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

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.

Solid, very capable unit. Easy to install, easy to operate. Bang for your buck!

ordered it, went to install it, controller did not work, talked to them, hooked everything up, sent them video of it all wired up and nothing working, they had me do a voltage test on controller, it failed, 3 days later they said they would send me one, 3 days after that no email, no tracking # , no response, camper is still tore apart waiting to hear from them. if I don't hear anything in 3 more days will take it back out and return it and will not buy anything from them.

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.

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

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.

It fit into the existing space and was easy to install

recomended by our RV guy, we live in ours...so it gets used, and it seems to work well, lots of hot water now, and quite efficient...and our RV guy says he has installed quite a few with only one needing warranty...so far so good, and the panel is great and easy and readable..

I installed one in our trailer we live in full time and it works amazing with the adjustable temps I don’t even have to touch the cold water I can adjust it so the temp is perfect when I shower. It is really good on fuel efficiency too barely go through any propane a must have for any trailer living in full time or not.

This unit came with controller, Door and evrything else that i needed to make it work,

It is very easy to install, Was my first time and had to make two trip to canadian tire for plumbing supplies but worked out very well. Did fit perfectly into the hole i had from original tank.

Tested, worked great, took than 30 sec to get hot on the tap. 50 degree temp is more than hot enough.

I had this unit for 1 year now. I am very pleased with the product, I highly recommend. It performs very well and it is very, very efficient on gas compared with a regular RV water heater. I had a problem in the fall and the support team was outstanding. They are responding very quickly. I would buy it again without hesitation. The only fix I have done was to glue the exhaust protector seal because I felt it had the potential of falling when opening and closing the door.

Been full time RV living for 6 years. Had a 6 gallon atwood that worked well for what it was.

Only had this tankless unit a couple weeks, but it's been great! No issues for showering. Only complaint is that you have to leave the water running for a a while to get it it fully up to temp. Not as good for hand washing because of this, as you use up more water.

I would say, if you're off grid camping and have limited water supply, this may not be a great option. But if you're hooked up to water or full time living like we are, this is a fantastic option!

Also, be aware of the dimensions. It is narrower horizontal than most 6 gallon heaters. I filled the space with some ripped down 2x4, culking and some fiberglass panel.