Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY

We installed the Rheem 240V Heating Chamber RTEX-13 Tankless Water Heater, and it has completely transformed our buildings hot water system!Pros:Endless Hot Water: This unit provides a continuous supply of hot water, which is perfect for our busy buildings. No more waiting for a tank to refill!Energy Efficient: The on-demand heating means we only use energy when we need hot water, resulting in noticeable savings on our utility bills.Compact Design: Its compact size allows for easy installation in tight spaces, which is a major plus in our buildings.User-Friendly Controls: The digital temperature display and adjustable settings make it easy to customize the water temperature to everyone's liking.Reliable Performance: We’ve had no issues with temperature fluctuations, and it maintains a consistent flow even during peak usage times.Overall, we highly recommend the Rheem RTEX-13 for anyone looking to upgrade to a tankless water heater. It’s efficient, reliable, and has made a significant difference in our daily routine!

Installed this--my first--tankless water heater 3 years ago. Just my wife and I in a 2 bath home in south Florida (warmer entering water temp than most of US). Been very pleased. Endless hot water with steady temps and no issues with competing hot water demands such as dishwasher, sinks, etc. I've been surprisingly satisfied.A few weeks ago we started noticing a drop in water pressure and some temperature fluctuations. Honestly, though I am reasonably handy and experienced, I had no idea I should be cleaning the heater annually. Long story short - cleaned the unit and everything is back to normal.More detail for those who, like me, had the water heater installed without purge/diverter valves. I had only copper piping and no way to flush the heater. Read about some people who used a plumbing circuit involving a washing machine, but couldn't see that working for me. So, I went to Home Depot and spent about $170 on a purge valve kit, copper fittings, pipe, solder, flux, etc., ready to re-plumb my water heater and install purge valves. As I removed the compression fittings attaching the copper pipe to the heater I thought, "why don't I just attach hoses directly to the unit and skip all the plumbing?" That's what I did and it worked beautifully. In my case, I purchased 10' of clear plastic tubing, cut it in half and attached to the heater with band clamps. Used a 1/4hp pump in a 5 gallon bucket and flushed the tank for around 60 minutes. I changed the direction of the flow at about 30 minutes, not sure whether or not it helped but seemed a good idea.Returned almost everything I bought for the project, went home and took a nice long hot shower.

I bought the 13 KV model, it works great. Replaced a 52 gallon regular water heater and this tankless one works as good or better than the old one. It is small, about the size of a shoe box. I have a well, and water temp this time of year from the well is very cold but this unit does fine. Also with a well the water pressure varies a lot and is kind of low, 30 to 50 PSI, so you can only use one hot water source at a time. I have a big house, kitchen sink is about 70 feet from the water heater but water is very hot at the sink, it just takes awhile to get there. I had to make several adjustments to temp, as water was too hot, right now temp is set to 129, still a little too hot at times but works for doing dishes and pans in kitchen sink.The smaller units like mine, 13 KV, have 1/2 inch fine threaded inlet and outlet, but it comes with a 1/2 inch fine to coarse adapter. Also most hot water fittings and pipes are 3/4 inch, so you need to get an adapter if you have 3/4 inch pipes.Price was great too, $30 less than at HD for same unit.Unit requires number 6/2 wire, which is not cheap, plus a 60 amp breaker.Very happy with this tankless water heater, should have changed sooner.

Reem is definitely a residential/ homeowner brand. Definitely not professional grade. So far it's working well... I've only used it a few times on the outside shower I installed. Installing it was very easy...just make sure you get 6/2 wire and a 60 Amp dual pole breaker. Plumbing parts are easy to hook up. Also before you power it up... run the water first so there are no airlocks.. once water is flowing steady...you can turn the power on.