INSTASHOWER 8 PLUS
55K BTU RV Tankless Water Heater
$939.99
$1,011.99
Save $72.00
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A straightforward upgrade from a limited tank heater.
InstaShower 8 Plus delivers 55,000 BTU output and up to 2.9 GPM of continuous hot water. It supports common replacement-door sizes, winter freeze protection and high-altitude operation for everyday RV travel.
View all features ↓Best for mid-size travel trailers and Class C RVs with regular family shower demand and a straightforward tankless replacement.
55,000 BTUOn-demand propane heating
Up to 2.9 GPMContinuous hot-water flow
95–123°FSelectable outlet temperature
Up to 9,800 ftHigh-altitude operation
Secure checkout
More options available at checkout
30-day returns
Free contiguous U.S. shipping
2-year warranty
Choose your InstaShower
Fit and installation
- Minimum clear opening
- 13 × 13 in
- Door options
- 15×15 / 15×18 / 18×18 in
- Fuel
- LP propane
- Electrical supply
- 12V DC
- Water connections
- 1/2 in inlet and outlet
- Maximum altitude
- 9,800 ft
- Size
- 15 × 15 × 14.3 in
- Weight
- 25.6 lbs / 11.6 kg
Choose the door from the opening and exterior trim; the guide covers water, LP propane, 12V and venting.
What’s included
- ✓Water heaterFogatti tankless RV water heater
- ✓Access doorSelected color and door-size configuration
- ✓ControllerWired digital controller
- ✓Safety hardwarePressure-relief and connection components
- ✓DocumentationInstallation hardware and user manual
Package contents follow the selected configuration and variant.
Specifications
- Heat input
- 55,000 BTU
- Maximum flow
- Up to 2.9 GPM
- Temperature range
- 95–123°F
- Fuel
- LP propane
- Electrical supply
- 12V DC
- Minimum opening
- 13 × 13 in
- Maximum altitude
- 9,800 ft
Quick answers
When should I move up to 9 Pro?
Choose 9 Pro for a larger RV, heavier back-to-back use or when the mixing tank and 3.6 GPM platform better
match the household.
Which door size should I choose?
Use the existing cutout and trim dimensions, not the old tank capacity alone.
Can it provide continuous showers?
Yes, provided propane, water pressure and flow remain within the product requirements.
Complete the RV comfort system
Add rooftop cooling or ducted heat selected for the RV roof, cabinet and utilities.
InstaShower 8 Plus
Checkout code--:--:--
$939.99
$1,011.99
Save $72.00
THE BALANCED TANKLESS UPGRADE
Balanced hot water for everyday RV travel
InstaShower 8 Plus delivers 55,000 BTU and up to 2.9 GPM for mid-size travel trailers, Class C motorhomes and households that use hot water regularly but do not need the 9 Pro mixing tank.
55,000 BTUBalanced propane output
Up to 2.9 GPMRegular family shower use
84%Rated efficiency
Up to 9,800 ftHigh-altitude operation
More shower margin than the entry model
8 Plus focuses on continuous showers, common replacement openings and enough output for everyday family use.
CONTINUOUS SHOWERS
Replace tank recovery waits with continuous hot water
As long as propane, pressure and flow remain within the product requirements, the shower is not limited to six or ten stored gallons.
2.9 GPM PLATFORM
Use 2.9 GPM for regular family showers
It is aimed at regular shower use in travel trailers and Class C RVs without paying for the 9 Pro mixing tank.
STAGED COMBUSTION
Adjust burner output as water conditions change
Segmented combustion helps control heat output instead of forcing one fixed flame level across summer and colder travel.
COMMON RETROFIT SIZES
Choose the door that covers the old opening
Choose 15 × 15, 15 × 18 or 18 × 18 based on the actual exterior coverage required.
WHO SHOULD CHOOSE 8 PLUS?
The balanced choice for mid-size RVs
Its 2.9 GPM platform adds flow margin for regular family showers in mid-size rigs.
Travel trailers and Class C RVs
The output aligns well with common mid-size interiors and everyday shower demand.
Couples or small families
It provides more flow margin for repeated showers and routine sink use.
Owners replacing a 6- or 10-gallon tank
Multiple door sizes support a cleaner tank-to-tankless retrofit.
Door options for common RV water-heater openings
Choose 15×15, 15×18 or 18×18 from the existing opening; the guide covers water, LP propane, 12V and venting.
FIT AT A GLANCE
Cutout, trim and utility requirements
The same heater can be ordered with several exterior door sizes for common replacement jobs.
- Minimum opening
- 13 × 13 in
- Door options
- 15×15 / 15×18 / 18×18 in
- Water pressure
- 14.5–116 PSI
- Utilities
- LP propane + 12V DC
- Product size
- 15 × 15.4 × 15 in
A 15 × 15-inch door commonly replaces a 4/6-gallon tank opening; larger existing openings may require 15 × 18 or 18 × 18 coverage.
Compatible RV Models
Coachmen
Apex Ultra-Lite
243FKS
245BHS
265RBSS
Freedom Express
226RBS
238BHS
257BHS
Forest River
Flagstaff Micro Lite
21FBRS
22FBS
25BRDS
Rockwood Mini Lite
2109S
2205S
2509S
2511S
Salem Cruise Lite
24VIEW
263BHXL
273QBXL
Surveyor Legend
240BHLE
252RBLE
260BHLE
Grand Design
Imagine XLS
22MLE
23LDE
24BSE
Imagine
2500RL
2670MK
2800BH
Transcend Xplor
200MK
221RB
247BH
Jayco
Jay Feather
21MML
24BH
25RB
Jay Flight
224BH
225MLS
235MBH
Keystone
Bullet
250BHS
2530RD
260RBS
Cougar Half-Ton
22MLS
25RDS
Passport SL
229RK
240BH
252RD
KZ
Connect
221RBSE
241BHK
261RB
Sportsmen
231RK
260BH
Winnebago
Minnie
2326BH
2529RG
2801BHS
Choose flow from household demand
8 Plus is the balanced middle. 7 suits lighter use, while 9 Pro adds the mixing tank and more flow for larger rigs.
InstaShower 8 Plus
For regular family shower use in travel trailers and Class C RVs.
- Heat input
- 55K BTU
- Flow
- Up to 2.9 GPM
- Best for
- Travel trailers / Class C
InstaShower 7
For compact rigs, warm climates and lighter hot-water demand.
- Heat input
- 48K BTU
- Flow
- Up to 2.5 GPM
- Best for
- Compact RVs / lighter use
InstaShower 9 Pro
For larger RVs, full-time use and heavier demand with a mixing tank.
- Heat input
- 66K BTU
- Flow
- Up to 3.6 GPM
- Best for
- Larger rigs / heavier use
See InstaShower 8 Plus in real RV use
Product overview, full retrofit and official installation guidance in three practical videos.
▶
PRODUCT REVIEW
See the 8 Plus features and replacement fit
A close look at output, door options and where this model sits in the range.
▶
TRAILER INSTALL
Watch an 8 Plus installed in a travel trailer
See the removal, connections, mounting, door and startup process in a real RV.
▶
OFFICIAL GUIDE
Follow Fogatti’s step-by-step installation
Pre-assembly, utility connections, sealing and initial ignition checks.
Why InstaShower 8 Plus is the balanced everyday choice
These answers cover flow, door selection, high-altitude use and when to step up to 9 Pro.
How is 8 Plus different from 7?
8 Plus increases output to 55,000 BTU and flow to 2.9 GPM, giving regular family shower use more margin.
When should I choose 9 Pro?
Move up when the RV is larger, use is heavier or the built-in mixing tank and 3.6 GPM platform better match the household.
Can it replace a Suburban or Atwood tank heater?
It is designed for common replacement openings with door options that cover the exterior cutout and trim.
Can it operate at high altitude?
The product is designed for operation up to 9,800 ft when installed and supplied correctly.
Does it need a new propane system?
It uses LP propane and 12V DC with the line routing, regulator capacity and connections shown in the installation guide.
Ready for balanced on-demand hot water?
Choose the matching color and door size above. The installation guide is available for final fit planning.
This product is rated 4.9 of 5.0 stars.
It has received 172 reviews.
Overall rating: 4.866279 / 5 from 172 reviews.
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Review highlights
Reviews
Installed this to replace
"Installed this to replace a very loud three year old tankless. Install was pretty simple minus the wiring for the panel but that the manufacturer s fault. It is so quiet and heats up the water very fast. I would highly recommend this product!"
Well made. It was
"Well made. It was about 3/16" too wide. My RV guy had to take a saw to my RV sidewall to get it to fit. Installation went well other than that. The user manual does not explain well how this type of water heater works and how to manage with the controller. I took to YouTube videos and received good explanations. I do like that you can set one temperature for the hot water and it will always be exactly that temperature. BUT! I want to wash dishes in hotter water than I shower with. So I will have to change the temperature back and forth. One thing that is worth mentioning is the location of the control panel. My repair guy and I did not have any idea where it should go. He put it on the side of my bedroom cabinet, very near the location of the water heater. Turns out it should be in the bathroom! I had to set a temp, then leave the bedroom, go into the bathroom, run the water and decide if that was a temp I wanted. There was a LOT of back and forth from bedroom to bathroom. I will have someone move it to the bathroom as soon as I can. Even with those factors, it's a good product and I love not having to take military style showers now!"
Love the unit works
"Love the unit works great easy install little short in the wire for controller but other than that very pleased with the quality of the unite"
Works as advertised. . my
"Works as advertised. . my only complaint is I wish the controller had a longer wire . . it would make it mounting inside the Rv a lot better"
Best ever heater fact!
"Best ever heater fact! Unlike the heater that we got with the rv in purchase, fogatti worked instantly! Dometic has been nothing but disappointing! It never worked properly, the propane igniter needed fuse to be replaced and still never worked well, delays, no turning on at all at times! Instantly worked and temp to the point without water running out. The craziest thing is the domestic costs the same! No bypass valve, just winterize and forget! So far no issues ."
Great product seems to
"Great product seems to work well easy to install and customer service was prompt in answering any questions I had. I can definitely see more Fagatti products in my future as needed"
Amazing water heater. We
"Amazing water heater. We have not had any issues with hot water since installing. Love the feature of being able to change the water temperature. We absolutely hated the limited hot water we had with the old water heater. The installation was very easy. The shower capacity, We have been able to take showers without having to turn the water on and off."
Easy to install. Fired
"Easy to install. Fired up immediately. It's pretty straightforward, just remember to order the door kit for your RV if needed. We were able to get it installed and use our old covering with some adjustments to make it work until the kit arrives. Overall I'm impressed with it so far."
Second review and honestly
"Second review and honestly it s perfect! Instal was 20 minutes pop out and pop in! Removed the bypass valve as well! Just great!!!!"
This was one of
"This was one of the easiest upgrades that I did to my camper. Fairly easy out with the old 6-gallon tank and in with the InstaShower 8 Plus. I did install a water shutoff valve in line of the outgoing water (so that it didn't backfeed into the unit), but I already had the extra pex and crimp tools from some other changes I did. Wiring up was easy, fired right up and "just worked". The endless hot water was a welcome change to the typical camper showers we were used to. After a year with the unit - I needed to reach out to support, who went above and beyond to resolve my issue, quickly, hassle free, and I will certainly suggest the Fogatti unit and company to anyone looking to upgrade their hot water experience. Support was amazing to work with, thank you!"