Suburban NT-20SEQ (2504ABK)
For a camper van or small trailer with one open room, where battery drain matters more than total heat.
Amazon $839.91$839.91
The Suburban NT-20SEQ (2504ABK) is the better RV furnace overall, rated 3.4 to 1.8. The Suburban NT-20SEQ (2504ABK) leads on power draw. The Suburban NT-20SEQ (2504ABK) costs $111.27 less ($839.91 vs $951.18).
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-20FQ (2551A)
A like-for-like replacement for an older 20,000 BTU Suburban SF furnace in a small trailer.
Amazon $951.18$951.18
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 7 A running, 0.3 A per 1,000 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) | Suburban SF-20FQ (2551A) |
|---|---|---|
| Overall rating | 3.4/5 | 1.8/5 |
| Value 40% | 30 $44.21 per 1,000 BTU ($839.91, 19,000 BTU) | 24 $47.56 per 1,000 BTU ($951.18, 20,000 BTU) |
| Power draw 35% | 88 2.8 A running, 0.1 A per 1,000 BTU | 0 7 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) | Suburban SF-20FQ (2551A) | |
|---|---|---|
| Heat and power | ||
| Input capacity | 19,000 BTU | 20,000 BTU |
| 12 V amp draw | 2.8 A | 7 A |
| Airflow | 150 CFM | 300 CFM |
| Discharge | Direct discharge | Ducted |
| Fit | ||
| Height | 9.4 in | 7.5 in |
| Weight | - | 29 lb |
| Warranty | ||
| Warranty | 2 years | - |