Rinnai NG tankless heater


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Old 08-06-16, 07:22 PM
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Rinnai NG tankless heater

Good evening...Just registered and logged on. I plan to install a Rinnai natural gas tankless heater. I wanted to install outside model but here in Nashville area, we can get very cold weather. I realize PEX pipe is resistant to freezing and you can install heat tape but we also occasionally experience power outtages. Are there other options to protect system such as NO a NC valves for cutting off supply and dumping lines.
I also want to utilize a regular electric tank type for storing hot water for recirculating. Any information would be greatly appreciated...

Thank you,
Julio
 
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Old 08-07-16, 01:06 PM
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Are there anyone out there?? Any moderators that would have information on my above post?

Thanks,
 
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Old 08-07-16, 01:14 PM
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Welcome to the forums.

I'm not the plumbing pro here.... that would be lawrosa. He may be away this weekend.

Even if you "dump" the water from the lines... the heater will still have some water left in it.
Why can't the unit be installed inside or in a protected area?
 

Last edited by PJmax; 08-07-16 at 03:02 PM.
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Old 08-08-16, 07:30 AM
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I also want to utilize a regular electric tank type for storing hot water for recirculating
Why not just get a unit with a tank, then?
 
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Old 08-20-16, 08:44 AM
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Could you elaborate more on "unit with tank"?
 
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Old 08-20-16, 08:47 AM
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Well...since my first post, I have decided to relocate to an inside location, so that issue went away.
Thanks!
 
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Old 08-20-16, 10:54 AM
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Thanks for the update.

What I didn't pick up on originally is that it doesn't make much sense to spend a lot of money on a tankless heater to heat water for a storage tank. Actually defeats the whole purpose of a tankless.

Much more effective to install a tank type high end gas water heater.
 
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Old 08-22-16, 05:22 AM
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I hear what you are saying. How then, do you incorporate a circulating pump with tankless? I know some builders in my area have incorporated a storage tank and circulating pump with tankless heaters.
Thanks!
 
 

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