Rinnai RE180eN Non-Condensing Natural Gas Tankless Water Heater, Up to 6.9 GPM, Outdoor Installation, 180,000 BTU

With the proper installation, this unit works like a powerhouse, the appearance is sleek and pleasing, competitively priced, the controller is at the front of the unit. It's heat transfer and capacity is super efficient and you have the option for external pump and timer control. It's simply the best.

Bought and installed this a week ago. Had no problems with it but I highly recommend that if you are going to purchase, it’s not a plug and play even rinnai to rinnai. Set your gas line in first and then replumb the water lines. It makes it a lot easier.

Awesome replacement package for my old R85! Has recirc pump that has the ability to deliver quick hot water.

This unit is very good. It was easy to install and came right up when power was turned on. The unit was preset to 120 degrees! I used 21” non condensing exhaust/vent kit and Matsui isolation valves. So far very happy. Customer support was very professional, friendly and knowledgeable. Thank you Rinnai!

We had this professionally installed a few months ago, and so far it just works. The single thing I don't like about it is shared with all currently available on demand heaters made today; they require electricity to run. The previous Bosch heater we had ran on a pilot light, and didn't require any electricity to run. What this means is if we lose power (very likely where we live), you have to hook up some sort of alternate power source to get hot water. We have both a gasoline & battery generator, so this isn't as onerous as it might be, but still annoys me. The only heaters that are available that'll run w/o electricity are those designed for camping where you start them manually. I want to take a star off for this, but since it's ubiquitous there doesn't seem to be a reason.