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 2.6. The Suburban NT-30SP leads on value. The Suburban NT-30SP costs $574.64 less ($697.65 vs $1,272.29).
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.
$1,272.29
Which should you buy?
- Choose the Suburban NT-30SP for value ($23.25 per 1,000 BTU ($697.65, 30,000 BTU) vs $42.41 per 1,000 BTU ($1,272.29, 30,000 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 | Dometic DFMD30121 |
|---|---|---|
| Overall rating | 3.5/5 | 2.6/5 |
| Value 40% | 80 $23.25 per 1,000 BTU ($697.65, 30,000 BTU) | 33 $42.41 per 1,000 BTU ($1,272.29, 30,000 BTU) |
| Power draw 35% | 72 5.5 A running, 0.2 A per 1,000 BTU | 50 12 V amp draw not published (neutral score used) |
| Warranty 25% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Suburban NT-30SP | Dometic DFMD30121 | |
|---|---|---|
| Heat and power | ||
| Input capacity | 30,000 BTU | 30,000 BTU |
| 12 V amp draw | 5.5 A | - |
| Airflow | 345 CFM | - |
| Discharge | Ducted | Ducted |
| Fit | ||
| Height | 12.5 in | - |