Suburban NT-30SP
For a replacement where the old NT-series furnace sat in a deep cabinet and low amp draw matters.
Amazon $697.65$697.65
The Suburban NT-30SP is the better RV furnace overall, rated 3.5 to 2.5. The Suburban NT-30SP leads on power draw and value. The Suburban NT-30SP costs $216.08 less ($697.65 vs $913.73).
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.
Suburban SF-25Q (2556A)
A like-for-like replacement for a 25,000 BTU Suburban SF furnace in a mid-size trailer.
Amazon $913.73$913.73
Which should you buy?
- Choose the Suburban NT-30SP for power draw (5.5 A running, 0.2 A per 1,000 BTU vs 7 A running, 0.3 A per 1,000 BTU) and value ($23.25 per 1,000 BTU ($697.65, 30,000 BTU) vs $36.55 per 1,000 BTU ($913.73, 25,000 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 | Suburban NT-30SP | Suburban SF-25Q (2556A) |
|---|---|---|
| Overall rating | 3.5/5 | 2.5/5 |
| Value 40% | 80 $23.25 per 1,000 BTU ($697.65, 30,000 BTU) | 45 $36.55 per 1,000 BTU ($913.73, 25,000 BTU) |
| Power draw 35% | 72 5.5 A running, 0.2 A per 1,000 BTU | 30 7 A running, 0.3 A per 1,000 BTU |
| Warranty 25% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Suburban NT-30SP | Suburban SF-25Q (2556A) | |
|---|---|---|
| Heat and power | ||
| Input capacity | 30,000 BTU | 25,000 BTU |
| 12 V amp draw | 5.5 A | 7 A |
| Airflow | 345 CFM | 300 CFM |
| Discharge | Ducted | Ducted |
| Fit | ||
| Height | 12.5 in | 7.5 in |