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Subject Author Date
Cost of geothermal heat pumps Frank G 10-20-2006
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Posted by Noon-Air on October 21, 2006, 4:40 pm

>
>>Customer 2, and engineer at the State Veterans Home
>>4875 sq ft, two story. Changed his building plans to accomodate the
>>Geothermal system available. EVERYONE quoted a 3 ton or less, we put in a
>>6
>>ton unit and oversized the loop. Average electric bill is about $110.
>
> Rich -
>
> I know you said you weren't going to reply again, but I'm curious as
> to why the large discrepancy in sizing here? Poor load calcs? Trying
> to cut corners? And was this in a cold or warm climate?
>
> Thanks!

It was what they had on hand. Load calcs had nothing to do with it.

"Changed his building plans to accomodate the Geothermal system available."



Posted by geojr on October 21, 2006, 8:27 pm

>
>>Customer 2, and engineer at the State Veterans Home
>>4875 sq ft, two story. Changed his building plans to accomodate the
>>Geothermal system available. EVERYONE quoted a 3 ton or less, we put in a
>>6
>>ton unit and oversized the loop. Average electric bill is about $110.
>
> Rich -
>
> I know you said you weren't going to reply again, but I'm curious as
> to why the large discrepancy in sizing here? Poor load calcs? Trying
> to cut corners? And was this in a cold or warm climate?
>
> Thanks!
The other bozos undersized the units- we were able to correctly size the
unit ( after homeowner made our recommended building changes ) and loop so
that resistance heat would not eat his electric bill up. The three ton units
would have killed him and we were able to show this with the load calcs.



Posted by Bob Pietrangelo on October 20, 2006, 3:39 pm
Tranes Geothermal heat pumps arer junk. They are made by a company out of
Wako, TX. Are single speed PSC units. I am having a brain fart about the
company's name. The WFI Envision unit is the most efficient unit on the
MArket right now. Especially the 3 ton unit. Make sure you are sizing by th
eHeat Load and not the cooling load. Price sounds right in line. Loop
actually seems cheap.

--
Bob Pietrangelo
bobp3@comcast.net
bob@comfort-solution.biz
www.comfort-solution.biz
On Time or Your Service Call is FREE
Preventive Maintenance Specialist




>I have been researching geothermal heat pumps for a while. The general
> opinion is that the installation of ground source heat pumps (without the
> loop) may be slightly higher than air source heat pumps. However, when
> asking about the new WaterFurnace Envision heat pump, I receive ballpark
> numbers that I cannot believe. One vendor told me that a 3-ton
> WaterFurnace
> Envision would be around $13K including installation but without the
> vertical ground loop (which would be an extra $6K), while a friend of mine
> installed a Trane system 7 years ago for less than $12K including the
> vertical ground loop.
>
> Are WaterFurnace GSHP really that much more expensive? Or does that guy
> think these are space shuttle parts?
>
> Thanks,
> Frank
>
>
>
>



Posted by PrecisionMachinisT on October 20, 2006, 3:58 pm

> Tranes Geothermal heat pumps arer junk. They are made by a company out of
> Wako, TX. Are single speed PSC units. I am having a brain fart about the
> company's name. The WFI Envision unit is the most efficient unit on the
> MArket right now. Especially the 3 ton unit. Make sure you are sizing by
th
> eHeat Load and not the cooling load. Price sounds right in line. Loop
> actually seems cheap.
>

Perhaps :

http://www.commandaire.com/

> --
> Bob Pietrangelo
> bobp3@comcast.net
> bob@comfort-solution.biz
> www.comfort-solution.biz
> On Time or Your Service Call is FREE
> Preventive Maintenance Specialist
>
>
>
>
> >I have been researching geothermal heat pumps for a while. The general
> > opinion is that the installation of ground source heat pumps (without
the
> > loop) may be slightly higher than air source heat pumps. However, when
> > asking about the new WaterFurnace Envision heat pump, I receive ballpark
> > numbers that I cannot believe. One vendor told me that a 3-ton
> > WaterFurnace
> > Envision would be around $13K including installation but without the
> > vertical ground loop (which would be an extra $6K), while a friend of
mine
> > installed a Trane system 7 years ago for less than $12K including the
> > vertical ground loop.
> >
> > Are WaterFurnace GSHP really that much more expensive? Or does that guy
> > think these are space shuttle parts?
> >
> > Thanks,
> > Frank
> >
> >
> >
> >
>
>




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