Fogatti InstaShower Ultra (FS10B1SGD)
#10 in TanklessFull review
A tankless heater rated 66,000 BTU for endless hot water in an RV that has the cutout for it.
Amazon $799.99$799.99
The Fogatti InstaShower Ultra (FS10B1SGD) rates 3.0 among tankless RV water heaters; the Dometic WH-16GEA rates 2.8 among tank ones. The Fogatti InstaShower Ultra (FS10B1SGD) costs $120.20 less ($799.99 vs $920.19).
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.
Dometic WH-16GEA
#17 in TankFull review
A 10-gallon aluminum tank heater that runs on propane and electric for a straight swap in an RV with the matching cutout.
Amazon $920.19$920.19
Scores 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 | Fogatti InstaShower Ultra (FS10B1SGD) | Dometic WH-16GEA |
|---|---|---|
| Overall rating | 3.0/5 | 2.8/5 |
| Value 40% | 22 $12.12 per 1,000 BTU ($799.99, 66,000 BTU) | 18 $92.02 per gallon of tank ($920.19, 10 gal) |
| Hot water output 35% | 100 up to 3.9 GPM | 50 recovery rate not published (neutral score used) |
| Warranty 25% | 0 warranty not published, scored as none | 50 2-year warranty |
Specifications
| Fogatti InstaShower Ultra (FS10B1SGD) | Dometic WH-16GEA | |
|---|---|---|
| Heat and water | ||
| Input capacity | 66,000 BTU | - |
| Tank size | - | 10 gal |
| Maximum flow | 3.9 GPM | - |
| Fuel | Propane | Propane + electric |
| Fit | ||
| Weight | - | 25 lb |
| Warranty | ||
| Warranty | - | 2 years |