This product needs a large pipe for intake and exhaust. Will not fit for everyone. Installation can cost as much as the cost of the unit and more. I had no choice but to return it. So glad to have bought from Wayfair as they made the return very easy. Thank you Wayfair

It is quiet when running and works as expected. It has been quietly heating my water for 8 months and I'm glad I chose this one.

Endless hot water! It's been installed for about a year. Wanted to put one in for a long time and finally pulled the trigger. The only thing I would change is the size of it as far as output(BTU). Here in Missouri the ground water temperature gets pretty low in the winter which affects the amount of GPM. If 2 or more things are demanding hot water, it struggles to keep up because of the temperature rise required . Other than that I have no complaints. It's not really a complaint but, a better and/or more flexible way to change the temperature without buying the expensive controller. I think that should be standard on all models.

This unit 6 months. Replaced a similar Rinnai tankless heater that was 15 years old.

Install was pretty straightforward. Good instructions. Got rid of electric water heater. I have a full basement and was able to vent through the exterior wall as needed. Skill level 3 or 4 to install. Only disadvantage is a long time to get hot water flowing trade is tank uses more energy water flows faster tankless less energy but more water usage waiting for hot water to reach faucets.