Fogatti InstaShower 9 Pro (FS10B1S)
#13 in TanklessFull review
A tankless heater rated 66,000 BTU for endless hot water in an RV that has the cutout for it.
Amazon $639.99$639.99
The Fogatti InstaShower 9 Pro (FS10B1S) is the better RV water heater overall, rated 3.0 to 2.6. The Fogatti InstaShower 9 Pro (FS10B1S) leads on hot water output. The Fogatti InstaShower 8 Plus (FS08B1SBD) costs $120 less ($519.99 vs $639.99).
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.
Fogatti InstaShower 8 Plus (FS08B1SBD)
#15 in TanklessFull review
A tankless heater rated 55,000 BTU for endless hot water in an RV that has the cutout for it.
Amazon $519.99$519.99
Which should you buy?
- Choose the Fogatti InstaShower 9 Pro (FS10B1S) for hot water output (up to 3.6 GPM vs up to 2.9 GPM).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every tankless RV water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Fogatti InstaShower 9 Pro (FS10B1S) | Fogatti InstaShower 8 Plus (FS08B1SBD) |
|---|---|---|
| Overall rating | 3.0/5 | 2.6/5 |
| Value 40% | 35 $9.70 per 1,000 BTU ($639.99, 66,000 BTU) | 36 $9.45 per 1,000 BTU ($519.99, 55,000 BTU) |
| Hot water output 35% | 84 up to 3.6 GPM | 47 up to 2.9 GPM |
| Warranty 25% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Fogatti InstaShower 9 Pro (FS10B1S) | Fogatti InstaShower 8 Plus (FS08B1SBD) | |
|---|---|---|
| Heat and water | ||
| Input capacity | 66,000 BTU | 55,000 BTU |
| Maximum flow | 3.6 GPM | 2.9 GPM |
| Fuel | Propane | Propane |
| Fit | ||
| Weight | 30.9 lb | - |