This 35,000 Btu furnace delivers steady ducted heat for larger RVs, while Soft Start technology reduces startup strain. This doorless configuration is intended for installations without exterior access doors.
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.
This unit is designed to work within standard ducted RV heating systems, making it 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 installation 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 is the true doorless version of the furnace, which means it does not include an exterior access door and is not compatible with adding one later. Doorless setups create a cleaner exterior appearance because there is no large access panel on the outside of the RV, and they eliminate another exterior seal that could eventually require maintenance or resealing.
The tradeoff is service access. Maintenance and repairs must be performed from inside the RV, so this configuration works best when the furnace is installed in a location that remains reasonably accessible from the interior.
If having an exterior access door sounds like the better fit for your setup, you can get this same furnace with a black access door, DMC67SR. For a white access door, check out DMC47SR.
A compatible thermostat is required to control the system.
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, and thermostat compatibility before ordering. This model does not support exterior access door installation.
Customer Satisfaction Score:
91% were satisfied with this product
9% of customers were not satisfied
Ratings & Reviews
Great product
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.
Fast shipping.
Great product description and fast ship ping.
Unit very good. Shipping sooner than expected. Price very good. Etrailer a very good company to deal with and go beyond expectations! Thank you
It works as well as the original but was way overpriced. etrailer service was excellent.
The flimsy sheet metal on one end was slightly bent when I received it, but that was no issue. The unit installed quickly it was the correct item and is performing fine.
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