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Rinnai

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Int CTWH 180k Btu 10gpm max w/Valve
R

Model: RU180iN

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Int CTWH 180k Btu 10gpm max w/Valve

4.4 from 384 ratings

Super High Efficiency Plus 10 GPM 180,000 BTU Natural Gas Exterior Tankless Water Heater

  • Professional installation required; call 84-GO-Rinnai for assistance.
  • ENERGY STAR® Qualified with an Energy Factor of 0.95 / Uniform Energy Factor of 0.93
  • Equipped with Rinnai Circ-Logic™ - Pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation
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CUSTOMER REVIEWS
5 Stars
59%
4 Stars
29%
3 Stars
6%
2 Stars
2%
1 Stars
4%

4.4 from 384 ratings

"Rinnai is a Great Product"

Honey Jul 21, 2022

5.0

We love the space it saves, the endless hot water, and the quality of the unit. The only downside is getting used to the length of time it takes for the water to get hot.

"sales"

Anonymous Jul 21, 2022

5.0

"Works great for hot water"

DG Jul 20, 2022

4.0

Very easy to operate. Like that we don’t need a large tank of water requiring constant heating. Dislike the wait time to get hot water to the furthest taps , but it’s not much longer than the old tank wait time.

"Customer review"

jimmyd Jul 20, 2022

4.0

We have had the Rinnnai water heater for about 10 months. It has performed satisfactorily,sofar .Having unlimited hot water on demand is wonderful ,especially when the grand children are visiting. The only downside at this point is the waste of water while its heating up. In communities with a limited water supply ,that would be a deal breaker.

"Customer review"

Anonymous Jul 20, 2022

5.0

"Very good hot water heater,dependable"

Seaweed Mar 16, 2022

5.0

It has been very reliable. Easy to turn off and on while we are away.

"Satisfied Customer"

Hot Showers! Mar 8, 2022

5.0

Efficient with plenty of hot water. Exceeds expectations.

"It works"

asdf Mar 8, 2022

4.0

asdf

"First time Rinnai instant hot water maker experience"

Rinnai review Mar 2, 2022

0.0

Loud. Ours is installed in basement. Would not want this unit installed on a first or second floor if avoidable. Not sure why it is so loud but on the second floor I can hear it from our basement.

"Rinnai Tankless Hot Water Heater"

CM in Indiana Feb 13, 2022

4.0

This device is great. We replaced a leaking 80 gallon tank that came with the house. With a family of 5, this is a great addition - no worrying about running out of hot water.

"You waste water while the water warms up. "

Mick Feb 8, 2022

3.0

1 year

"Customer "

MH Jan 15, 2022

5.0

Less than a year

"Rinnai Instant Water system features "

Msafiri Jan 13, 2022

4.0

I like the capacity of the system as it is able to handle water heating for all my needs ( two showers, dishwasher, laundry and faucets running at the same time. I dislike the humming sound everyone the faucet or shower are running. Can be quite loud especially if the system is near a sleeping area. It also takes a bit of time to get hot water to the furthest part of the house from the system and so have to let the water run for a half a minute to one minute.

"Happy with Purchase"

Anonymous Jan 11, 2022

5.0

Installed 6 months ago, working well

"Customers need to know, that while water heater works fine, the time to get hot water is considerably longer than from a conventional tank heater. It takes at least one minute running water to get it hot. A lot of water waste."

Mrs. Suddick Jan 10, 2022

4.0

Unit does not take too much space, works quietly. I was misguided by other people reviews that hot water supply is immediate. It is not. We may save a bit on gas cost, but paying more for water.

"Super high efficiency on demand"

E&R Jan 2, 2022

5.0

Love it!

"great water heater"

Goldwing rider Dec 24, 2021

5.0

It was easy to install and convert from Nat, gas to lp gas. I had it now a couple months and it works great.

"Great efficiency and a quality product. "

Jarhead8532 Dec 10, 2021

4.0

Our unit is propane, the highest efficiency model for gas. We have 2 bathrooms and unit meets our expectations.

"Customer review"

Anonymous Nov 30, 2021

5.0

"Works as advertised. Gas model should be paired with a Hugo battery backup system to be invulnerable to power outages. First run of the day at farthest faucet takes a full 60 seconds (undesirable in water starved communities) to reach temperature without a recirculate pump but less susceptible to mechanical issues down the road. Delay is not so noticeable once water is being actively used elsewhere. I would not change my selection but was shocked at the delay the first time I experienced it. Veteran water savers know how to compensate by collecting the cold water for a free toilet flush later on! Hugo is a must. I experienced 2 power outages in the first month of usage without a problem. Losing electricity becomes a big problem the more systems it affects. . . Don’t let it affect your water flow (even in a gas powered tankless water heater). I also can’t say enough good things about Dave in technical support who spoke with me for an hour answering my many questions and then emailed me the tankless water heater manual and tech bulletin on the Hugo battery backup system"

Happy in California Nov 26, 2021

4.0

2 months

1