Dometic DFMD30111
For a like-for-like replacement of the older Dometic medium furnace in a 30 ft trailer.
Amazon $1,299.99$1,299.99
2.6/5
For a Dometic swap where the RV has no outside furnace door.
- 30,000 BTUInput
- DuctedDischarge
Check price at Amazon$1,272.29
Price checked November 3, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Doorless version for RVs with no exterior furnace door
- 30,000 BTU, the same size as the doored DFMD30111
Cons
- No amp draw or weight found
- $42 per 1,000 BTU
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 | 30,000 BTU | 2.9/5 | $1,299.99 |
| Dometic DFMD30121 (this one) | 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 | DFMD30121 |
|---|---|
| Heat and power | |
| Input capacity | 30,000 BTU |
| Discharge | Ducted |
Alternatives in this size
Suburban SF-30FQ (2558A)
The straight swap for the many trailers that came with a 30,000 BTU Suburban SF furnace.
Amazon $965.84$965.84
$1,187.40
Compare
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