FOGATTI RV Tankless Water Heater InstaShower 9 Pro — 3.6 GPM, 66,000 BTU, Built-in Mixing Tank, Retrofit-Ready

FOGATTI InstaShower 9 Pro is a high-capacity RV tankless water heater that delivers up to 3.6 GPM of instant hot water and includes a built-in mixing tank for stable temperatures.

This compact, retrofit-ready unit replaces many conventional RV heaters and tankless models while offering stronger flow, rapid temperature stabilization and advanced safety features. Designed for caravans, motorhomes and travel trailers, the InstaShower 9 Pro uses a 66,000 BTU burner, upgraded fan technology and a precision mixing tank to give reliable hot water in kitchens and bathrooms without the wait that comes with tank systems.

How much hot water flow and power does this RV heater provide?

The InstaShower 9 Pro produces up to 3.6 gallons per minute from its 66,000 BTU heat source, enough for simultaneous bathroom and kitchen use for most RV setups. Its enhanced heat exchanger and burner design maintain output across a range of conditions so users experience steady flow and temperature.

• Maximum flow: 3.6 GPM for continuous hot water.
• Heat output: 66,000 BTU for rapid heating.
• Precision control: temperature within ±1°F.
• Seasonal flame modulation: conserves heat in summer, boosts in winter.

Can I install the InstaShower 9 Pro in place of my existing RV heater?

Yes — the unit is built to retro-fit common RV heater openings. A 13" × 13" cutout accepts many Suburban and Atwood 6-gallon replacements; with an 18" × 18" door it can stand in for larger 10-gallon tanks and replace other tankless brands when space allows.

• Standard fit: 13"×13" opening compatibility.
• Optional retrofit: 18"×18" door for larger replacements.
• Includes 15"×15" door and 17.64"×17.64" trim ring.
• Works as an upgrade from both tank and tankless OEM units.

How does the InstaShower handle altitude, wind and debris?

FOGATTI engineered the InstaShower 9 Pro to perform reliably at high elevation and exposed locations. Its upgraded NIDEC fan produces strong static pressure and the unit features a top-mounted forced exhaust and internal filter screen to keep combustion and water systems clean.

• High-altitude ready: operates smoothly up to 9,800 feet.
• Robust fan: 300Pa output tolerates windy conditions.
• Filter screen: removes large particles from incoming water.
• Forced exhaust and flame safety shut-off for stable combustion.

What safety and convenience features are included?

The InstaShower 9 Pro ships with components that save time and extra purchases, plus built-in protections to reduce service needs. A pressure relief valve, intelligent remote controller and anti-freeze safeguards are all provided to simplify installation and operation.

• Included 150 PSI pressure relief valve for immediate installation.
• Intelligent remote controller works up to 6.6 feet away.
• Anti-freeze protection and automatic gas shut-off for flame failure.
• CSA certification and multiple safety interlocks.

Who is this for? The FOGATTI InstaShower 9 Pro is aimed at RV owners who want strong, continuous hot water without the wait of a tank, and who need a unit that handles high altitudes, wind and rough road conditions. It’s a practical upgrade for people replacing older 6- or 10-gallon tank heaters, swapping out competing tankless models, or outfitting larger rigs that require dependable shower and sink performance. Installers and DIYers will appreciate the included door, trim ring and pressure relief valve that reduce additional parts purchases.