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 and the Suburban SF-30FQ (2558A) are evenly matched, rated 2.9 and 2.9. The Suburban SF-30FQ (2558A) wins on value. The Suburban SF-30FQ (2558A) costs $334.15 less ($965.84 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.
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
Which should you buy?
- Choose the Suburban SF-30FQ (2558A) for value ($32.19 per 1,000 BTU ($965.84, 30,000 BTU) vs $43.33 per 1,000 BTU ($1,299.99, 30,000 BTU)).
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 | Suburban SF-30FQ (2558A) |
|---|---|---|
| Overall rating | 2.9/5 | 2.9/5 |
| Value 40% | 32 $43.33 per 1,000 BTU ($1,299.99, 30,000 BTU) | 55 $32.19 per 1,000 BTU ($965.84, 30,000 BTU) |
| Power draw 35% | 43 7.5 A running, 0.2 A per 1,000 BTU | 51 7 A running, 0.2 A per 1,000 BTU |
| Warranty 25% | 50 2-year warranty | 0 warranty not published, scored as none |
Specifications
| Dometic DFMD30111 | Suburban SF-30FQ (2558A) | |
|---|---|---|
| Heat and power | ||
| Input capacity | 30,000 BTU | 30,000 BTU |
| 12 V amp draw | 7.5 A | 7 A |
| Airflow | - | 300 CFM |
| Discharge | Ducted | Ducted |
| Fit | ||
| Height | 7.4 in | 7.5 in |
| Weight | 33.5 lb | - |
| Warranty | ||
| Warranty | 2 years | - |