New water heater questions.

Posted by Bubba on August 2, 2007, 9:45 pm

[[[ Loads and Loads of jibberish removed from this area]]]

>> I guess that's basically what Im getting at. Im not argueing with you.
>> :-) Id like to see an actual comparison of some sort showing what the
>> operating costs of both would be under the exact same conditions.
>> It's just like air conditioning SEER's. It takes a lot of savings to
>> make up for the cost of the high eficiency SEER units.
>> Bubba

>I agree 100% with you. And every job is different.
>This fall I'm putting retrofitting my heat pump to heat my hot water in
>summer and during off times in the heating season. My electrical rate is a
>third of my gas rate per therm..
>Rich

Sounds interesting.
Do you have an air to air heat pump?
Is this going to be a "home grown" project or something "off the
shelf"?
Bubba

Posted by pRECISIONmachinisT on August 3, 2007, 11:58 pm

> > I guess that's basically what Im getting at. Im not argueing with you.
> > :-) Id like to see an actual comparison of some sort showing what the
> > operating costs of both would be under the exact same conditions.
> > It's just like air conditioning SEER's. It takes a lot of savings to
> > make up for the cost of the high eficiency SEER units.
> > Bubba

> I agree 100% with you. And every job is different.
> This fall I'm putting retrofitting my heat pump to heat my hot water in
> summer and during off times in the heating season. My electrical rate is a
> third of my gas rate per therm..

Depending on exactly where you plumb the coil then can also use these during
wintertime.

http://www.trevormartin.com/manuals.asp

--

Posted by Geoman on July 31, 2007, 5:34 pm

I missed your idea of and electric tank...

Things to consider:

First he'd have to run another power supply, cost of wire, breaker, box's.
The cost of an 80 gallon is about the same as a PV system, low recovery,
possible energy cost increase depending on cost per therm of electric vs.
fossil fuel. If he's in a town with inspectors he may have to take two
permits out, one electrical and one plumbing.

BTW, I think the original post was his concern about venting, chimney
damage, so, I think the PV system is cheaper than a liner which isn't the
best solution unless you can use B-vent.

Posted by Bubba on July 31, 2007, 11:47 pm

>I missed your idea of and electric tank...
>Things to consider:
>First he'd have to run another power supply, cost of wire, breaker, box's.
>The cost of an 80 gallon is about the same as a PV system, low recovery,
>possible energy cost increase depending on cost per therm of electric vs.
>fossil fuel. If he's in a town with inspectors he may have to take two
>permits out, one electrical and one plumbing.
>BTW, I think the original post was his concern about venting, chimney
>damage, so, I think the PV system is cheaper than a liner which isn't the
>best solution unless you can use B-vent.

I just did one in a condo. The guy had a 50 gal power vented water
heater. He wanted to change it so I gave him a price. He was shocked
as most are.
Anyways, I started asking a few questions. I found out he was THE ONLY
person in the condo. I asked if he ever had family or friends over to
spend the night. He said not enough to warrant a bigger heater just
for those couple times. I asked if he had any large whirlpool of hot
tub. He said no. I sold him a 50 gal electric water heater. Main panel
was about 15 ft of wire away and no holes, ceilings or walls to go
through. Many spaces left in the panel to accept a new double pole
breaker. I installed a 3" pvc cap on the old vent. Electricity is
relatively cheap here compared to gas so it was a no brainer.
Bubba

Posted by Geoman on August 1, 2007, 8:38 am

> I just did one in a condo. The guy had a 50 gal power vented water
> heater. He wanted to change it so I gave him a price. He was shocked
> as most are.
> Anyways, I started asking a few questions. I found out he was THE ONLY
> person in the condo. I asked if he ever had family or friends over to
> spend the night. He said not enough to warrant a bigger heater just
> for those couple times. I asked if he had any large whirlpool of hot
> tub. He said no. I sold him a 50 gal electric water heater. Main panel
> was about 15 ft of wire away and no holes, ceilings or walls to go
> through. Many spaces left in the panel to accept a new double pole
> breaker. I installed a 3" pvc cap on the old vent. Electricity is
> relatively cheap here compared to gas so it was a no brainer.
> Bubba

I agree with you on this one, I've done it as well, especially when Ohio Ed
offered KW discounts of 3 demands to use them, but they required an 80
gallon except for condos and apartment buildings.

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New water heater questions. - Page 3