The budget 25,000 BTU pick for a smaller trailer, if you accept an unproven brand.
Amazon $699.99
For a like-for-like replacement of the older Dometic medium furnace in a 30 ft trailer.
- 30,000 BTUInput
- 7.5 A12 V draw
- DuctedDischarge
Price checked November 3, 2026. As an Amazon Associate we earn from qualifying purchases.
- Dometic documents 7.5 A draw and a 2-year warranty
- Low-profile with horizontal or vertical mounting
- Highest price per BTU of the 30,000 BTU furnaces at $43 per 1,000 BTU
- Superseded by the DFMDH30111, so stock is dwindling
The Dometic DFMD family
Every Dometic DFMD model we rank, smallest first. Ratings compare each against its own size.
| Model | Input | Rating | Price |
|---|---|---|---|
| Dometic DFMD25111 | 25,000 BTU | 2.1/5 | $1,187.40 |
| Dometic DFMD30111 (this one) | 30,000 BTU | 2.9/5 | $1,299.99 |
| Dometic DFMD30121 | 30,000 BTU | 2.6/5 | $1,272.29 |
How it scores
The rating comes from 3 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | 35524 |
|---|---|
| Heat and power | |
| Input capacity | 30,000 BTU |
| 12 V amp draw | 7.5 A |
| Discharge | Ducted |
| Fit | |
| Height | 7.4 in |
| Weight | 33.5 lb |
| Warranty | |
| Warranty | 2 years |
Alternatives in this size
The lowest-priced new Suburban 30,000 BTU furnace on Amazon, when the original was a Q-series.
Amazon $932.57The straight swap for the many trailers that came with a 30,000 BTU Suburban SF furnace.
Amazon $965.84Compare
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