{"product_id":"dometic-duo-therm-non-ducted-heat-strip-120v-3314998","title":"Dometic Duo-Therm Non-Ducted A\/C Heat Strip Kit, 120V (3314998.000)","description":"\u003cp class=\"nvn-hero\"\u003eThe Dometic Duo-Therm 3314998.000 heat strip adds electric heat to a non-ducted rooftop air conditioner, so you get warm air out of the same ceiling assembly you already cool with. It's a 120-volt element that mounts under the air distribution box and runs off your existing control box and thermostat. Great for taking the morning chill off the cabin.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eIf your non-ducted Dometic rooftop air conditioner keeps the rig cool all summer but leaves you reaching for a space heater in spring and fall, this is the part that fixes it. The Duo-Therm 3314998.000 is an electric heat strip kit. It drops into the air conditioner you already own and gives you warm air out of the same ceiling assembly, controlled by the same thermostat. No second appliance, no extra vents, no ductwork.\u003c\/p\u003e\n\u003cp\u003eNon-ducted rooftop units are the simple, popular setup on a lot of trailers, vans, and smaller motorhomes. Cool air comes straight down out of the ceiling assembly instead of running through ducts in the roof. That layout is efficient and easy to service, but from the factory most non-ducted air conditioners only cool. Adding this strip is the clean way to get heat out of the same unit without cutting into your ceiling or finding room for another box.\u003c\/p\u003e\n\u003cp\u003eHere's how it works. The heat strip is a resistance heating element wired with a limit switch. It mounts on the ceiling template under the air distribution box, or ADB, and plugs straight into the control box. Once it's in, the element is part of the system. Call for heat at the wall control and the blower pushes cabin air across the warm element and back out the ceiling louvers. Because it runs on 120 volts, it works on the same shore power or generator circuit that feeds the air conditioner.\u003c\/p\u003e\n\u003cp\u003eRunning on 120 volts keeps the wiring straightforward too. There's no separate high-voltage line to pull and no propane plumbing to worry about like you'd have with a furnace. It's electric heat, so it's clean and it's instant.\u003c\/p\u003e\n\u003cp\u003eThe limit switch matters. It's a thermal cutoff that opens the circuit if the element ever runs hotter than it should, say from a blocked return or a stalled blower. That's the kind of built-in protection you want in a part that lives in the ceiling and runs unattended while you're asleep or off exploring.\u003c\/p\u003e\n\u003cp\u003eFitment is specific, so check your model before you order. This strip is built for non-ducted setups. It works with Dometic non-ducted air conditioners including part numbers 457915, 459516, 540315, 540316, 640312, 640315, B57915, and B59516, plus the FJX5357MHE, FJX5457M, and FJX5557M. On the control side it pairs with control boxes 3312020.000, 3313189.049, and 3313189.056, and it seats under air distribution boxes 3314850.000 and 3314851.000. One important limit: it's not compatible with heat pump model air conditioners. Those units already make heat a different way, and the strip isn't the right part for them.\u003c\/p\u003e\n\u003cp\u003eSet your expectations the right way and you'll love it. A heat strip is designed to take the edge off, not to be your only heat source in a hard freeze. It's meant to assist a furnace or heater, not replace one. In temperatures below 40 degrees it may not put out all the heat you want on its own, so if you camp or cruise in genuinely cold weather, keep your furnace in the mix. But for chilly mornings, cool desert nights, and shoulder-season trips, an electric strip that's already tied into your air conditioner is hard to beat. It's quiet, it's simple, and it doesn't burn any propane.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Anyone running a non-ducted Dometic rooftop unit who wants heat without adding a separate appliance. The install is a wiring and mounting job at the ceiling assembly, so if you're comfortable pulling the ADB and making the plug connection you can do it yourself in an afternoon. If you're not, any RV service tech will knock it out quickly. Either way, confirm your air conditioner, control box, and ADB part numbers against the list above first. Get the fitment right and this little strip earns its keep every cool morning you don't have to fire up the furnace.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e120-volt electric heat strip runs off the same shore power or generator circuit as your air conditioner, no separate high-voltage line to pull\u003c\/li\u003e\n  \u003cli\u003eResistance heating element with a built-in limit switch that opens the circuit on overheat for unattended safety\u003c\/li\u003e\n  \u003cli\u003eMounts on the ceiling template under the air distribution box (ADB) and plugs into the control box for a clean, integrated install\u003c\/li\u003e\n  \u003cli\u003eControlled by your existing air conditioner thermostat, so heat and cool share one wall control\u003c\/li\u003e\n  \u003cli\u003eBuilt for non-ducted Dometic rooftop units including 457915, 459516, 540315, 540316, 640312, 640315, B57915, and B59516\u003c\/li\u003e\n  \u003cli\u003eAlso fits the FJX5357MHE, FJX5457M, and FJX5557M non-ducted air conditioners\u003c\/li\u003e\n  \u003cli\u003ePairs with control boxes 3312020.000, 3313189.049, and 3313189.056 and air distribution boxes 3314850.000 and 3314851.000\u003c\/li\u003e\n  \u003cli\u003eElectric heat means no propane use, quiet operation, and instant warmth for chilly mornings and shoulder-season trips\u003c\/li\u003e\n  \u003cli\u003eNot compatible with heat pump model air conditioners, so check your model before ordering\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\u003eWhat does the Dometic 3314998.000 heat strip do?\u003c\/summary\u003e\n    \u003cp\u003eIt adds electric heat to a non-ducted Dometic rooftop air conditioner. The strip is a heating element that mounts in the ceiling assembly and runs off your existing control box and thermostat, so the same unit that cools in summer can warm the cabin in spring and fall.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it heat my rig in freezing weather?\u003c\/summary\u003e\n    \u003cp\u003eA heat strip is meant to assist a furnace or heater, not replace one. In temperatures below 40 degrees it may not produce all the heat you want on its own, so keep your furnace in the mix for genuinely cold conditions. For chilly mornings and cool nights it works great.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat air conditioners is it compatible with?\u003c\/summary\u003e\n    \u003cp\u003eNon-ducted Dometic units including 457915, 459516, 540315, 540316, 640312, 640315, B57915, B59516, FJX5357MHE, FJX5457M, and FJX5557M. It also pairs with control boxes 3312020.000, 3313189.049, and 3313189.056 and air distribution boxes 3314850.000 and 3314851.000.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it work with heat pump air conditioners?\u003c\/summary\u003e\n    \u003cp\u003eNo. This strip is not compatible with heat pump model air conditioners. Those units already produce heat a different way and need a different part.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat voltage does it run on?\u003c\/summary\u003e\n    \u003cp\u003e120 volts. It runs on the same standard circuit that feeds your air conditioner, whether that's shore power or a generator, so there's no separate high-voltage wiring to add.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow is it controlled?\u003c\/summary\u003e\n    \u003cp\u003eThrough your existing air conditioner thermostat. The strip plugs into the control box and becomes part of the system, so you call for heat at the same wall control you use to cool.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it safe to run unattended?\u003c\/summary\u003e\n    \u003cp\u003eThe kit includes a limit switch, a thermal cutoff that opens the circuit if the element gets too hot, for example from a blocked return or a stalled blower. That built-in protection is there for the times the unit runs while you're asleep or away.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhere does the heat strip install?\u003c\/summary\u003e\n    \u003cp\u003eIt mounts on the ceiling template under the air distribution box, or ADB, and plugs into the control box. If you're comfortable pulling the ADB and making the connection it's an afternoon job, otherwise any RV service tech can install it quickly.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is a non-ducted air conditioner?\u003c\/summary\u003e\n    \u003cp\u003eIt's a rooftop unit that delivers air straight down through the ceiling assembly instead of routing it through ducts in the roof. It's a common, easy-to-service setup on trailers, vans, and smaller motorhomes, and this heat strip is designed specifically for that layout.\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 Duo-Therm Non-Ducted Air Conditioner Heat Strip Kit, 120V\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\u003e3314998.000\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e713814206345\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e120V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFrequency\u003c\/th\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003ctd\u003eNon-Ducted\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eAuxiliary electric heat strip kit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIncludes\u003c\/th\u003e\n\u003ctd\u003eHeating element and limit switch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOverheat Protection\u003c\/th\u003e\n\u003ctd\u003eLimit switch opens circuit on overheat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eCeiling template under the air distribution box (ADB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eControl\u003c\/th\u003e\n\u003ctd\u003ePlugs into control box, operated by the air conditioner thermostat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompatible Air Conditioners\u003c\/th\u003e\n\u003ctd\u003e457915, 459516, 540315, 540316, 640312, 640315, B57915, B59516, FJX5357MHE, FJX5457M, FJX5557M\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompatible Control Boxes\u003c\/th\u003e\n\u003ctd\u003e3312020.000, 3313189.049, 3313189.056\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompatible Air Distribution Boxes\u003c\/th\u003e\n\u003ctd\u003e3314850.000, 3314851.000\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHeat Pump Compatibility\u003c\/th\u003e\n\u003ctd\u003eNot compatible with heat pump model air conditioners\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\": \"What does the Dometic 3314998.000 heat strip do?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It adds electric heat to a non-ducted Dometic rooftop air conditioner. The strip is a heating element that mounts in the ceiling assembly and runs off your existing control box and thermostat, so the same unit that cools in summer can warm the cabin in spring and fall.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it heat my rig in freezing weather?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"A heat strip is meant to assist a furnace or heater, not replace one. In temperatures below 40 degrees it may not produce all the heat you want on its own, so keep your furnace in the mix for genuinely cold conditions. For chilly mornings and cool nights it works great.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What air conditioners is it compatible with?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Non-ducted Dometic units including 457915, 459516, 540315, 540316, 640312, 640315, B57915, B59516, FJX5357MHE, FJX5457M, and FJX5557M. It also pairs with control boxes 3312020.000, 3313189.049, and 3313189.056 and air distribution boxes 3314850.000 and 3314851.000.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it work with heat pump air conditioners?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. This strip is not compatible with heat pump model air conditioners. Those units already produce heat a different way and need a different part.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What voltage does it run on?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"120 volts. It runs on the same standard circuit that feeds your air conditioner, whether that's shore power or a generator, so there's no separate high-voltage wiring to add.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How is it controlled?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Through your existing air conditioner thermostat. The strip plugs into the control box and becomes part of the system, so you call for heat at the same wall control you use to cool.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it safe to run unattended?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The kit includes a limit switch, a thermal cutoff that opens the circuit if the element gets too hot, for example from a blocked return or a stalled blower. That built-in protection is there for the times the unit runs while you're asleep or away.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Where does the heat strip install?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It mounts on the ceiling template under the air distribution box, or ADB, and plugs into the control box. If you're comfortable pulling the ADB and making the connection it's an afternoon job, otherwise any RV service tech can install it quickly.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is a non-ducted air conditioner?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a rooftop unit that delivers air straight down through the ceiling assembly instead of routing it through ducts in the roof. It's a common, easy-to-service setup on trailers, vans, and smaller motorhomes, and this heat strip is designed specifically for that layout.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Dometic","offers":[{"title":"Default Title","offer_id":45052082782301,"sku":"2008175","price":152.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_676696bd-fc75-4402-a8fe-188c48b92467.png?v=1789411356","url":"https:\/\/nvnmarine.com\/products\/dometic-duo-therm-non-ducted-heat-strip-120v-3314998","provider":"NVN Marine","version":"1.0","type":"link"}