I have a Navian tankless water heater that I have had for about 8 years. I have had nothing but problems. I want to change it out to either a Rinnai or a Rheem water heater. I need about a 9.5 gpm or greater at 199,000BTU rating.
I already have the 3/4" gas line and the 3/4" water line and the condensate drain set up plus the 3" PVC vent lines so there is no reason to discuss these.
My question is which one is better. I would like one with a recirculating pump
On Wed, 13 Jun 2018 12:58:05 -0700 (PDT), email@example.com wrote:
I would suspect either one will be better than you had, as the
technology has matured somewhat - but either one is still liable to be
more trouble than "I" would put up with. Cut your losses and install a
On Wednesday, June 13, 2018 at 3:53:20 PM UTC-5, Clare Snyder wrote:
Several weeks ago on 'Ask This Old House' Richard Trethewy (I hope I spelled
that correctly) went to a man's house that had one of these tankless water
heaters that was giving him problems. Boy, what a set up he had, but
Richard reminded the audience you WILL have trouble with these type of
water heaters just like you will with a regular tank system. The warranty
is about the same but the expense is terrible considering the length of
service is no better. True, you don't have a standing tank and only use
the water when needed but for that amount of money and set up I'd expect a
25 year guarantee. I guess that's one of the reason I opted for another
regular hot water heater last year.
On Thursday, June 14, 2018 at 8:02:40 AM UTC-4, Ed Pawlowski wrote:
Big factor for me is with a tank you have hot water during power outages
that lasts at least a day, if you use it reasonably. You could even
take a couple of very quick showers if necessary. And with natural gas
and a basic tank type with a pilot light, you have unlimited hot water.
On Thursday, June 14, 2018 at 9:00:38 AM UTC-4, ItsJoanNotJoann wrote:
Yep. I see tankless fitting special applications, like where you really
need unlimited hot water in large quantity, frequently. Like maybe a
big shore rental property, where 8 people could be coming back from
the beach at the same time. But for a typical home, there is little
advantage and a lot of downside. The only advantage I'd see is eliminating
standy losses. But, as I've said before, the whole gas bill here in
summer is ~$17, which includes hot water and some gas grilling outside.
That hot water includes usage and standby loses at the tank. So, how
big could the standby losses be? Clearly they aren't significant and
that's with a basic tank, with pilot. The next step up would be a higher
efficiency tank type that would reduce standby losses more. So, I've
never seen the math.
I'm feeling a little bad for the OP. No one can give him advice on
which unit to buy, problem is I don't recall seeing anyone on here
who has one. He's in a little different situation, he's already got
one so no issues with running gas lines sufficient to support it,
etc, all the usual stuff. But from what I've seen, the tankless unit
itself costs ~$700 more than a tank type. I don't see the math
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