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 2.9. The Suburban NT-30SP leads on value and power draw. The Suburban NT-30SP costs $268.19 less ($697.65 vs $965.84).
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 NT-30SP for value ($23.25 per 1,000 BTU ($697.65, 30,000 BTU) vs $32.19 per 1,000 BTU ($965.84, 30,000 BTU)) and power draw (5.5 A running, 0.2 A per 1,000 BTU vs 7 A running, 0.2 A per 1,000 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-30FQ (2558A) |
|---|---|---|
| Overall rating | 3.5/5 | 2.9/5 |
| Value 40% | 80 $23.25 per 1,000 BTU ($697.65, 30,000 BTU) | 55 $32.19 per 1,000 BTU ($965.84, 30,000 BTU) |
| Power draw 35% | 72 5.5 A running, 0.2 A per 1,000 BTU | 51 7 A running, 0.2 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-30FQ (2558A) | |
|---|---|---|
| Heat and power | ||
| Input capacity | 30,000 BTU | 30,000 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 |