| [GMCnet] Re: Guess what’s coming to Chez Denney [message #363017 is a reply to message #362963] |
Wed, 24 March 2021 09:58   |
Richard Denney
Messages: 920
Registered: April 2010
Karma:
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Senior Member |
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Trying again with more trimmage. I do not like the way Gmail makes it
difficult to trim (or even see) quotes.
Les, I can't help, unfortunately. That system was installed by the guy that
built the house in 1979, and we didn't move into it until 2002. That system
had long been abandoned. My understanding from talking to him was that the
system needed more than 10 GPM from a well, and the well couldn't keep up.
They actually ended up drilling another well, and used the old well for
irrigation. I have not used the old well in many years because the pump
needs to be replaced and I don't need it enough to spend the coupla grand
that would take. (I don't need it at all, actually, though that may change
with my new-found interest in agriculture :)
The new well flows 9-10 GPM, which is abundant for normal residential
purposes.
I've since replaced the forced-air system, and had to redesign a bunch of
it. When they retrofit it into the house, they had the evaporator coil
mounted upstream of the air handler, used inadequate filtration, and had it
mounted so the flow was going the wrong direction (i.e., they mounted it
"upright" to preserve the condensate drain configuration but the duct they
mounted it in was a downdraft return-air duct). I removed the old A coil
evaporator and installed an N-coil evaporator right above the furnace air
handler where it should be. The AC is a hybrid-heat system--heat pump
supplemented by a propane-fired furnace when the ambient temperatures are
below 36 degrees. It's efficient, but the supply ducts in the house are not
properly sized and the upstairs gets hot in the summer. Then, there's the
total lack of insulation between the unconditioned attic and the upstairs
bedrooms, even though the roof of the attic is insulated with R24 batts. I
need to close off the gable vents altogether (which aren't needed even
now), finish the interior paneling in the attic to divorce it from the
ridge vents, and then put in a small air-conditioner up there to condition
the attic space. My Covid hobby last spring was building a proper staircase
to the attic--but our house is architect-designed and it's all too strange
to describe.
Rick "who has laid eyes just once on that underground 3500-gallon tank"
Denney
>
> On Wed, Mar 24, 2021 at 6:44 AM Les Burt wrote:
>
>> Rick,
>> I’m extremely curious to know more about your failed geothermal system.
>> I’m in the planning/designing stages for a well-sourced (open loop) system
>> here at home, and have been researching the subject. Knowing more about
>> your system might help me avoid a few issues with mine.
>>
>> From your description, it sounds as though your well would run out of
>> water. This is typically caused by no return line back to the source. A
>> simple solution would be to return the water used by the geothermal back
>> into the same well. By doing so, the well never runs dry, and the water
>> table is usually large enough that the water temp is barely affected. This
>> is becoming a common practice in some areas, but most installers prefer
>> closed-loop due to higher profits and lower maintenance for the owner.
>>
>> If you are willing to discuss this in more detail, We can continue here,
>> take it to email, or even a phone call.
>> Just let me know.
>>
>> Les Burt
>> Montreal
>> '75 Eleganza 26'
>>
>
> --
> '73 X-Glacier 230 "Jaws"
> Northern Virginia
> Offlist email: rick at rickdenney dot com
>
--
'73 X-Glacier 230 "Jaws"
Northern Virginia
Offlist email: rick at rickdenney dot com
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