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Tankless Hot Water Heaters Gary KW4Z 01-04-2007
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Posted by Dan_Musicant on January 5, 2007, 9:19 pm

:hallerb@aol.com says...
:>
:> # Fred # wrote:
:> > And I guess a UPS that would supply power for more than 1/2
:> > > hour or so is going to be costly. So's a generator.
:> > >
:> > > Dan
:> >
:> > Should be cheap as not much power required to control the gas fired unit. Go
:> > to any office or computer store and get one suitable for you unit - should
:> > be under $100. You need to replace the UPS battery once every few years.
:>
:> ahh check the current use of the tankless, if it uses a fan for exhaust
:> you may need a really large UPS.
:
:My Takagi draws less than an amp maximum, and that's briefly while the
:blower is clearing the exhaust after the burner shuts off; most of the
:time it's much lower draw. Any decent UPS can handle 120W loads.

You know, I really don't think it's worth it to get a UPS just to insure
I have hot water if my power goes out. I'll be a lot more concerned
about the power and especially the food in my refrigerator going bad.
Hot water? Holy smokes, my ancestors had to build a fire to get it. I'm
not going to be such a pussy about it.

Dan

Posted by on January 5, 2007, 10:07 pm
dmusicant@pacbell.net says...

> You know, I really don't think it's worth it to get a UPS just to insure
> I have hot water if my power goes out. I'll be a lot more concerned
> about the power and especially the food in my refrigerator going bad.

Frozen casseroles from the deep freeze will keep the fridge cold enough
that milk lasts for many days. Think of it as an icebox with edible
ice. Some of the frozen stuff is going to thaw anyway, might as well
put it to use.

> Hot water? Holy smokes, my ancestors had to build a fire to get it. I'm
> not going to be such a pussy about it.

While the house was jacked up getting a new foundation, we spent 6 weeks
with the gas disconnected. Boiling water on the stove for baths gets
old fast when you have twin toddlers.

--
josh@phred.org is Joshua Putnam
<http://www.phred.org/~josh/>
Braze your own bicycle frames. See
<http://www.phred.org/~josh/build/build.html>

Posted by on January 4, 2007, 11:34 pm
dmusicant@pacbell.net says...

> The responses in this thread already taught me one thing: I think I need
> a UPS if I don't want to do without hot water in the event of a power
> failure. I guess it's no big deal, actually. Power failures, at least
> ones that last longer than a few seconds, are pretty rare here. Being
> without power would be a much bigger inconvenience than being without
> hot water. And I guess a UPS that would supply power for more than 1/2
> hour or so is going to be costly. So's a generator.

My Takagi draws little enough current that if the power is out, I can
run it off the pocket-sized power inverter I keep in my car. No added
cost for that, I already had the inverter anyway.

--
josh@phred.org is Joshua Putnam
<http://www.phred.org/~josh/>
Braze your own bicycle frames. See
<http://www.phred.org/~josh/build/build.html>

Posted by hallerb@aol.com on January 5, 2007, 8:33 am
My Takagi draws little enough current that if the power is out, I can
> run it off the pocket-sized power inverter I keep in my car. No added
> cost for that, I already had the inverter anyway.
>
> --
> josh@phred.org is Joshua Putnam

Odd the Takagi website doesnt list current consumption,'

In any case those who vent up a chimney are probably low power users in
comparison with direct vent models that must use a blower & motor for
exhaustion of course chimney type often need chimney upgrades because
the high BTU models are perhaps 3 times the BTU of a average forced air
furnace.

this makes me wonder about that big flue exhausting heated home air
24/7 all winter long... humm I wonder the same about my standard hot
water tank and furnace, must be like leaving a big window open
permanetely.

wonder if anyone has ever done studies of flue heat losses?

Because oif this awhile ago I had decided to go with forced vent
standard high BTU tank.....


Posted by CptDondo on January 5, 2007, 1:33 pm
hallerb@aol.com wrote:

>
> this makes me wonder about that big flue exhausting heated home air
> 24/7 all winter long... humm I wonder the same about my standard hot
> water tank and furnace, must be like leaving a big window open
> permanetely.
>
> wonder if anyone has ever done studies of flue heat losses?

Don't most current building codes require outside combustion air these days?

--Yan

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