Gen II Ranein RV Tankless Water Heater 65,000 BTU, On-Demand Propane Hot Water, Thermostatic Mixing Chamber, External Showerhead, High Altitude Ready, CSA, Ideal for Simultaneous Use and Family Use
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Availability:
In Stock.
Arrives
Friday, Jul 24
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Color: Silver
Set name: RA65SH
Features
- Instant Continuous Hot Water More Power, More Flow: Powered by a 65,000 BTU high-output burner, this unit heats water faster than lower-BTU RV heaters, delivering stable temperatures even in cold weather. With up to 3.9 GPM, it provides stronger flow and pressure than low-flow models, supporting simultaneous faucet use without drop-off. Higher BTU and GPM ensure longer, uninterrupted showers with fewer temperature swings. Precision control from 95F124F and staged combustion improve efficiency, prevent summer overheating, and extend propane runtimeideal for RV families needing reliable hot water.
- Easy Replacement: Fits standard RV cutouts and replaces most Suburban & Atwood 6/10/12-gallon tank water heaters with a 12.8" 12.8" opening. Exterior door not included; optional door kits (15" 15", 15" 18", or 18" 18") sold separately.
- Thermostatic Mixing Chamber: Thermostatic Chamber Technology dynamically balances heat output to deliver stable water temperatures, reducing fluctuations caused by changing water demand and enabling reliable, simultaneous hot water use for the whole family.
- Pet-Friendly Shower Kit: The included shower head makes it simple to bathe your pets or clean muddy gear anywhere your journey takes you.
- Enhanced for Your Convenience: The upgraded multi-function remote provides real-time visibility into gas consumption, voltage, water flow (GPM), and anti-freeze activation, and is optimized for reliable performance at altitudes up to 9,800 ft.
- Safe & Reliable: Designed with a top-mounted exhaust fan to ensure stable combustion, plus flame failure protection with automatic gas shut-off. The integrated anti-freeze function activates below 42.8F to protect internal components. CSA certified, with a built-in pressure relief valve included.
- Ideal For: Full-time RVers who need reliable hot water, campers who enjoy extended showers, Cold climate travelers who need freeze protection and families or multiple users who need simultaneous hot water use.
- RV-READY DESIGN & 12V POWERED: 12V DC powered system integrates with RV electrical setups and supports common RV plumbing connections designed specifically for rv living and travel trailers.
- Oxygen-Free Copper for Durability & Efficiency: Built with an oxygen-free copper heat exchanger, this RV hot water heater delivers fast, efficient heat transfer and long-term durability. The corrosion-resistant copper structure ensures reliable performance over time.
Brand: Ranein
Capacity: 10 Gallons
Power Source: Liquid Propane
Product Dimensions: 15"W x 15"H
Special Feature: Anti-Freezing Protection, Dry Combustion Protection, LED Display, Overheat Protection, Pressure Release Valve See more
Power Source: Liquid Propane
Special Features: Anti-Freezing Protection, Dry Combustion Protection, LED Display, Overheat Protection, Pressure Release Valve
Wattage: 46 watts
Voltage: 12 Volts (DC)
Flow Rate: 3.9 Gallons Per Minute
Maximum Temperature: 124 Degrees Fahrenheit
Heat Output: 65000 British Thermal Units
Efficiency: High Efficiency
Maximum Pressure: 150 Pound per Square Inch
Mount Type: Built-in
Is Electric: No
Color: Silver
Style Name: ExploreFlow Max
Brand Name: Ranein
Model Number: RA65SH
Manufacturer: Ranein
Included Components: Assembly pack x 1, External Shower x 1, Instruction manual x 1, Tankless water heater x 1, Wired gigital controller x 1
Capacity: 10 Gallons
Item Dimensions W x H: 15"W x 15"H
Item Depth: 14.5 inches
Material Type: Heat exchanger copper
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Jul 24
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Silver
Set name: RA65ZH
Hello. First time Rv owner going full time living for a few years. I know little about RVs and tankless h2o heaters. I did hours and hours of research and pulled the trigger on the Ranein Nova + 3rd gen. It arrived when expected, excellent packing & communication from the seller. 1996 travel supreme 5th wheel with an old suburban 6gal h20 tank heater that was leaking. I paid for the install as I was busy with other details. The old access was to large for the Ranien so a simple 2x4 frame was added in order for the new system to be mounted securely and then the old door from the last heater worked fine and mounted up to the new frame made. Very easy install for a mobile rv tech and he hollered when he turned the tap on to see how long it took to get warm, He was shocked, stunned and was thoroughly impressed. I added the Wasserman water pump with accumulator tank recommended and a nice adjustable pressure regulator for the incoming water. Got it all dialed in and took a 40 minute shower, same temp the entire time and no changes in pressure or volume. Its functioned perfectly for the past 9 days. A nice surprise was that it came with the outdoor fittings installed and the outdoor shower kit as well, which was not assured from the Amazon listing and some reviews made no mention of it at all. But mine came as pictured from Ranein. The unit is small, compact, ready with hot water immediately and will provide the same temp water for as long as you want or have water. I cant wait to put a makeshift tub outside and fill it with hot water on a cold clear night and watch the night sky. Seems as if it doesnt use much propane at all. Time will tell and the whole thing is so flawless that I havent once had to read the manual and figure out the control panel and all its functions yet. Allowing me to focus on more immediate needs. Personally, I dont believe I will ever own a hot water heater system with a tank again, home or RV. It is just endless exact hot water, no rush, no water getting cold and for just myself...it is bliss. 5 stars
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Reviewed in the United States on December 20, 2025 by D ROUSH
Color: Silver
Set name: RA65EH
My old suburban 12 gallon tank was leaking from the combustion chamber. So I researched as best I could over a week and settled on the Rainen on demand hot water heater. It’s now been installed for about two months of continuous use. It’s doing great. I spent November and December in Ohio where it got down into the teens for several nights. I do use a heated hose in those cold temps but it still had no trouble making 124 degrees. Even at near freezing with the hose heater off. It showed 35 degree inlet and 124 outlet. I was careful to order the 18x18 door combo which saved me $79 and had to frame the opening down to fit tank itself. It very easy, I just placed a 2x4 on edge along the top and left sides. I used Kreg pocket holes to hold them in place. Installed heater,and it fits perfectly, and then installed the door kit. Made all of the connections inside and had hot water in 30 seconds. I absolutely love it but I do have a few “complaints”. I would like a handing option on the door so that it can be made to open toward the front of the trailer. The T&P valve leaks above 60 psi and I had read this before buying it. With a regulator inline it doesn’t leak but it also can’t make enough volume to run two devices. Without the regulator it does fine. I need to find a high volume regulator. The ramp up for hot water is longer than a conventional tank. I knew this going in but when I dry camp it will be an issue for water loss. I think I will rectify this with a reclamation system. So the pros far outweigh the cons and it was half the money of the suburban unit I had that only lasted 5 years.
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Reviewed in the United States on January 3, 2025 by Larry P
Color: Silver
Set name: RA65LH
This unit is wonderful. My grandson installed it yesterday when my hot water heater went out and it was a smooth install and it works wonderfully
Reviewed in the United States on May 4, 2026 by Deborah K Pottle
Water heater was easy to install seems to be working good and it does get hot quickly hopefully it will last for a long while only been using it for about a week so far.
Reviewed in the United States on May 14, 2026 by Richard Scurlock
Color: Silver
Set name: RA65LH
Wow. Game changer. It was easy to install in my 2019 Jayco Eagle. I watched a YouTube video on it. I pulled the old one out. Since I had a 15x18 inch space, I grabbed a 2x4 and filled in the space. Slid the new one in. The gas was standard. I experimented with the wires. There's only two needed to connect it to the RV itself, and two for the control panel. Now we have continuous hot water. I no longer run out of water washing dishes or taking a shower. I have a combo washer dryer and my clothes come out cleaner. One of the best adds I've done to my travel trailer.
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Reviewed in the United States on May 5, 2026 by Eric Wahner
Color: Silver
Set name: RA65LH
Solid, very capable unit. Easy to install, easy to operate. Bang for your buck!
Reviewed in the United States on April 30, 2026 by Justin Wood
Color: Silver
Set name: RA65EH
It fit into the existing space and was easy to install
Reviewed in the United States on May 21, 2026 by Ripbc
In our Motorhome we have a Tub/shower combo. When we bought the motorhome the tub was a great idea for the kids, but the motorhome came with a 6 gallon water heater and was NEVER big enough and showers left a lot to be desired (start/stop) and recovery time was slow. I installed and set up this Ranein tankless water heater and the kids LOVE their baths, and Mommy & Daddy love the showers. No question this is the best upgrade ever!!! ** I disconnected and removed the existing water heater then installed the new Ranein tankless water heater, it fit PERFECT in the opening, I connected the propane, I added about 5" of pipe and fittings to the cold water supply and out from the supply out to the distribution manifold, I then hooked up the 12v power and routed the wire from the included Temperature controller that I installed in the bathroom, I routed the wire from the temp controller wire down to the water heater and hooked it up. I checked all my water connections and wire connections and turned the water pump on and bled all the H & C water lines THEN powered up the water heater. It was simple!!! I turned on the HOT water alone in the bathroom (this called for water through the water heater) I heard the water heater start up, I turned the temperature controller up to the MAXIMUM temperature we wanted delivered out of the faucets so NOBODY would get burnt 🔥 just by turning only hot water on in the bath, shower, kitchen sink or the outside shower 👏🏼👏🏼 . UNDERSTANDABLY the water is not hot coming from the water heater AT FIRST, until the water heater senses the call for hot water and starts heating the water and it travels through the water line to the fixture, SAME way it was with a tanked WH, except as long as you have Power to the water pump, Water and Propane you ALWAYS have hot water 😁🥰. **** I think the problem several people run into is they set the delivery temperature 🌡️ mixed with cold water so the tankless water heater starts and stops making your bath or shower very uncomfortable. Set the delivery HOT WATER temp to the MAXIMUM you want coming out THEN mix the cold water in. In the picture you can see the color of the outside door (the door comes white and I haven't had it painted to match the motorhome yet). My Girls and my wife ask "why wouldn't they have this water heater installed in the motorhome from the factory ?" We have used this water heater and have had NO problems or any problem with temperature since it was new 👍🏼
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Reviewed in the United States on November 1, 2024 Reviewed in the United States on November 1, 2024 by Jeff