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Old 05-07-2019, 10:33 PM   #1
Treeshark
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Default Tankless water heater recommendations? Propane

We are building a house and want to install a propane tankless water heater. What brand would you recommend? Plumber said we need about a 9.5 gpm
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Old 05-07-2019, 10:39 PM   #2
DallasCoon12
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We install Rinnai and Navien. Virtually problem free when installed and piped correctly.
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Old 05-07-2019, 10:40 PM   #3
Notaguide
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AO Smith and Rinnia both make good (9.4) units that can be found at most suppliers. Price is negligible from my experience. Are you running one centralized unit in attic or exterior wall vented?
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Old 05-07-2019, 10:40 PM   #4
DallasCoon12
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I really like the Rinnai units mounted in an exterior wall inside the factory recess box. No venting and no taking up space in the garage or closet.
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Old 05-07-2019, 10:43 PM   #5
Notaguide
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Quote:
Originally Posted by DallasCoon12 View Post
I really like the Rinnai units mounted in an exterior wall inside the factory recess box. No venting and no taking up space in the garage or closet.
Totally agree is why I asked OP. Seeing more homes being built with one overhead unit vs. using two exterior units to saving a little coin though.
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Old 05-07-2019, 10:44 PM   #6
DedDuk
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In have the rianniui or however it’s spelled. I went bigger than needed. I can literally run 3 showers and dishwasher without losing hot water. I’d suggest not putting it inside because you can hook up a water hose to it also. Handy for cleaning coolers during deer season. Also have your plumber get it. Don’t buy it at a box store. Different grades.


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Old 05-07-2019, 10:47 PM   #7
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Quote:
Originally Posted by DallasCoon12 View Post
I really like the Rinnai units mounted in an exterior wall inside the factory recess box. No venting and no taking up space in the garage or closet.
This is the only way to go, all of the connections and vents are outside, and no worry of a leak.
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Old 05-07-2019, 10:48 PM   #8
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We have a Rinnai on propane and it works great. Endless hot water.
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Old 05-07-2019, 10:52 PM   #9
Hoss163
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Navien if you want one with a recirculated pump . If your not worried about a recirculating pump then yeah go with the Rinnia with the recess box mounted in the brick .
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Old 05-07-2019, 10:56 PM   #10
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Rinnai now makes a unit with built in circulation pump as well.
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Old 05-07-2019, 10:58 PM   #11
bowhntrmatt
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I have a rinnai sensei. Ultra efficient, and has built in recirculating pump. Mine is mounted on the exterior of the home. No issues so far, other than twice in two years during storms it tripped the GFCI it’s plugged in to.

Be sure to properly size a dedicated propane line to it and have a good regulator that can maintain pressure. They burn some serious volume when you put demand on them.
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Old 05-07-2019, 10:59 PM   #12
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I forgot to mention make sure the propane company or plumber runs an adequate supply line or a dual regulator setup. The tankless heaters can be finicky if the volume and pressure is not correct.
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Old 05-08-2019, 06:29 PM   #13
Treeshark
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Quote:
Originally Posted by Notaguide View Post
AO Smith and Rinnia both make good (9.4) units that can be found at most suppliers. Price is negligible from my experience. Are you running one centralized unit in attic or exterior wall vented?
Exterior wall vented
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Old 05-08-2019, 06:37 PM   #14
rtp
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Navien all day every day.
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Old 05-08-2019, 06:43 PM   #15
Treeshark
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Thanks for all this great input. I've been so busy preparing to move and build that I haven't been able to monitor this thread. The Rinnai recessed is what my plumber recommended. I assume one that recirculates would use a lot more propane?
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Old 05-08-2019, 06:57 PM   #16
DallasCoon12
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Yes they will use a lot more propane when circulation mode is on.
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Old 05-08-2019, 06:59 PM   #17
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It’s also very important that ALL the hot water piping is insulated correctly to minimize heat loss in the circulation loop.
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Old 05-08-2019, 07:07 PM   #18
Uncle Saggy
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Takagi is the way to go.
Make sure to get the back flush valve option
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Old 05-08-2019, 07:08 PM   #19
Uncle Saggy
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Quote:
Originally Posted by Uncle Saggy View Post
Takagi is the way to go.
Make sure to get the back flush valve option


I say this as a contractor
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Old 05-08-2019, 09:54 PM   #20
Treeshark
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Quote:
Originally Posted by Uncle Saggy View Post
I say this as a contractor
I'll check it out
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Old 05-08-2019, 11:26 PM   #21
junkmanhunter
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I have either a navien or Rinnai, propane version, I love it. One thing to keep in mind. I have it mounted inside my shop on an interior wall that is an exterior wall to apartment. It is a bedroom wall and you can hear it when it runs. No biggie, just something to think about.

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