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FOGATTI InstaShower Ultra is a high-performance RV tankless water heater built for families who need reliable, on-demand hot water in demanding outdoor conditions. Delivering up to 66,000 BTU and 3.9 GPM, it supports back-to-back showers and kitchen use with stable temperature control, reduced fluctuations, and consistent performance across altitude and weather changes.
- 66,000 BTU / 3.9 GPM delivers hot water for multiple showers
- ±1°F temperature variation
- Operates up to 9,800 ft elevation for mountain RV travel
- 0.5 GPM minimum activation flow rate for improved water
- RV-Ready Design:Windproof, waterproof, and freeze-resistant
Complete your kit
FREE Shipping, 3-5 Days FedEX / UPS Delivery

66,000BTU Instant Heating

Pre-Mix System

Segmented Combustion




Windproof and Waterproof Design

Stable Operation up to 9,800 ft



Enjoy Comfortable Shower

Upgrade RV Hot Water System



Dimensions of Installation

Installation Instructions



We are #1 RV Tankless
More and more RV owners and businesses are choosing "Fogatti" over any other tankless water heater brand.They choose us for our high-quality standards in RV water heating, our genuinely satisfying after-sales service,and because our RV manufacturing technology has reached its pinnacle.
Businesses that depend on Tankless Water Heater rely on Fogatti














This product is rated 5.0 of 5.0 stars.
It has received 20 reviews.













































