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Started By
Message
Tankless water heaters-which one does HG recommend
Posted on 7/27/25 at 9:21 pm
Posted on 7/27/25 at 9:21 pm
Looking for a propane tankless.
Also, do ya'll like the exterior wall ones, or in attic options? Location is Louisiana.
Also, do ya'll like the exterior wall ones, or in attic options? Location is Louisiana.
This post was edited on 7/27/25 at 10:05 pm
7
Posted on 7/27/25 at 9:58 pm to indytiger
Who installs it and how it’s installed is more important.
Posted on 7/27/25 at 10:02 pm to indytiger
Rheem
This is the one I have had for 17 years. Only changed the fuses a few times due to lightning.
Feeds 3 showers and 3 sinks.
https://www.rheem.com/product/rheem-rheem-thermaforce-super-high-efficiency-condensing-tankless-gas-water-heaters-rtgh-l199i/
This is the one I have had for 17 years. Only changed the fuses a few times due to lightning.
Feeds 3 showers and 3 sinks.
https://www.rheem.com/product/rheem-rheem-thermaforce-super-high-efficiency-condensing-tankless-gas-water-heaters-rtgh-l199i/
Posted on 7/27/25 at 10:21 pm to indytiger
quote:
exterior wall ones, or in attic options?
anytime you can limit or eliminate pressurized water devices/lines above a living space is a great thing.
Posted on 7/27/25 at 11:25 pm to Turnblad85
quote:
anytime you can limit or eliminate pressurized water devices/lines above a living space is a great thing.
While I do agree with that, and also would prefer an outside one for maintenance flushing, I'm curious how they do in the cold.
Posted on 7/28/25 at 5:02 am to indytiger
It has an onboard heater that comes on when the temp drops. You just need to protect exposed water lines.
Posted on 7/28/25 at 12:00 pm to Jimbowie397
We've used Rinnai in our rental cabins and home since 2017. (5 total) Never had an issue with any of them.
Certainly no expert but this is coming from real world use from an average joe. No offense for the above average Joes out there.
Certainly no expert but this is coming from real world use from an average joe. No offense for the above average Joes out there.
Posted on 7/29/25 at 5:41 am to indytiger
quote:
I'm curious how they do in the cold.
They certainly can freeze just like any exterior water piping, but proper installation should mitigate the probability. I wouldn’t put it in the attic.
This post was edited on 7/29/25 at 5:49 am
Posted on 7/29/25 at 8:46 am to indytiger
We've had the Rinnai R94 for about 7 years now with zero complaints. The unit had stood through several hard freezes (down to 9 degrees one year) with zero issue.
Do note that if you lose electricity, you will lose hot water as the circuit board runs off electricity. They sell a backup battery which might be worth looking in to if you live in an area where that could be an issue.
Also FYI because no one told us when we bought ours, when freezing weather comes you have to drip BOTH cold and hot. With the hot, you want the smallest drip you can do so that the water moves enough to not freeze, but not enough to kick on the tankless unit.
Do note that if you lose electricity, you will lose hot water as the circuit board runs off electricity. They sell a backup battery which might be worth looking in to if you live in an area where that could be an issue.
Also FYI because no one told us when we bought ours, when freezing weather comes you have to drip BOTH cold and hot. With the hot, you want the smallest drip you can do so that the water moves enough to not freeze, but not enough to kick on the tankless unit.
Posted on 7/29/25 at 10:58 pm to indytiger
We have a Navien NPE-A Series condensing tankless water heater that runs on Natural Gas but they also can run on Propane. We have had it for 3 years and it has worked perfectly with no issues. Since it is a condensing version, it's vent is a PVC pipe to the outside wall and the water heater itself is installed on a wall perpendicular to the outside wall. It doesn't vent any heat at all like a non condensing model that requires a metal vent pipe. We installed a whole house water filter at the same time. This is because it makes a big difference and almost eliminates scaling issues common with natural gas (and also propane) tankless water heaters if you have hard water.
I didn't know how whole house water filters reduce scale so here is an AI response......"Whole house water filters can help mitigate scale buildup in tankless water heaters. By filtering out sediment and minerals, they can improve water quality and potentially extend the lifespan and efficiency of the heater. However, it's important to understand that not all whole house filters are designed to address scale, and those that do may not completely eliminate it."
I didn't know how whole house water filters reduce scale so here is an AI response......"Whole house water filters can help mitigate scale buildup in tankless water heaters. By filtering out sediment and minerals, they can improve water quality and potentially extend the lifespan and efficiency of the heater. However, it's important to understand that not all whole house filters are designed to address scale, and those that do may not completely eliminate it."
This post was edited on 7/29/25 at 11:12 pm
Posted on 7/30/25 at 8:09 am to indytiger
Navien NPE-240A2
Rinnai RXP199i
Rheem RTGH-SR11
These are the big three at the moment.
-All are condensing units (high-efficiency) that can be vented with PVC (this will save you money on your utility bill as well as installation).
- All can be converted to indoor or outdoor use.
- All can be used with either NG or LP, are 1/2" gas line compatible (this will save you hundreds on install).
- And all have a built-in recirculating feature...meaning you never have to wait more than a few seconds for hot water to reach you.
Rinnai RXP199i
Rheem RTGH-SR11
These are the big three at the moment.
-All are condensing units (high-efficiency) that can be vented with PVC (this will save you money on your utility bill as well as installation).
- All can be converted to indoor or outdoor use.
- All can be used with either NG or LP, are 1/2" gas line compatible (this will save you hundreds on install).
- And all have a built-in recirculating feature...meaning you never have to wait more than a few seconds for hot water to reach you.
This post was edited on 7/30/25 at 8:10 am
Posted on 7/30/25 at 8:38 am to indytiger
We have an exterior non-condensing Rinnai with a built in recirculating pump and dedicated HW return line - LP, 199 BTU. Love it. We got down to 3 degrees this winter and remained under freezing for at least two days. We also lost power and water for several hours during this cold snap. Exterior water lines are insulated. When we lost power I just killed the gas and drained the unit - very easy to do. When power came back on I just closed the drain valves and turned the gas on and it fired right up. Also closed the main valve and drained the whole house. Highly recommend this unit. That was a very unusual cold snap with utility outages and really happy with how it turned out.
Posted on 7/30/25 at 9:07 am to T-Jon
quote:
They certainly can freeze just like any exterior water piping, but proper installation should mitigate the probability. I wouldn’t put it in the attic.
does the OP have the option of mounting it in a garage? That, to me, would be the best location.
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