Dometic 20000 BTU LP Gas RV Furnace Single Stage

Cold weather doesn't have to cut a trip short. The Dometic 20,000 BTU LP gas furnace brings serious, dependable heat to RVs, travel trailers, and motorhomes, so you stay comfortable whether you're chasing shoulder-season fishing or wintering in the desert. It's a compact, single-stage forced-air furnace with the output to warm a real living space and the flexibility to fit a wide range of floor plans.

The headline is 20,000 BTU of heating input, and that capacity is what lets this furnace keep pace when temperatures really drop. As a single-stage unit, it keeps operation simple and dependable. It fires at full output the moment your thermostat calls for heat, then shuts off cleanly once the cabin is warm, cycling to hold the temperature you set. There's less to go wrong and less to service, which is exactly what you want in a furnace you rely on far from home.

One of this model's standout traits is its flexible discharge. It's designed for side or bottom discharge, so you can configure the warm-air outlet to match how your rig is built and where the furnace has to live. That adaptability makes it a strong candidate for both new installations and replacements, since you're not locked into a single airflow direction. Paired with its ductable design, you can route heat through most common duct configurations to reach every corner of the coach.

Fuel is standard LP gas, so the furnace draws from your rig's propane supply alongside your stove and water heater. The blower and controls run on 12-volt DC power, which keeps the furnace heating even when you're boondocking off your house batteries with no shore power in sight. That pairing of propane heat and 12-volt operation is the proven formula behind RV forced-air furnaces, and it's why they remain the heating heart of so many rigs.

Despite its output, the furnace stays impressively compact. The cabinet measures about 12 inches wide, 7 inches tall, and 20 inches deep, and it weighs only around 21 pounds. That small, light package means it fits into tight mechanical bays and cabinet cutouts where a bulkier furnace simply won't go, which is a real advantage in trailers and motorhomes where storage is precious.

Safety and airflow are built in. A sail switch confirms the blower is actually moving air before the burner will light, so the furnace won't fire without proper airflow through the system. It's a simple, important protection for a gas appliance you sleep near, and it's part of why these Dometic furnaces have earned their reputation for dependable operation night after night.

Installation follows familiar RV furnace practice, with an exterior access panel for combustion air and the burner and a duct connection inside the coach. Because it's a gas appliance, most owners have it fitted or inspected by a qualified RV technician and follow the Dometic installation instructions closely. Set up correctly, it's a reliable, low-fuss source of heat you can count on for years.

Consider the rigs that lean on this kind of capacity. A larger travel trailer that stays out through hunting season. A motorhome that snowbirds through chilly desert nights. A toy hauler where a big open garage bay needs real heat, not a token warm breeze. In each of those cases the extra output and the flexible discharge give you the muscle and the fit to keep everyone comfortable no matter how the build is laid out.

Dometic has spent decades building RV comfort and climate equipment that holds up to hard, real-world use. Parts and service are widely available, the platform is well proven, and the flexible discharge and ductable design make it one of the more adaptable furnaces in its class. For a bigger rig or a demanding climate, that extra capacity earns its keep fast.

If you want strong, quiet, propane-fired heat with the install flexibility to fit almost any rig, the Dometic 20,000 BTU LP gas furnace is a confident pick. Get it installed before the first hard freeze and you'll stay warm no matter where the road takes you.