11 Best Fogatti Tankless Water Heater of 2026 For RV and Home Retrofits

1

FOGATTI RV Tankless Water Heater, 66,000 Highest BTU, RV Hot

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.7
• Brand
  FOGATTI

Key specs3

RV Cutout Compatibility

Fits standard 13x13-inch cabinet cutouts to directly replace 6-gallon Atwood and Suburban tanks, or Girard and Furrion tankless models. Retrofitting a 10-gallon opening requires an optional 18x18-inch door.

High-Altitude Capability

Operates up to 9,800 ft with 300Pa wind resistance

Included Accessories

• Pre-installed 150 PSI pressure relief valve
• Black 15x15-inch exterior access door
• Outer trim ring measuring 17.64x17.64 inches
• Wired digital remote controller with 6.6-foot cord

Pros & cons42

Pros

• Supplies up to 3.6 GPM with 66,000 BTU, supporting simultaneous RV shower and sink use
• Built-in mixing tank stabilizes hot water output to prevent temperature fluctuations
• Includes a 150 PSI relief valve, 15x15-inch door, and a 6.6-foot wired remote
• Maintains heating at elevations up to 9,800 feet with Beaufort scale 9 wind resistance

Cons

• Replacing a 10-gallon tank cutout requires purchasing a separate 18x18-inch door
• Limited to RV propane systems and requires 12V DC power to run the ignition and fan

2

FOGATTI 14kW Tankless Water Heater Electric, 240 Volt On Demand

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.5
• Brand
  FOGATTI

Key specs2

Electrical Supply Needs

• Dedicated 240V circuit
• Single 60A double-pole breaker
• 6 AWG copper wiring
• Standard 1/2-inch NPT plumbing fittings

Flow Rate by Groundwater Temp

Provides up to 3.3 GPM with warm 77 degree Fahrenheit incoming water. If winter groundwater drops to 42 degrees, output must be restricted to a single shower fixture to maintain 110 degrees hot water.

Pros & cons43

Pros

• Up to 98% efficiency with zero venting requirements or fuel tanks to refill
• Delivers up to 3.3 GPM to handle 2 to 3 points of use in moderate climates
• Compact 14.3x9.6x3.5-inch wall-mounted profile fits tight utility closets
• ETL-certified safety system includes integrated overheat and leak protection

Cons

• Requires a heavy-duty 240V circuit with a dedicated 60A breaker and 6 AWG wiring
• Cold 42 degree Fahrenheit inlet water restricts output down to a single shower fixture
• Incompatible with standard 120V household outlets or RV battery systems

3

FOGATTI InstaShower 9 Pro RV Tankless Water Heater, Built-in Mixing

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.4
• Brand
  FOGATTI

Key specs2

RV Cutout Compatibility

Engineered for 13x13-inch openings to swap out 6-gallon Suburban and Atwood tank heaters. An 18x18-inch door kit is necessary if replacing a 10-gallon water heater cabinet.

Included Accessories

• White 15x15-inch outer door panel
• 17.64x17.64-inch decorative trim ring
• Built-in 150 PSI pressure relief valve
• Intelligent remote controller with 6.6-foot wire

Pros & cons42

Pros

• Produces up to 3.6 GPM and 66,000 BTU for multi-fixture RV hot water demand
• Internal mixing tank smooths out water temperature swings within 1 degree Fahrenheit
• Comes complete with a white 15x15-inch door, 17.64-inch trim ring, and remote
• Operates reliably at 9,800-foot altitudes and stands up to Beaufort 9 wind speeds

Cons

• Demands an optional 18x18-inch retrofit door when replacing a larger 10-gallon tank
• Requires dedicated propane plumbing and a 12V DC RV power connection

4

FOGATTI Tankless Water Heater Gas Propane Indoor On Demand CSA

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.2
• Brand
  FOGATTI

Key specs2

Indoor Venting and Gas Setup

Requires permanent indoor wall mounting with dedicated gas exhaust venting, standard liquid propane supply, and a 120V AC electrical outlet for the electronic controls.

Simultaneous Outlet Capacity

5.1 GPM supports 2 to 4 fixtures at once

Pros & cons42

Pros

• 120,000 BTU propane burner provides 5.1 GPM to run 2 to 4 indoor fixtures at once
• Four-stage combustion and water servo tech regulate water temp within 1 degree Fahrenheit
• CSA-certified design features a durable copper heat exchanger and stainless steel burner
• Operates on water pressures as low as 15 PSI using standard 120V AC household power

Cons

• Requires dedicated indoor gas venting and LP gas supply lines that RVs cannot fit
• Higher fuel volume demands proper propane tank sizing to prevent pressure freeze-up

5

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

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.2
• Brand
  FOGATTI

Key specs2

Low Flow Activation

Activates at just 0.5 GPM, enabling hot water flow during low-volume sink use without cycling the burner off, which helps conserve water during off-grid dry camping.

High-Altitude Capability

9,800 ft rated with HydroShield weatherproofing

Pros & cons42

Pros

• High 3.9 GPM flow rate backed by 66,000 BTU provides top-tier RV hot water volume
• Low 0.5 GPM startup flow preserves water and battery power while boondocking
• HydroShield-Tech weather resistance provides stormproof wind and elevation reliability
• Internal mixing chamber eliminates hot and cold spikes between shower cycles

Cons

• Fitting into a 10-gallon tank opening requires buying an 18x18-inch retrofit kit
• Confined to 12V DC RV electrical systems and liquid propane fuel supplies

6

FOGATTI Propane Gas Tankless Water Heater Outdoor - Max 5.1

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.8
• Brand
  FOGATTI

Key specs2

Outdoor Propane Installation

Mounts to an exterior wall to exhaust directly into open air without indoor flue piping. Water connections must be protected in freezing weather, and temperature is controlled from an indoor remote.

Simultaneous Outlet Capacity

5.1 GPM handles 2 to 4 faucets or showers

Pros & cons42

Pros

• Outdoor wall-mount design eliminates the need for expensive indoor exhaust ducting
• Generates 5.1 GPM at 120,000 BTU to support 2 to 4 residential fixtures
• Includes an indoor-mounted remote control panel for convenient temperature setting
• Built with a heavy-duty copper heat exchanger and CSA safety certification

Cons

• Must be mounted outdoors with exterior plumbing exposed to ambient winter freezing
• Requires outdoor liquid propane supply and an accessible 120V AC electrical outlet

7

Fogatti Tankless Water Heater Electric 11kw 240V Max 2.6GPM 1

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.6
• Brand
  FOGATTI

Key specs2

Electrical Supply Needs

• 240V dedicated electrical connection
• Single 50A breaker
• 8 AWG copper supply wiring
• 1/2-inch NPT water connections

Single-Point Performance Limits

Delivers 2.6 GPM under warm 77 degree Fahrenheit inlet conditions, but colder inlet water restricts heating to a single faucet or shower head to maintain your target set temperature.

Pros & cons43

Pros

• High 98% efficiency electric design eliminates propane tanks and combustion venting
• Compact wall-mount footprint fits inside small cabins, tiny homes, or apartments
• Precise digital temperature control from 86 to 140 degrees Fahrenheit via LED display
• ETL certified with built-in overheat protection and leak detection

Cons

• Limited 2.6 GPM capacity drops to a single fixture when incoming water is cold
• Requires a 240V dedicated line with a 50A breaker and 8 AWG copper wire
• Not compatible with 120V household outlets or RV 12V battery power

8

FOGATTI Natural Gas Tankless Water Heater Outdoor - Max 5.1

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.6
• Brand
  FOGATTI

Key specs2

Fuel and Mounting Requirement

Configured strictly for residential natural gas lines and outdoor exterior mounting. Operates on 15 to 150 PSI water pressure and requires standard 120V AC household power.

Multi-Point Fixture Support

120,000 BTU supports 2 to 4 outlets at 5.1 GPM

Pros & cons42

Pros

• Runs on residential natural gas lines, eliminating the hassle of refilling propane tanks
• Delivers 5.1 GPM at 120,000 BTU to power 2 to 4 simultaneous hot water outlets
• Outdoor cabinet mount frees up interior utility closet space and requires no indoor flue
• Features an indoor wired remote control for adjusting heat settings from inside

Cons

• Incompatible with propane supply lines without a proper gas conversion
• Exterior water line connections require winterization in freezing climates

9

FOGATTI RV Tankless Water Heater, with 15 x 15 inches

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.4
• Brand
  FOGATTI

Key specs2

Direct 6-Gallon Replacement

Drops directly into standard 13x13-inch RV cutouts to replace Suburban or Atwood 6-gallon tanks, including a 15x15-inch black door and pre-installed 150 PSI safety valve.

Propane Heating Output

55,000 BTU delivering up to 2.9 GPM

Pros & cons42

Pros

• Direct drop-in fit for standard 13x13-inch RV cutouts with black 15x15 door included
• High-altitude mode delivers reliable 55,000 BTU heating up to 9,800 feet elevation
• Staged combustion adjusts summer flame to save propane and prevent scalding
• Pre-installed 150 PSI pressure relief valve saves extra plumbing hardware expense

Cons

• Maximum 2.9 GPM flow rate is lower than Gen 3 and Ultra RV models
• Lacks the internal buffer mixing tank found on the InstaShower 9 Pro and Ultra lines

10

FOGATTI Tankless Water Heater Gas Propane Indoor On Demand CSA

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  8.1
• Brand
  FOGATTI

Key specs2

Whole-Home Propane Capacity

With 170,000 BTU and up to 7.5 GPM flow, this unit delivers hot water to 3 to 5 fixtures at once, making it suitable for multi-bathroom homes with high concurrent hot water demand.

Indoor Utility Requirements

• Dedicated indoor exhaust flue system
• High-capacity liquid propane supply line
• Standard 120V AC electrical power
• 15 to 150 PSI municipal or well water pressure

Pros & cons42

Pros

• High-output 170,000 BTU burner supplies 7.5 GPM for 3 to 5 simultaneous fixtures
• Four-stage combustion and water servo keep water temperature within 1 degree Fahrenheit
• Copper heat exchanger and 304 stainless steel burner ensure long-lasting durability
• Operates across water pressures from 15 to 150 PSI using standard 120V AC power

Cons

• Large physical cabinet and high BTU output demand dedicated indoor gas flue venting
• Requires high-capacity propane lines and tank setups to handle heavy gas draw

11

FOGATTI RV Tankless Water Heater, 3 Optional Door Sizes 15"x15",

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  7.7
• Brand
  FOGATTI

Key specs2

Retrofit Door Requirements

The bare unit does not bundle an exterior door. Buyers must select and purchase a separate 15x15, 15x18, or 18x18-inch door kit to match their RV sidewall cutout.

Freeze and Wind Protection

• Integrated forced exhaust fan on top
• Automatic gas shutoff on flame failure
• Antifreeze protection rated down to -22 degrees Fahrenheit
• 9,800-foot high-altitude operating mode

Pros & cons42

Pros

• Budget-friendly entry point for RV tankless conversion with 48,000 BTU heating
• Operates reliably up to 9,800 feet with staged combustion and anti-scald protection
• Built-in antifreeze protection safeguards the heat exchanger down to -22 degrees Fahrenheit
• Pre-installed 150 PSI relief valve and 6.6-foot digital remote included in the box

Cons

• Exterior replacement door is not included and must be purchased separately
• Output is limited to 2.5 GPM, restricting hot water use to one fixture at a time

Last update on 2026-10-16 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Will a Fogatti RV tankless water heater fit my existing cabinet cutout?

Yes, provided your opening matches standard RV cutout dimensions. Models such as the InstaShower 8 Plus are engineered for a 13 x 13 inch opening and include a 15 x 15 inch exterior door. If you are replacing an older tank with a larger wall cutout, select units offer retrofit door packages in 15 x 18 inch and 18 x 18 inch sizes in black and white. Always check your exterior wall cutout and verify depth clearance before mounting.

What electrical service is required for Fogatti electric tankless water heaters?

Fogatti electric models require a dedicated 240-volt circuit and are not compatible with 120-volt wiring. The 11kW model demands a single 50-amp breaker with 8 AWG wiring, while the 14kW model requires a single 60-amp breaker with 6 AWG wiring. Both use 1/2-inch NPT plumbing fittings. If you are planning an indoor electrical installation, check our guide on matching an electric tankless water heater to your panel capacity.

Do Fogatti RV water heaters stay lit at high elevations?

Yes, designated Fogatti RV models maintain steady operation up to 9,800 feet. Units like the InstaShower 8 Plus and InstaShower 9 Pro feature a dedicated high-altitude mode and an advanced heat exchange system to prevent burner dropouts in thin air. Standard RV gas burners often experience incomplete combustion at mountain elevations, so confirm high-altitude suitability if you camp at higher elevations.

What water flow rate is needed to trigger hot water production?

Activation starts at a minimum of 0.5 GPM on equipped models. The InstaShower Ultra RV unit utilizes 0.5 GPM ultra-low flow startup technology, which lets the burner ignite even during water-saving tasks. Similarly, the 11kW electric model requires a 0.5 GPM flow rate to activate heating. If a faucet restriction or low-flow plumbing line delivers less than this threshold, the heater will not engage.

Can Fogatti residential gas models be mounted indoors?

It depends entirely on the model design. Fogatti produces indoor-rated CSA-certified propane units in 5.1 GPM and 7.5 GPM configurations. In contrast, the Instagas Comfort 120S series delivers 120,000 BTU in outdoor propane or natural gas formats and is designated strictly for outdoor installation. Always verify whether a unit specifies indoor CSA venting or outdoor installation before connecting gas lines.

How does a built-in mixing tank prevent shower temperature spikes?

A built-in mixing tank stabilizes water temperature at the outlet to eliminate sudden hot or cold fluctuations. In RV models like the InstaShower 9 Pro and InstaShower Ultra, the internal tank blends the water stream while providing up to 66,000 BTU of output. This internal buffer prevents the cold-water sandwich effect that happens when you toggle the showerhead off and on while lathering.