This 35,000 Btu furnace delivers steady ducted heat for larger RVs, while Soft Start technology helps reduce startup strain on your electrical system. The airflow design helps warm your rig faster on cold mornings. Access door included.
When temperatures drop, a small furnace can leave parts of your RV feeling like a different climate zone. This 35,000 Btu unit is sized for larger rigs that need steady, consistent heat across the whole space. A common guideline is about 1,000 Btu per foot of RV length, making this a solid match for RVs up to about 35' long.
Bigger is not always better when it comes to RV furnaces. An oversized furnace can cycle more often than necessary, use more propane, and create uneven temperatures throughout your RV. Matching furnace output to the size of your rig helps maintain more consistent comfort without overworking the system.
Standard ducted RV heating systems make this a practical replacement for many factory-installed furnaces. It supports horizontal or vertical installation, but alignment still matters. Checking dimensions, duct connections, and vent orientation before ordering helps avoid fit issues during installation.
Most furnace returns come down to fit, not performance. Before ordering, compare the dimensions, duct locations, vent orientation, and door setup with your existing unit. Taking a few measurements upfront helps avoid getting halfway through installation and realizing something is just off enough to stop progress.
Starting a furnace pulls a quick surge of power, which can stress older electrical systems or drain batteries faster when you are off-grid. This can cause voltage drops, dim lights, or even trip fuses. Built-in Soft Start reduces in-rush current by up to 80%, helping startup stay more controlled and reducing strain on your battery and wiring.
This furnace delivers 18% to 22% more airflow than a leading competitor in ducted applications. The one-piece tubular heat exchanger and internal baffle system help push warm air more evenly through your RV so you are not dealing with one warm corner and another that never quite catches up.
A patent-pending Hall Effect Sensor removes moving parts from the ignition system, reducing common wear points and helping support more reliable operation over time. That means fewer components to fail when temperatures drop and you need heat to work the first time without troubleshooting.
This kit includes the compatible white exterior access door along with the furnace, making it a good fit for installations that require exterior access. If you prefer the same furnace with a black access door, check out DMC67SR. Having exterior access makes future maintenance and service easier because the furnace can be reached from outside the RV instead of removing interior panels or cabinetry. This type of setup is often the better fit when the furnace is installed in a harder-to-reach location inside the RV. The removable exterior access panel also simplifies inspections, troubleshooting, and repairs down the road.
Doorless setups create a cleaner exterior appearance because there is no access panel on the outside of your RV, and they eliminate another exterior seal that could eventually require maintenance or resealing. If your setup provides easy access on the interior of your RV, and you'd rather have a cleaner exterior appearance without an exterior access panel, check out the true doorless version, DMC74MR.
A compatible thermostat is required to control the system and is sold separately.
Warm air moves through your RV's duct system for full interior coverage, helping maintain more consistent temperatures across multiple areas of your rig. Ductless heaters are often used for smaller spaces or targeted warmth, but a ducted furnace like this is better suited for maintaining consistent heat across multiple areas of your RV.
Confirm furnace dimensions, duct layout, vent orientation, access door requirements, and thermostat compatibility before ordering.
Alternate Instructions
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everyone. Steve here with etrailer.com. Let's take a look at our Dometic RV LP gas furnace. It has 35,000 BTUs of power, runs on 12 volts, and it comes with a nice white door. So, folks, I wanna start off, again, this is the one with the white door. We do carry this with a black door option sold separately.
And that item number is DMC67SR. So again, DMC67SR, if you're looking for the black door. Now folks, this is a great furnace, whether you're replacing an old unit or just starting from scratch. There's no shore power needed. It runs on LP gas.
The hookup for that gas is right up here on top. You remove the rubber plug, and then you have another safety plug just protecting the threads here. And then you thread in your LP gas. And then, of course, you wire up your 12 volt wires here to your battery set or your power grid system in the RV or camper, and you're ready to go. It does use quiet SoftStart system that's built in, that's gonna kick in without any loud jolt or power spikes.
And that's a great thing because no one likes to hear a lot of noise and those kind of things, or lose power or trip breakers. So an image here on the screen of the inside of this, you can see the tubular one piece heat exchanger in the back there with all the curved tubes, and there's integrated baffles and everything inside of there that's going to provide more airflow, giving you faster, even heat distribution. And it has what's called a Hall Effect Sensor. And that just eliminates moving parts, giving you greater durability over the life of the furnace. So again, folks, a nice white door.
I have everything just kind of loosely put on here. It does come with the screws and everything to screw it in. And you have the heat exchange exit here. And then, of course, the door can come off if you take the screws off, which again, I never put the screws in. And then you have your on/off/reset button right here. And then as you can see, you can see a little bit more of the inside here and everything. You can mount this the way I have it now, or you can change it so it can go both vertical or horizontal. It's totally up to you. As you can see, you got two vent pop outs here on the side. It does come with four of these adapters included. You have two on the top you could pop out. Three on the back, and then two on the other side. So no matter your setup, you should be covered as far as how you need to hook it up for your specific setup. And, again, that will go back on there. I'm gonna go ahead and leave that off for now. But, again, folks, a great option for you. Again, whether you're starting new or replacing yours, it is 20 inches deep from front to back, seven inches tall whenever it's laid down the way it is now, and 17 inches wide, again, the way I have it laid down right now. So, again, folks, 12 volts, runs on LP gas, a great option for you. This is the Dometic RV LP gas furnace, 35,000 BTU. I'm Steven. Thanks for watching.
Ratings & Reviews
Just installed it and its making grinding and clicking noise, something is wrong with fan motor. Sad about workmanship these days.
Installed and working hours after delivery! Worked great in 1999 Dutchman .
It was easy to get all the info I needed to select the correct heater for my 5th wheel.
Easy installation
etrailer was extremely helpful in navigating the myriad of choices available and determining the correct unit to purchase. We provided the BTU output and dimensions with the ductwork configuration that allowed the salesman to accurately sell the unit that (1) fit in the space provided without modifications (2) matched the BTU output (3) provided auto ignition and worked from the existing thermostat and (4) required minimum modifications for the ductwork.
The old furnace suffered from a cracked heat exchanger which set off the carbon monoxide alarm inside the camper. Carbon monoxide is deadly and could cause a fatality. We took the furnace apart and sent the heat exchanger to a welding shop for repair. The crack was repaired, but other holes were found during pressure testing. The heat exchanger was a
discontinued item for manufacturing and therefore lead to the decision to replace.
The unit cabinet required modification to accommodate a horizontal installation with a floor duct inlet that was different than the configuration provided by the factory. A new duct outlet was cut using a template from the old furnace and using sheet metal shears. The gas line required a slight modification to reroute from a side entrance to the top. The plastic connector and wiring harness were removed from the old furnace and installed on the new furnace with heat shrink connectors. The modifications took a couple of hours to complete, however the unit is installed and working as expected.
The furnace after installation is performing very well. The unit operates from the original thermostat. We have stayed in the camper for a week with temperatures dipping down to 25 degrees Fahrenheit with extremely good comfort. etrailer is highly recommended for anyone shopping for a new RV furnace.
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