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: $1,290

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:  
 19 reviews
by Jeff H on RV-550
Excellent Service And Delivery

We are very impressed with the communication and speed of delivery for our new water heater. Can easily give PrecisionTemp our highest unqualified recommendation.

by Nate G. on RV-550
Precision rv550 Water Heater

Purchased a rv550 water heater to replace my rv 500. Everyone I spoke with at preceision were very helpful and professional.
Very easy install. Plumbing and electrical and gas connections very similar to the rv 500, and size is virtually the same.
Couldnt find an rv dealer willing to do work the for a couple of months out, so did myself.. Seems to be working great.

Thank you so much for the review!! We are always here for you!

RV-550 EC

Wow what a buy. We are full timers and this was the first time we were able to shower non stop. Endless hot water for sure. Our propane useage is down at least 50%. Another bonus feature is you never have to flush out the system. It keeps the system clean all by it self. The staff at precision temp answered all of my question and were very helpful in the installation process. This winter we have no worries about the tank freezing. Precision temp has that all figured out. We recommend this product to everyone.
We will write another review once we have had it for a year.
Phil and Wendy Portland Oregon.

by Joe S on RV-550
Wife Saver

I installed the heater myself in less than 4 hours with no help and that included removing the original heater in our RV. It worked the first time and it has been perfect for almost 3 years now. Never have to worry about who takes a long shower. The kids love it and so does my wife!

Thank you for the review. Good job on the install! Glad to hear it is a Wife Saver!!

by Lamar Kimmel on RV-550
Very easy to replace

I replaced an Atwood 5001CW that had multiple issues. The RV-550 EC that came was labeled very good. My old unit had three wires and I had to track down and eliminate the extra wire. The RV-550 EC had a larger body than the old unit, but the face was the same size. I had to enlarge the opening in my 5th wheel. This wasn't an issue as no frame members had to be cut. The unit came with everything needed to install, including the shark bite connectors. Fastened to my coach, made the hookups, and nice HOT water. This unit was easy to install. I was extremely happy with the customer service that followed my purchase. Kay Anderson emailed me the next day to offer any help that I may need. In today's world, it was wonderful to have a company that cares. I will definitely buy from this company in the future, and recommend them to anyone that asks.

by Todd Rush on RV-550
Customer Service

I purchased a RV-550 EC black for my 5th wheel camper. Had some issuues with it working. Ray went above and beyond what I expected to get my problem resolved. Unit works great. I will buy from here again. Best customer service ever.

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.

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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