Suburban SF-35VHQ (2588A)
The standard replacement for a 35,000 BTU Suburban SF furnace where the exterior service door stays.
Amazon $929.99$929.99
Most RVs, travel trailers and campers heat with a built-in propane furnace that sits in a cabinet cutout and pushes warm air through short duct runs or a grille. When one fails, replacing it is usually a swap within the same cutout, so the real choices are size, price and how much of your battery it uses. These rankings compare what the makers and sellers publish on the same terms.
Size comes first. A 25,000 to 30,000 BTU furnace suits most travel trailers up to about 33 ft; 35,000 BTU and up suits long trailers, fifth wheels and cold-weather use, and under 25,000 BTU suits vans and small campers.
Amp draw matters off the grid. The blower runs on 12 V DC, so a furnace that draws 7 A drains a battery bank far faster overnight than one that draws 3 A. Many sellers don’t publish the figure, and the product page says so when that’s the case.
Cutout and door decide whether a unit fits. Check your cutout size, whether your RV has an exterior service door, and whether the furnace is ducted or direct discharge before you buy. Replacement cores sold without the housing and blower aren’t ranked.
Prices were last checked November 4, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Top Picks
KingRVer HF35-E 35,000 BTU
The cheapest 35,000 BTU furnace per BTU for a 28 to 38 ft trailer, on trust in a new brand.
Amazon $599.97$599.97
Suburban NT-20SEQ (2504ABK)
For a camper van or small trailer with one open room, where battery drain matters more than total heat.
Amazon $839.91$839.91
Shop by Size
Under 25,000 BTU
3 rankedUnder 25,000 BTU: vans, truck campers and small trailers, or one zone of a larger rig.
Top rated: Suburban NT-20SEQ (2504ABK) $839.91
25,000 to 30,000 BTU
11 ranked25,000 to 30,000 BTU: the common size for travel trailers and campers up to about 33 ft.
Top rated: Suburban NT-30SP $697.65
35,000 BTU and up
8 ranked35,000 BTU and up: long trailers, fifth wheels and motorhomes in cold climates.
Top rated: Suburban SF-35VHQ (2588A) $929.99
Narrow It Down
By budget
By feature
Deals
Best Small RV Furnaces
- Suburban NT-20SEQ (2504ABK)#1 of 3Full review
For a camper van or small trailer with one open room, where battery drain matters more than total heat.
Amazon $839.91$839.9119,000 BTU2.8 A150 CFM - Fogatti RFS20A0B 20,000 BTU#2 of 3Full review
For a van, truck camper or small trailer where low battery draw outweighs raw heat.
Amazon $899.99$899.9920,000 BTU2.9 A- - Suburban SF-20FQ (2551A)#3 of 3Full review
A like-for-like replacement for an older 20,000 BTU Suburban SF furnace in a small trailer.
Amazon $951.18$951.1820,000 BTU7 A300 CFM
Best 30,000 BTU RV Furnaces
- Suburban NT-30SP#1 of 11Full review
For a replacement where the old NT-series furnace sat in a deep cabinet and low amp draw matters.
Amazon $697.65$697.6530,000 BTU5.5 A345 CFM - KingRVer HF30-E 30,000 BTU#2 of 11Full review
A budget 30,000 BTU complete furnace for a 24 to 33 ft trailer.
Amazon $649.99$649.9930,000 BTU-260 CFM - Fogatti RF030A0N 30,000 BTU#3 of 11Full review
A low-priced 30,000 BTU furnace for a budget replacement.
Amazon $679.99$679.9930,000 BTU-260 CFM - KingRVer HF25-E 25,000 BTU#4 of 11Full review
A budget 25,000 BTU complete furnace for a 20 to 28 ft trailer.
Amazon $599.99$599.9925,000 BTU-240 CFM - Suburban SF-30VHFQ (2576A)#5 of 11Full review
For a 30,000 BTU doorless swap in a trailer with no exterior furnace door.
Amazon $1,146.49$1,146.4930,000 BTU--
Best 35,000 BTU RV Furnaces
- Suburban SF-35VHQ (2588A)#1 of 8Full review
The standard replacement for a 35,000 BTU Suburban SF furnace where the exterior service door stays.
Amazon $929.99$929.9935,000 BTU8 A- - KingRVer HF35-E 35,000 BTU#2 of 8Full review
The cheapest 35,000 BTU furnace per BTU for a 28 to 38 ft trailer, on trust in a new brand.
Amazon $599.97$599.9735,000 BTU-320 CFM - Suburban SF-42VHQ (2592A)#3 of 8Full review
For big fifth wheels and motorhomes that need a single large furnace.
Amazon $1,138.76$1,138.7640,000 BTU9 A- - Suburban SF-42VHFQ#4 of 8Full review
For a 40,000 BTU furnace in an RV with no exterior door and a long duct run.
Amazon $1,185.98$1,185.9840,000 BTU-- - Fogatti RF035A0N 35,000 BTU#5 of 8Full review
A low-priced 35,000 BTU furnace with variable output for a cold-weather trailer.
Amazon $699.99$699.9935,000 BTU-320 CFM
How We Rank
Each furnace is ranked against others of the same size, and scored on its price per 1,000 BTU, its 12 V amps per 1,000 BTU and its warranty.
| Factor | Measures | Weight |
|---|---|---|
| Value | price per 1,000 BTU of input | 40% |
| Power draw | 12 V amps per 1,000 BTU, which is battery drain on a dry camp | 35% |
| Warranty | warranty on the furnace | 25% |
How we rank explains each factor in full.