Best RV Water Heaters of 2025

"I had to cut and replace cold and hot water fittings, but otherwise, it was a great fit! It worked well the first time without any issues. The whole process took about 4 hours for me to remove and replace."

"I replaced our hot water heater using this kit, and it was a quality product. Once installed, the water heated up quickly, and we were very pleased with the performance."

"After installing a new unit to replace the old one, I found the installation straightforward. However, I had some trouble with the ignitor initially, but a quick adjustment fixed the issue, and now it works great!"

"I found it to be very easy to install. The hot and cold connections are in different spots, so I had to adjust some of my PEX pipes. I also had to purchase a door adapter, which was an extra cost. However, after 18 months of use, I noticed that the welds are starting to leak, which is concerning since water damage in a camper can be severe. I definitely recommend getting the warranty with this unit."

"So far, my experience has been great! I’ve been camping for two weeks, and this heater has performed without any issues. Just a heads up, you’ll need to buy the adapter faceplate elsewhere for the best fit."

"I had an older Dometic water heater that leaked after 16 years, so I replaced it with this unit. The installation instructions were excellent, and everything fit well without needing modifications. My only slight issue was with one of the fittings having rough threads, making it a bit tricky to get a tight, leak-free connection. I should have used a thread chaser to clean them up."

"As a full-time RVer, I've found this water heater to be a fantastic replacement for my old Dometic 12-gallon model. The customer support has been amazing; they respond to my questions almost immediately. While it takes a few seconds to get hot water at the tap, I can still enjoy endless showers without running out of hot water. The installation was straightforward, using the previous wiring, though I had to order the door separately. I highly recommend this affordable option!"

"After replacing my old 10-gallon heater with this Rainen on-demand model, I've been thrilled with the results. The installation was mostly simple, requiring just a few connections. I did have a minor issue with the controller, but the seller was very quick to assist. Now, I enjoy unlimited hot water, similar to what I have at home. It's been a great addition to my RV!"

"I installed this 65,000 BTU RV Tankless Water Heater a few weeks ago, and it has truly surpassed my expectations. The on-demand feature is revolutionary, providing hot water instantly without the long waits of traditional systems. Plus, it performs excellently in high-altitude conditions, making it perfect for my trips to the mountains. The user-friendly controller allows for easy temperature adjustments, and it fits seamlessly with my RV's exterior. Overall, I think this water heater is essential for any RV owner!"

“I replaced my 10-gallon Atwood water heater, and I found the companion door fit perfectly. I did have to modify my PEX water lines since this tankless water heater is smaller and lighter. The LP line connected easily, and after wiring it up according to the concise instructions, it fired up on the first attempt. Now, I enjoy continuous hot water!”

“My installation went smoothly, and customer service was quick to resolve a minor issue I faced. I’m not used to the tankless feature, but it’s been a pleasant change. I can take 15+ minute showers without running out of hot water! The 30lb tank seems efficient so far, and overall, I feel it was a good price for what I received.”

“I installed this water heater in my 2002 Winnebago, replacing the old Atwood 6-gallon unit. The installation was manageable, though not as straightforward as expected. Upon powering it up, I got the results I anticipated, and after a few minutes, it produced hot water. I’m still monitoring its performance, but so far, I appreciate the steady temperature during showers.”

"I installed this heater in about 1 hour. It heats water quickly—about 5-9 seconds from turning on the hot side. Just be cautious mixing cold water, as it can turn off the flame and result in a cold shower. I find it to be the best investment so far!"

"I replaced my 6-gallon water heater in the RV with this tankless model, and it was the best decision! The installation was straightforward, but don’t forget to order the door/cover separately, as it doesn’t come with the unit."

"I purchased this unit to replace a 10-gallon RV hot water heater. It was simple to install and provides an endless supply of hot water! The only minor issue was the size; I had to fabricate a wall around it, but it took less than two hours to complete. I highly recommend it!"

"I wish I had bought one of these a long time ago. Very straightforward and easy to install. This unit is a great addition to my RV with fast, consistent, never-ending hot water. I hope it's more propane-efficient than my old 6-gallon water heater."

"Using this for my off-grid cabin, I had to figure out the right parts for my setup. After some trips to the hardware store, it works perfectly, and the water is HOT! I recommend using a 100 psi pressure relief valve instead of the standard one."

"I had some ups and downs with this product. The customer service is fantastic; I spoke with someone in the US who was very helpful. Unfortunately, my unit needed new parts within a year, which is concerning. However, I appreciate their support and the warranty."

"As a full-time RV'er, I installed this tankless water heater with ease. After much research, I found this unit to be the best choice. The installation was straightforward, and I love that it provides endless hot water. The gas consumption is much more efficient than my previous unit, which is a game changer. I also saved money on the replacement cost, which is fantastic!"

"I had an older RV and found this unit easy to install. It functions great with plenty of hot water. Just a tip: don't forget to order a door to fit this unit properly!"

"I purchased this to replace my frozen tank unit. The control panel is user-friendly, and I appreciate the temperature adjustment feature. However, I did encounter some workmanship issues during installation. Winterizing is a bit tricky since it requires draining the whole water system, but overall, this heater has excellent features and works well!"

"I had to build down our opening with insulating foam board and shorten our gas line. The prep was a pain, but once ready, the water heater was as easy as turning it on. We finally had hot water throughout the trailer after fixing the water pressure issue."

"After reviewing several options, I decided to purchase this water heater. Unfortunately, I’ve been dealing with a nightmare. The manual was very short, and my old heater used a different power supply. I tried multiple transformers and couldn’t get it to turn on. Now I have to deal with a refund process and cold showers."

"Upgrading our RV heater was the best decision! We took it on a 7-day trip, and it performed perfectly with instant hot water and great pressure. The installation was straightforward, and we had no wait for hot water!"

"I installed this water heater in my RV and so far, it's been working flawlessly. I love not having to worry about propane tank levels when parked long term. It wasn't a direct replacement, but I managed to use the old cover to seal the larger hole. I also wired it to an old garbage disposal receptacle, which has a switch to control power. Very happy with this purchase!"

"My previous water heater was showing signs of rust, so I knew it was time for a replacement. This one fit perfectly and was easy to wire up. I particularly liked that I could install a switch inside the camper for the AC heating option, unlike the old one. The propane connection was a breeze, just remember it takes a bit for the gas to purge."

"I've had some issues with the units I purchased. The first one arrived without instructions and was damaged. The second unit had all the instructions but the anode rod was stuck. I reached out to the seller, who was very responsive. They informed me that this is a known issue, and I eventually managed to remove it using a breaker bar. Overall, I appreciate the customer service."

"I found this water heater to be a very easy project. I replaced a worn-out unit in my friend's RV, and it was a quick swap. The features it offers are a definite upgrade, especially the remote panel which adds great functionality."

"I really enjoy my tankless water heater. I believe these are the best option available. The installation was straightforward, though I had to cut a half-inch hole for it to fit. Overall, I highly recommend a tankless water heater."

"The OEVANT RV Tankless Water Heater arrived properly packaged and was delivered safely in just three days. It’s a solid choice for campers seeking instant hot water without the hassle of a tank system. With a powerful 55,000 BTU output, it heats water quickly, making it perfect for showers and dishwashing on the go. The intelligent thermostat maintains temperature effectively, providing consistent warmth without sudden cold spikes. Its compact design fits comfortably in most RVs and the remote controller enhances ease of use. Overall, this water heater is an efficient and practical investment for any RV enthusiast."