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Heat Pump or Ground Source Heat Pump?

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Heat Pump or Ground Source Heat Pump? RO 07-06-2008
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Posted by RO on July 6, 2008, 12:18 pm
Since I live just north of Seattle, the winter temperature rarely dips below
forty degrees. And - since ground source heat pumps are more expensive
then regular heat pumps would it make more sense to install a regular heat
pump.

I have propane heat now and could use that as a backup for cold snaps, but
the price of propane is now sky-high.

Thanks,
RO

--




Posted by dpb on July 6, 2008, 1:59 pm
RO wrote:
> Since I live just north of Seattle, the winter temperature rarely dips below
> forty degrees. And - since ground source heat pumps are more expensive
> then regular heat pumps would it make more sense to install a regular heat
> pump.
...

A good installer can do a payback analysis, but at those minimum air
temperatures an air-exchange will be adequate, certainly and unless you
have a very ready ground source (like an adequate-sized lake real close
to bury an exchange loop in) the payback time will be quite long...

--

Posted by S. Barker on July 6, 2008, 2:11 pm
If you're temps rarely go below 40, then you'd never see the benefit of
ground source. air to air works fine down to 35 or so. Propane still $2.09
a gallon here in the mid west. How much is yours?

s


> Since I live just north of Seattle, the winter temperature rarely dips
> below forty degrees. And - since ground source heat pumps are more
> expensive then regular heat pumps would it make more sense to install a
> regular heat pump.
>
> I have propane heat now and could use that as a backup for cold snaps, but
> the price of propane is now sky-high.
>
> Thanks,
> RO
>
> --
>
>
>



Posted by RO on July 7, 2008, 12:47 am
Propane here on Whdbey Island is over $3/gal.

--
Robert Olin
Bob's Water & Septic LLC
jolin@whidbey.net


> If you're temps rarely go below 40, then you'd never see the benefit of
> ground source. air to air works fine down to 35 or so. Propane still
> $2.09 a gallon here in the mid west. How much is yours?
>
> s
>
>
>> Since I live just north of Seattle, the winter temperature rarely dips
>> below forty degrees. And - since ground source heat pumps are more
>> expensive then regular heat pumps would it make more sense to install a
>> regular heat pump.
>>
>> I have propane heat now and could use that as a backup for cold snaps,
>> but the price of propane is now sky-high.
>>
>> Thanks,
>> RO
>>
>> --
>>
>>
>>
>
>



Posted by Cwatters on July 7, 2008, 5:16 am

> If you're temps rarely go below 40, then you'd never see the benefit of
> ground source. air to air works fine down to 35 or so. Propane still
> $2.09 a gallon here in the mid west. How much is yours?
>

In the UK the running cost of a GSHP (COP about 3.5) is a lot less than an
ASHP (COP about 2.0) but the capital cost of GSHP does make it expensive to
install.

You generally get best performance when a heap pump is matched with low
temperature heating system such as UFH.




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