RV-550 EC Propane Tankless Water Heater

The RV-550 EC is a four-season, tankless water heater, installing and fluing just like a tank type water heater, through the sidewall.
  • Endless hot water. Never run out.
  • Specifically for sidewall installations in RVs, Buses, Tiny Houses, Barns, and more
  • Standard cold weather protection
  • Dimensions 13.5”wide X 14.25” high X 13.5” deep and weighs only 32 pounds
  • Precise electronic VariFlame temperature control system
  • No pilot light and very high efficiency
  • Fully certified to ANSI Z21.10.3/CSA 4.3 standards
  • High output. 55,000 BTU max input (88 degrees F temperature rise/gal/minute)
  • Door included (Choice white, black, or aluminum)
  • Install video below

Price: $1,265

RV-550 EC with White, aluminum door

RV-550 EC with Black, aluminum door

RV-550 EC with UNPAINTED, aluminum door (great for airstream)

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Average rating:  
 13 reviews
by @AvionTheRoadAgain on RV-550
I’m in hot water now!

When the original 6 gal water heater in our 1976’ Avion Travelcader went out, my husband bought this unit for me as a Valentine’s Day. I know that doesn’t SOUND romantic, but as someone who takes endless showers, and who was forced into taking 5 minute, lukewarm Navy showers on our camping trips, this gift was the HEIGHT of chivalry.

Installation was pretty straight forward, all things considered, and it works like a dream. I was able to fill our small vintage tub with hot water for the first time in the old girl’s 46 years of life. Our house doesn’t even have hot water like this. I will never own another camper without a Precision Temp water heater.

by Gary Raymond on RV-550
Great for cold weather

I have had this unit for about a year now, it works wonderful. I am in a very cold weather climate with cold ground water. This unit saw and worked great in -34° air temp with a small dyi piece of foil backed duct insulation. With water temps of 42°. Prior to buying this unit I talked with customer support and they were confident that this unit would handle the cold and it did, well worth every dollar couldnt be happier the endless supply of hot water is great after working out in the cold all day.

by Sean Rafferty on RV-550
Easy as pie to replace

The original water heater in our RV started leaking, it was a 2013. I ordered a replacement from here. Easiest thing to replace. The hardest part about it was removing the old mastic tape.

by Jim shook on RV-550
Install 2015 winnebago Adventurer D32

Took some work ...but i got it in . Fired up and works fine
so far.

by Brian on RV-550
A Game Changer for the RV Experience

I purchased this product directly from the manufacturer via the installation/service company which was RV Time in Sacramento, CA. The unit was installed in my 2021 Forest River Wildwood X-Lite. The water heater I replaced was basically brand new and had only be used 6 times. The water heater I replaced was working fine, but insufficient to enjoy a shower.

The RV-550 price was the same as on Amazon, so purchase the unit where you are most comfortable as either option seems fine. The unit has a similar depth to the 6 gallon Suburban DSI water heater that I replaced, but the external width is slightly larger. This required my installer to cut the exterior hole slightly larger and to do some framing around the installation hole (inside of course).

My installer - RV Time in Sacramento - did an excellent job. This was the first time they installed this brand. They had to call PrecisionTemp with questions given this was their first exposure to PrecisionTemp and they said the quality of the support they received was better than all other manufacturers they work with. They went onto say that PrecisionTemp seemed to take real pride in their product. I suspect this will not be the last RV-550 that RV Time installs. RV Time (Matthew) did a superb job on the install at a fair price.

The RV-550 unit worked flawlessly on our first trip that we just returned from - 4 Nights in Coloma. I highly recommend this product - worth every penny.

by Frank Newman on RV-550
2 Years and Still Goin Strong

We installed this water heater in August 2018 and We have been living in our RV full time.
It’s absolutely the best thing you can add to your RV, Travel Trailer, Tiny house or Cabin. They also make a model for your boat.
We love having endless hot water when showering.
When we had the standard 6 gallon water heater that came In our RV we couldn’t even finish a shower before the water would start to get cold.
Thanks PercisionTemp !

by Rick Gavigan on RV-550
Good to be in hot water.

Living in a thirty year old coach, has its own unique problems. My original 10 gallon water heater developed a pinhole in the bottom of the tank, I decided to try another tankless system ( l had purchased one from Japan 12 or so years ago for my mountain home, but wasn't impressed. My go to RV guy, for repairs that I have no clue or desire to mess with, highly recommended the 550-EC. I took a chance, Although there where installation challenges the unit and door fit very nicely into the exiting compartment. The frustrations started when I opened the spigot and was rewarded with luke warm water. Staying in the Arizona desert with temperatures hovering around 85 degrees would allow warm water to provide a comfortable shower for myself, but not the little woman. Having replaced the propane regulator 3 months ago I felt there was a problem with the heater. I called Pression Temp tech support, explained the issue with the unit steeling propane from the stove top when it ignites, the answer given wasn't what I wanted. Robbing gas from the stove indicates low pressure. Another regulator might be needed. Ive had issues with oil in the propane system, known to me only in the past few month's. Ethyl Mercaptan used to create a scent in propane can build up in propain tanks and the lower laying piping throughout the entire system and can reak havoc on the regulator attacking the o-rings. This was the problem, so a new regulator and cleaning the pipes and tank, fresh propane and I was ready to try again. Jesus H. the water was hot, with very little delay, It is pleasing to have and works as advertised.

All is right in the water heating world.


Thank you so much for your review and also for being a great customer. Please remember we are always here to assist you should the need arise.

by Carol Marie on RV-550
Happy Campers!

We recently purchased a used (but like brand new) 2017 Montana High Country. The original owner installed a RV-550 Water heater. The shower was either ice cold or scalding hot and no in between. I called Precision Temp and Gary patiently walked me through a checklist to trouble shoot our problem. He knew immediately that it had to be a water-flow issue. It turned out to be exactly that. It was the flow restriction piece that was installed at the factory. The simple remedy was to remove the restrictor valve and it now works perfectly. It was never an issue with the RV-550, but rather with the trailer itself.

....All that to say that the Precision Temp was gracious and willing to spend the time with me to remedy the issue. I greatly appreciate Gary's patience and knowledge. We were not the original purchaser of the tankless water heater, but they were so willing to correct the issue!

by Sherry Newman on RV-550
Full Time RV Living is a lot better Now !

My Hubby just installed the new RV-550 EC tankless water heater, We love this so much already and we will probably be purchasing another for our tiny house that we will be building soon !

Nothing like a 15 minute shower after a long day or even just to wake up. Try that with a regular RV hot water heater and you will be freezing!

5 Stars isn't enough !

by Frank Newman ~ The Woodzman on RV-550
Best upgrade for the RV ever !!

I own a 2018 Forest River Wolf Pup camper the my Wife & I live in full time and it had a 6 gallon hot water heater in it, I was tired of turning the shower head on and off to conserve hot water while taking my shower, honestly this tankless is the best investment you can make for your camper!

Installing the tankless is simple and common sense 2 wires for 12 volt positive and negative, That's it for that, then connect the hot and cold lines and finally the propane line. 1 1/2 hours later I was taken an uninterrupted hot shower!

Yes I recommend this, oh and don't forget to order the buytal tape and door for your full installation..

With the standard 6 gallon water heater, my Wife could take her shower but it had to be taken fast or you would run out of hot water, Then I had to wait for the water to heat up again for my chance.

The Precision Temp RV=550 EC is the greatest thing ever !


Thanks Precision Temp !

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  Hot Water in Any Season

The PrecisionTemp RV-550 EC tankless, water heater utilizes our patented VariFlame Control technology to deliver an endless flow of hot water for the ultimate shower.

Whether in the dead of winter in the North Dakota oil fields or on sunny days in southern Florida, hot water is there for your enjoyment.

  The Proof is in the POWER

With 55,000 BTUs—the highest hot water output in the industry—and built-in freeze protection, the RV-550 EC delivers on-demand, continuous hot water.

The heater operates only when the hot water outlet is turned on. The VariFlame control system then keeps the water temperature constant, regardless of the flow rate or incoming water temperature.

  More Hot Water. Less Propane.

With higher efficiency and 55,000 BTUs, the RV-550 EC produces more hot water than traditional water heaters.

Without a tank to keep hot, many people report that they use up to 50% less propane. Owners love the lower operating costs and fewer fill-ups.

Type:Tankless propane-fired water heater with full gas modulation. Power-vented sidewall penetration and cold weather protection.
Dimensions:13.5″ wide x 13.5″ deep x 14.25″ high
Weight:32 pounds
Capacity:55,000 BTUs max input (88°F temperature rise / gal / minute)
16,000 BTUs min input (26°F temperature rise / gal / minute)
Venting:Power-vented through front access door.
Construction:Galvanized case with perforated mounting flanges for original equipment or aftermarket sidewall penetration.
Access door is aluminum.
Head exchanger: Solid copper. Gas train: Stainless steel.
Water Temperature:Adjustable
Controls:Gas modulation valve assembly initiates spark ignition and varies gas input based on water flow rate, controlling water outlet temperature.
Safety Features:Pilotless ignition, completely dormant until water flow is initiated.
ECO high temperature limit switch.
Instant flame-proofing by flame rectification.
Pressure relief valve.
Certified to ANSI Z21.10.3 / CSA 4.3 Standards
Due to continuous product improvement, PrecisionTemp reserves the right to change specifications at any time.

What makes the RV-550 special?

Continuous, endless, no-wait hot water for as long as you want. You can shower for an hour! Or longer…

How does the RV-550 provide continuous hot water?

The RV-550 has no tank. The water is heated as it flows through the copper tubing.

How do I get the RV-550 to make hot water?

Simply turn on a hot water faucet. A flow meter in the RV-550 is activated and the heater automatically comes on. When you turn off the faucet, the burner shuts down. There’s not even a pilot light — it uses a 12V current for the electronic ignition.

How long does it take to make hot water?

The RV-550 begins making hot water in seconds.

If endless hot water is such a good idea, why doesn’t everyone do it?

Most people don’t realize that they have an alternative to tank heaters. Once you use one, you will never want to use anything else!

Does the RV-550 install just like other water heaters?

Yes. The RV-550 installs and flues just like a tank heater. The RV-550 NSP installs just like a tank heater, but flues through the floor instead of the wall, using the included exhaust pipe. The water, gas and electrical hookups are the same type used on tank heaters.

Will the RV-550 fit into the same hole from my old water heater?

In almost all instances it will. The RV-550 is designed to replace most 10 gallon heaters without modifications. Cutout dimensions are 14.5″ high x 13.5″ wide x 13.5″ deep. Flanges are 17″ high x 17-5/8″ wide. To replace a six gallon heater, add 2.5” in height (up or down) to the sidewall cutout.

How long are the venting pipe(s) supplied?

The standard exhaust pipe is designed to go through a typical 1.5″ floor and elbow to the side, but we can provide the extension to go through a thicker floor, or you can get one at a local muffler shop. A PVC conduit can be used through your floor for combustion air.

Is the RV-550 as noisy as my current tank heater?

No. It is so quiet that the only way you know it is operating is that you have hot water!

When operating, does it create as hot an exhaust as my tank heater?

No. It is about 50% cooler. It will not scorch the side of your home.

Does the RV-550 use more propane than tank heaters?

To the contrary, the RV-550 is far more efficient. Plus, because there is no standby heat loss, you may find that you are using only half as much propane.

How do I winterize the RV-550?

Simply drain the RV-550 of water by blowing it out with air or running non-toxic antifreeze through the heater while winterizing the rest of your plumbing system. The RV-550 only requires about a pint of antifreeze.

Could you further describe the cold weather protection system on the RV-550 model?

The cold weather protection on the 550 series is standard. This feature will prevent freezing under most conditions. It has a built-in thermostat that turns the burner on in low burn when the heat exchanger temperature is about 38° F. At the same time, small 12 volt heaters protect the internal plumbing and control valve.

In order for this to function, the 12 VOLT AND GAS SUPPLY MUST REMAIN TURNED ON. This allows the burner to fire and electric elements to protect the system. Any freezing of the water heater or other plumbing components can cause severe damage that is not covered by warranty.

Unlike other tankless models, you don’t have to dump water on the ground or plumb it back into your water tank. This wastes water and propane. Our freeze protection uses very little propane and less than 2 amps of power.

Aren’t all “wetted” components in the heated living space of my home? Why do I need freeze protection?

The “wetted” components are technically inside, but the combustion air is drawn from the outside through an opening in the bottom of the unit. On the NSP model, the 2″ exhaust pipe also goes to the outside. This can allow freezing air to enter the unit.

Related Video:

How to install tankless PrecisionTemp water heater in RV Camper Travel Trailer RV-550 EC