A tankless heater rated 65,000 BTU for endless hot water in an RV that has the cutout for it.
Amazon $399.99The KingRVer Summit XT 65,000 BTU rates 3.5 among tankless RV water heaters; the Suburban SW6D (5238A) rates 3.1 among tank ones. The KingRVer Summit XT 65,000 BTU costs $40 less ($399.99 vs $439.99).
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.

A 6-gallon steel tank heater on propane for a straight swap in an RV with the matching cutout.
Amazon $439.99Scores side by side
These two sit in different type classes (tankless and tank), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | KingRVer Summit XT 65,000 BTU | Suburban SW6D (5238A) |
|---|---|---|
| Overall rating | 3.5/5 | 3.1/5 |
| Value 40% | 60 $6.15 per 1,000 BTU ($399.99, 65,000 BTU) | 40 $73.33 per gallon of tank ($439.99, 6 gal) |
| Hot water output 35% | 95 up to 3.8 GPM | 51 10.1 gal/h recovery on gas |
| Warranty 25% | 0 warranty not published, scored as none | 50 2-year warranty |
Specifications
| KingRVer Summit XT 65,000 BTU | Suburban SW6D (5238A) | |
|---|---|---|
| Heat and water | ||
| Input capacity | 65,000 BTU | 12,000 BTU |
| Tank size | - | 6 gal |
| Gas recovery | - | 10.1 gal/h |
| Maximum flow | 3.8 GPM | - |
| Fuel | Propane | Propane |
| Fit | ||
| Weight | 20.1 lb | 34 lb |
| Warranty | ||
| Warranty | - | 2 years |