Review summaries: FOGATTI InstaShower Ultra RV Tankless Water Heater, Built-in Mixing Tank

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Outstanding Performance and Great Looks

Installation is straightforward, though older campers may require modifying the PEX piping. The water takes a few seconds to heat up but then maintains a steady flow at the selected temperature. The unit looks great and delivers strong performance, making it worth the cost.

Pros
  • + easy installation
  • + steady water temperature
  • + great appearance
  • + good value for performance
Cons
  • − takes a few seconds to heat up
  • − may need PEX piping modification in older campers
AI-assisted summary of a verified Amazon customer review. · February 2, 2026 · United States Read original on Amazon ↗
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Compact tankless heater delivers continuous hot water

Chosen to replace an older atmospheric propane heater in a Park Model RV after comparing traditional and on-demand models. After one week of use, the heater is working well, providing continuous and comfortable hot water for showers and dishwashing. Build quality is impressive and installation is easy. So far, performance has met expectations.

Pros
  • + continuous hot water
  • + comfortable for showers and dishwashing
  • + impressive build quality
  • + easy installation
AI-assisted summary of a verified Amazon customer review. · July 15, 2025 · United States Read original on Amazon ↗
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Works well but parts and warranty are slow

This tankless water heater performs well so far, but a vent cover is needed because heavy rain can let water in and damage the control board. For full-time use, replacement parts may take at least a week to arrive, and truck stop showers are costly while waiting for a warranty control board.

Pros
  • + Heats water well so far
Cons
  • − Needs a vent cover to prevent rain damage
  • − Control board can be damaged by water
  • − Warranty parts can take a week or more
  • − Truck stop showers are expensive while waiting
AI-assisted summary of a verified Amazon customer review. · June 16, 2026 · United States Read original on Amazon ↗
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Sleek tankless RV water heater, but fit may vary

This tankless RV water heater has a sleek, modern, high-quality design that looks great in an RV setup. The unit could not be installed because its measurements did not match the intended RV space, which was an oversight on the buyer's part rather than a product flaw. It appears it would perform well, and the attention to detail and overall design are impressive. It is recommended for anyone seeking a high-quality tankless RV water heater, and would be purchased again if the fit were right.

Pros
  • + sleek, modern, high-quality design
  • + impressive attention to detail
  • + seems like it would perform beautifully
Cons
  • − measurements did not match the RV setup
AI-assisted summary of a verified Amazon customer review. · December 20, 2025 · United States Read original on Amazon ↗
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Fits 2019 Forest River Wildwood, Reliable Hot Water

This tankless water heater fits a 2019 Forest River Wildwood and works with the existing 12-volt wiring from a stock 6-gallon unit, providing an interior switch to turn it on and off. It starts immediately when powered and delivers hot water consistently. This is a second unit from the same brand, following one installed in a 2006 Cougar five years earlier. The newer model with a mixing tank is considered the better choice. Overall satisfaction is high.

Pros
  • + fits 2019 Forest River Wildwood
  • + works with stock 12-volt wiring
  • + interior on/off switch
  • + starts immediately
  • + consistent hot water
  • + mixing tank model preferred
AI-assisted summary of a verified Amazon customer review. · March 30, 2026 · United States Read original on Amazon ↗