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  1. RV Furnace
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  5. 16-1/2W x 7T x 20D Inch
  6. 5th Wheel
  7. Motorhome
  8. Travel Trailer
Dometic RV LP Gas Furnace - 35,000 Btu - 12V - Doorless
Dometic

Dometic RV LP Gas Furnace - 35,000 Btu - 12V - Doorless

Part Number: DMC74MR
In Stock
$1,901.53
RV Furnace
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Made for full-season use, this RV furnace runs without shore power and delivers quiet, efficient heat wherever you travel. Soft Start tech eases power draw, and the airflow design helps warm your rig fast, taking the edge off those cold mornings. Great Prices for the best rv furnace from Dometic. Dometic RV LP Gas Furnace - 35,000 Btu - 12V - Doorless part number DMC74MR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Dometic RV Furnace - DMC74MR

  • 35000 Btu
  • Dometic
  • Doorless
  • 16-1/2W x 7T x 20D Inch
  • 5th Wheel
  • Motorhome
  • Travel Trailer

Made for full-season use, this RV furnace runs without shore power and delivers quiet, efficient heat wherever you travel. Soft Start tech eases power draw, and the airflow design helps warm your rig fast, taking the edge off those cold mornings.


Highlights

  • Sized for RVs Up to 35 Feet: 35,000 Btu furnace is perfect for replacing, upgrading, or adding heat in your RV for full-season comfort.
  • No Shore Power Needed: Boondock-ready design heats with LP gas and 12V power.
  • Quiet, Reliable Starts: Built-in Soft Start limits in-rush current, so your compressor starts smoothly without the usual jolt.
  • Quick, Even Heat Distribution: Heats quickly and evenly with a tubular exchanger and baffle system that optimize airflow and heat transfer.
  • Hall Effect Sensor Improves Reliability: No moving parts mean fewer failures and longer furnace life.

Features to know about

Built for Efficiency, Not Just Output

Dometic tubular heat exchanger

If you've ever wondered what makes a furnace more efficient, or why some heaters just sound like they're working harder than others, the difference is usually inside the heat exchanger. Many RV furnaces use a basic box-style design that creates uneven heat and noisy air movement. This model upgrades to a tubular heat exchanger with an internal baffle system that improves airflow, boosts efficiency, and helps your rig heat faster without the racket. It's sized for RVs up to 35 feet, and the system is engineered to reduce turbulence for more even, comfortable heating throughout your space.


Bigger isn't always better. Getting a furnace that's larger than you need can actually burn more propane than necessary and cause inefficient cycling. A good rule of thumb is about 1,000 Btus per foot of RV length. That means a 20,000 Btu furnace is right for a 20' trailer, and a 35,000 Btu furnace like this one is a smart fit for mid- to large-sized RVs that need consistent, full-season heating.

Off-Grid Comfort You Can Count On

When you're camping without hookups, every amp counts. This propane-powered furnace runs on 12V DC and includes built-in Soft Start technology that reduces in-rush current by up to 80%. That means quieter startups, less strain on your batteries, and a more stable ignition, even in cold or remote conditions. A patent-pending Hall Effect sensor replaces traditional moving parts for more reliable operation and fewer failures when temperatures drop. From replacing an aging system to uprading for full-season travel, this furnace is built to keep you comfortable wherever you go.

Specs

Heating Specifications

  • Heating capacity: 35,000 Btu
  • Fuel type: Propane (LP gas)
  • Power supply: 12V DC
  • Amperage: 11.1 amps
  • Wattage: 132 watts

Dimensions

  • Furnace dimensions: 20" deep x 7" tall x 16-1/2" wide
  • Weight: 33.5 lbs
  • Material: Stamped powder-coated steel
  • Color: Black

General

  • Installation: Horizontal or vertical configuration
  • Certification: CSA certified
  • Warranty: 2-year limited


9610007794 - Dometic RV Furnace - 35,000 Btu - Doorless

Installation Details DMC74MR Installation instructions


California residents: click here


Ratings & Reviews

5.0

11 reviews
Made for full-season use, this RV furnace runs without shore power and delivers quiet, efficient heat wherever you travel. Soft Start tech eases power draw, and the airflow design helps warm your rig fast, taking the edge off those cold mornings.

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Great product



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Was extremely impressed with your attention to detail with the photos of your employees who help with the process and the truck icon and path of the item in transit. Extremely satisfied with the service.



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Fast shipping.



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Great product description and fast ship ping.



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Unit very good. Shipping sooner than expected. Price very good. Etrailer a very good company to deal with and go beyond expectations! Thank you



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11
11

See what our Experts say about this Dometic RV Furnace

  • Solution for Broken Thermostat of Atwood RV Furnace 2334DCLP
    Hey Gary, if I were I would want to keep the furnace you have now and try and find a thermostat replacement for it. I don't have any resources on what you have and what it would take to convert to a single stage furnace or if that is even possible so what I would recommend is find an HVAC guy in your area and see if they can either come up with a thermostat solution for it so that you can use it to it's full functionality or find a way to to convert it to a single stage. We do have a...
    view full answer...
  • Replacing Old Atwood AFMD35121 Furnace With Dometic Furnace In 2019 Keystone Cougar 5th Wheel RV
    Harvey, you’re right on target asking about sizing. The AFMD35121 was a 35k BTU unit that’s been discontinued. You can step into the 35K BTU # DMC74MR furnace by Dometic, but it is 2 inches taller than your current one. Most folks just enlarge the cabinet opening if need be, and you won't have any issue or difference from the outside since it uses the same standard size exhaust outlet. Is this the original furnace that came in your 5th wheel RV?
    view full answer...
  • Does Fogatti RV Furnace FG55FR Have Vent Knockouts On The Bottom To Go Through Floor?
    Michael, the Fogatti # FG55FR is designed with top and side venting, but not a direct floor knockout like your 8535 had. That said, many customers adapt it with duct rerouting, especially since Fogatti offers multiple duct connections. If preserving the floor feed is critical, you may need to either patch and reroute or consider a Dometic model with a bottom knockout like # DMC74MR Are you hoping to keep the exact duct pattern, or is some modification okay? That’ll determine whether the...
    view full answer...
  • Are There Downsides To Using Doorless RV Furnace In 2018 Jayco Eagle?
    Good thinking, Matt. The doorless Dometic RV Furnace # DMC74MR installs flush inside, so you won’t have the external door panel to maintain or seal up against weather. The only real tradeoff is convenience: you’ll have to access it from inside the RV for service, rather than popping a panel outside. Some folks prefer that since it keeps the exterior cleaner. If you’re camping in freezing temps, I’d also suggest double-checking your ducting insulation while you’ve got things apart. If...
    view full answer...
  • Do Dometic RV Furnaces Come With Duct Adapters And Mounting Brackets?
    Alan, all models of the Dometic RV Furnaces ( such as these # DMC64MR, # DMC99MR, # DMC74MR) include the mounting brackets, duct adapters, and the ventilation assembly in the box. You won’t be chasing down extra parts unless you’re re-routing ductwork. Do you already have 4” round ducts, or are you tying into something different? Other shoppers - did your install require extra fittings for any custom work, or did everything line up?
    view full answer...
  • Do Dometic 12V Furnaces Ship Ready For Propane, LP, Or Natural Gas for Permanent Install?
    Bob, the new Dometic RV furnaces such as # DMC64MR, # DMC99MR, and # DMC74MR are propane-only (LP), 12V DC furnaces. Dometic does make some large-frame units that run LP and natural gas, such as DFLA40211 which we don't currently carry. If you’re setting up a permanent rig, you’d need to stay with LP or look at the DFLA40211, or even a residential style. Are you installing this in an RV or more of a cabin setup? Anyone else here running theirs full-time on propane - how’s the consumption...
    view full answer...
  • Replacing Old Atwood Furnace 120V AC Park Model With New Dometic 12V Modern Furnace
    Mark, great catch. These furnaces, such as Doorless # DMC74MR, White Door # DMC99MR, and Black Door # DMC64MR are strictly 12V DC for the electronics and blower, so you’d need to wire in a 12V supply. In a park model, that usually means adding a converter and 12V battery setup. Are you open to wiring in a 12V system, or do you want to stay 120V only? For others here with park models - did you convert to 12V furnaces, or stick with AC units?
    view full answer...
  • Replacement Dometic 942 Furnace For 2020 RV Travel Trailer
    Justin, Dometic sometimes shifts model codes between OEM and aftermarket. Your 942 is essentially the same as the 40k BTU # DMC74MR doorless but the dimensions could be a bit off. The biggest thing is confirming dimensions: 20” deep x 7” tall x 16-1/2” wide. If those match your cutout, it’s a drop-in replacement. It looks like yours may be 9" tall instead; this is normal and not an issue at all. If in a cabinet, you won't have to worry unless you want to fill the gap with something from...
    view full answer...
  • How Loud Are Dometic RV 12V Furnaces Compared To Old Atwood Model?
    Daniel, the Dometic units like # DMC74MR (doorless, no service door for outside the rv) are about on par with late-model Atwoods in terms of fan noise. You’ll definitely hear the blower kick in, but many folks say the tone is smoother, less “rattly” than older furnaces, especially if your old one has a few miles on her. It also has a built-in soft start capacitor so that it pulls less amps at first and has a less noisy startup. So I'd confidently say it will be less noisy than an older...
    view full answer...
  • Recommended RV Furnace Size For 1995 American Star 30 Foot Travel Trailer
    Joe, for a 30-foot trailer you’re right in the sweet spot for a 35- 40k BTU unit like the # DMC64MR. It’ll give you even coverage across your ducts without struggling in cold weather. If your trailer is well-insulated, you could technically get by with a 30k BTU, but I would just stick with 35K. Does your grandmother’s rig still have the original ductwork intact? Also does your 95 travel trailer have a service door for sure? If so, the # DMC64MR will work, but if not, you'll instead...
    view full answer...

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Info for this part was:

Employee Steven C
Installed by:
Steven C
Employee Daron K
Updated by:
Daron K
Employee Michael B
Updated by:
Michael B
Employee Sabrina W
Updated by:
Sabrina W
Employee Kara L
Edited by:
Kara L
Employee Lincoln B
Written by:
Lincoln B

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