Suburban NT-20SEQ (2504ABK)
For a camper van or small trailer with one open room, where battery drain matters more than total heat.
Amazon $837.44$837.44
The Suburban NT-20SEQ (2504ABK) is the better RV furnace overall, rated 3.4 to 2.0. The Suburban NT-20SEQ (2504ABK) leads on power draw and value. The Suburban NT-20SEQ (2504ABK) costs $255.05 less ($837.44 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 Suburban NT-20SEQ (2504ABK) for power draw (2.8 A running, 0.1 A per 1,000 BTU vs 4.8 A running, 0.3 A per 1,000 BTU) and value ($44.08 per 1,000 BTU ($837.44, 19,000 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 | Suburban NT-20SEQ (2504ABK) | Dometic DFSD20121 |
|---|---|---|
| Overall rating | 3.4/5 | 2.0/5 |
| Value 40% | 30 $44.08 per 1,000 BTU ($837.44, 19,000 BTU) | 5 $60.69 per 1,000 BTU ($1,092.49, 18,000 BTU) |
| Power draw 35% | 88 2.8 A running, 0.1 A per 1,000 BTU | 36 4.8 A running, 0.3 A per 1,000 BTU |
| Warranty 25% | 50 2-year warranty | 0 warranty not published, scored as none |
Specifications
| Suburban NT-20SEQ (2504ABK) | Dometic DFSD20121 | |
|---|---|---|
| Heat and power | ||
| Input capacity | 19,000 BTU | 18,000 BTU |
| 12 V amp draw | 2.8 A | 4.8 A |
| Airflow | 150 CFM | - |
| Discharge | Direct discharge | Ducted |
| Fit | ||
| Height | 9.4 in | 7 in |
| Weight | - | 20.8 lb |
| Warranty | ||
| Warranty | 2 years | - |