Fogatti RFS20A0B 20,000 BTU
For a van, truck camper or small trailer where low battery draw outweighs raw heat.
Amazon $899.99$899.99
The Fogatti RFS20A0B 20,000 BTU is the better RV furnace overall, rated 3.0 to 2.0. The Fogatti RFS20A0B 20,000 BTU leads on power draw and value. The Fogatti RFS20A0B 20,000 BTU costs $192.50 less ($899.99 vs $1,092.49).
Prices were last checked November 9, 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.
Dometic DFSD20121
For a van, truck camper or small trailer that needs a low-draw doorless furnace.
Amazon $1,092.49$1,092.49
Which should you buy?
- Choose the Fogatti RFS20A0B 20,000 BTU for power draw (2.9 A running, 0.1 A per 1,000 BTU vs 4.8 A running, 0.3 A per 1,000 BTU) and value ($45 per 1,000 BTU ($899.99, 20,000 BTU) vs $60.69 per 1,000 BTU ($1,092.49, 18,000 BTU)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every under 25,000 BTU RV furnace; a clear win is highlighted. How we rank explains each one.
| Factor weight | Fogatti RFS20A0B 20,000 BTU | Dometic DFSD20121 |
|---|---|---|
| Overall rating | 3.0/5 | 2.0/5 |
| Value 40% | 29 $45 per 1,000 BTU ($899.99, 20,000 BTU) | 5 $60.69 per 1,000 BTU ($1,092.49, 18,000 BTU) |
| Power draw 35% | 89 2.9 A running, 0.1 A per 1,000 BTU | 36 4.8 A running, 0.3 A per 1,000 BTU |
| Warranty 25% | 0 1-year warranty | 0 warranty not published, scored as none |
Specifications
| Fogatti RFS20A0B 20,000 BTU | Dometic DFSD20121 | |
|---|---|---|
| Heat and power | ||
| Input capacity | 20,000 BTU | 18,000 BTU |
| 12 V amp draw | 2.9 A | 4.8 A |
| Discharge | Direct discharge | Ducted |
| Fit | ||
| Height | 11.3 in | 7 in |
| Weight | 25.7 lb | 20.8 lb |
| Warranty | ||
| Warranty | 1 year | - |