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
The Dometic DFMD30111 is the better RV furnace overall, rated 2.9 to 2.6. The Dometic DFMD30121 costs $27.70 less ($1,272.29 vs $1,299.99).
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.
$1,272.29
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 25,000 to 30,000 BTU RV furnace; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dometic DFMD30111 | Dometic DFMD30121 |
|---|---|---|
| Overall rating | 2.9/5 | 2.6/5 |
| Value 40% | 32 $43.33 per 1,000 BTU ($1,299.99, 30,000 BTU) | 33 $42.41 per 1,000 BTU ($1,272.29, 30,000 BTU) |
| Power draw 35% | 43 7.5 A running, 0.2 A per 1,000 BTU | 50 12 V amp draw not published (neutral score used) |
| Warranty 25% | 50 2-year warranty | 0 warranty not published, scored as none |
Specifications
| Dometic DFMD30111 | Dometic DFMD30121 | |
|---|---|---|
| Heat and power | ||
| Input capacity | 30,000 BTU | 30,000 BTU |
| 12 V amp draw | 7.5 A | - |
| Discharge | Ducted | Ducted |
| Fit | ||
| Height | 7.4 in | - |
| Weight | 33.5 lb | - |
| Warranty | ||
| Warranty | 2 years | - |