marine we're glad to help you confirm the model fit, the duct requirements, and which accessories you'll need so your heat is ready before the cold arrives, not after you've already felt it.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eHigh-output 40,000 BTU per hour heating for large RVs\u003c\/li\u003e\n  \u003cli\u003eBurns LP gas you already carry for cooking and refrigeration\u003c\/li\u003e\n  \u003cli\u003e12-volt DC blower runs on house batteries for off-grid heat\u003c\/li\u003e\n  \u003cli\u003eDucted design distributes even warmth through multiple outlets\u003c\/li\u003e\n  \u003cli\u003eHelps keep plumbing bays and tanks above freezing when routed properly\u003c\/li\u003e\n  \u003cli\u003eCompact unit relative to its heating output\u003c\/li\u003e\n  \u003cli\u003eSidewall-vented forced-air design for clean, integrated installation\u003c\/li\u003e\n  \u003cli\u003eIdeal for large fifth wheels, big trailers, and Class A motorhomes\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 DFLD40111 produce?\u003c\/summary\u003e\n    \u003cp\u003eIt's rated at 40,000 BTU per hour, making it one of the higher-output furnaces in Dometic's lineup. That capacity is built for large fifth wheels, big travel trailers, and Class A motorhomes.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat fuel does it use?\u003c\/summary\u003e\n    \u003cp\u003eIt burns LP gas, the same propane you carry for cooking and refrigeration. It turns that fuel into clean, even forced-air heat throughout your coach.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I run it off-grid?\u003c\/summary\u003e\n    \u003cp\u003eYes. The 12-volt DC blower draws from your house batteries, so as long as you have propane in the tank and charge in the batteries, you have heat without needing a shore power hookup.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a ducted furnace?\u003c\/summary\u003e\n    \u003cp\u003eYes. It's designed to distribute heat through your coach's duct system and supports multiple duct outlets, so warm air reaches the far corners of a large rig instead of leaving cold zones.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it help protect my plumbing from freezing?\u003c\/summary\u003e\n    \u003cp\u003eWhen the ducting is routed properly, the forced-air design can help keep plumbing bays and holding tanks above freezing. That's a real advantage for stretching your camping season into colder weather.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the dimensions and weight?\u003c\/summary\u003e\n    \u003cp\u003eThe furnace measures roughly 16 inches wide by 9 inches tall by 20 inches deep and weighs in the mid-30-pound range, which is compact for its output and manageable to handle 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\u003eThe furnace is the core unit. Depending on your setup, the exterior access door and the wall thermostat may be sold separately, so it's worth confirming exactly what your installation needs before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWho should choose this furnace?\u003c\/summary\u003e\n    \u003cp\u003eIt's ideal for owners of larger RVs who need strong heating, anyone replacing an undersized or worn-out furnace, and cold-weather campers. If your current heater can't keep the whole coach warm, 40,000 BTU makes a big difference.\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 DFLD40111 40,000 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\u003e38359\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e0713814220938\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eDFLD40111\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eDucted RV Furnace\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHeating Output\u003c\/th\u003e\n\u003ctd\u003e40,000 BTU per hour\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFuel Type\u003c\/th\u003e\n\u003ctd\u003eLP gas (propane)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAir Distribution\u003c\/th\u003e\n\u003ctd\u003eDucted, supports multiple duct outlets\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBlower Voltage\u003c\/th\u003e\n\u003ctd\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCurrent Draw\u003c\/th\u003e\n\u003ctd\u003eApproximately 11 to 12.5 amps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003eApproximately 16.5 in W x 9 in H x 20 in D\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eApproximately 35 to 39 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIncluded\u003c\/th\u003e\n\u003ctd\u003eFurnace unit, access door and thermostat sold separately\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 DFLD40111 produce?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's rated at 40,000 BTU per hour, making it one of the higher-output furnaces in Dometic's lineup. That capacity is built for large fifth wheels, big travel trailers, and Class A motorhomes.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What fuel does it use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It burns LP gas, the same propane you carry for cooking and refrigeration. It turns that fuel into clean, even forced-air heat throughout your coach.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I run it off-grid?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. 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