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Geothermal in Michigan
Last Post 09 Aug 2008 11:26 PM by joe.ami. 6 Replies. |
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bgillett
New Member
Posts:18
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| 07 Aug 2008 11:01 PM |
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I am looking at putting a geo system in a older home in Michigan. I have a complicated project. The main home is 3200 sq ft - and I have a pool room that is 1500 sq ft that needs a dehumidifier and a heat source for the air and the pool water.
I have been told that I need a 5 ton geo system for the house, a 5 ton system for the pool and a 6 ton dehumidifier for the pool. I also need new ductwork for the house and ductwork for the dehumidifier in the pool space. I have to go vertical loops for my systems.
One estimate I got was $70,000. Does that sound right? The estimate had $28,000 for 10 vertical loops.
Also, why is domestic hot water so expensive for a DX system(5,500 for one estimate) versus a traditional system ($500)?
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Brock
Advanced Member
Posts:599
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| 07 Aug 2008 11:55 PM |
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Hi, we have an indoor pool 15x30, 4 to 8 feet with a 7x8 hot tub, but the room is smaller, only 900 sf ft with geo heating the pool and hot tub and cooling the house.
Is this a new construction? Do you intend to keep the pool covered? If so just use an HRV an exhaust from the room and skip the desert air. The thing we found is we have two 150k BTU heat exchangers on the hot side of a 4 ton heating the pool/hot tub. He went with one originally but the hot side was up at 130F when the bot tub was at 100F, with two in series we are 115F with the hot tub at 100F.
If you do want to dehumidify the pool room use the cold side of the geo before it goes out to the field, then warm it back up, by far the cheapest way to go, I certainly wouldn't use a separate dehumidification system. |
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| Green Bay, WI. - 4 ton horizontal goethermal, 16k gallon indoor pool, 3kw solar PV setup, 2 ton air to air HP, 3400 sq ft |
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bgillett
New Member
Posts:18
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| 08 Aug 2008 08:44 AM |
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Posted By Brock on 08/07/2008 11:55 PM
Hi, we have an indoor pool 15x30, 4 to 8 feet with a 7x8 hot tub, but the room is smaller, only 900 sf ft with geo heating the pool and hot tub and cooling the house.
Is this a new construction? Do you intend to keep the pool covered? If so just use an HRV an exhaust from the room and skip the desert air. The thing we found is we have two 150k BTU heat exchangers on the hot side of a 4 ton heating the pool/hot tub. He went with one originally but the hot side was up at 130F when the bot tub was at 100F, with two in series we are 115F with the hot tub at 100F.
If you do want to dehumidify the pool room use the cold side of the geo before it goes out to the field, then warm it back up, by far the cheapest way to go, I certainly wouldn't use a separate dehumidification system. It is not a new construction. (The house is new to us, but the the pool room is approx 10 years old and the house is approx 100 years old w/ a couple of additions over the years.) Yes, we intend to keep the pool covered.
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Brock
Advanced Member
Posts:599
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| 08 Aug 2008 10:18 AM |
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The hard part will be finding a contractor that understands pool and won't just throw everything at it. Our utility bill last month was $152, a friend of ours heating his pool with gas with desert air and and running traditional AC had a bill of just over $1400, then again he leaves his pool uncoverd a lot. Check out our pool page, it might give you some more information, feel free to email if you need more info. |
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| Green Bay, WI. - 4 ton horizontal goethermal, 16k gallon indoor pool, 3kw solar PV setup, 2 ton air to air HP, 3400 sq ft |
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joe.ami
Veteran Member
Posts:4377
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| 09 Aug 2008 09:25 PM |
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Just spoke yesterday with a fellow that did a job like yours in the Gr. Rapids area. We were discussing different strategies for multi-tasking equipment and had several job specific ideas.
Generally speaking, is your lot too small for horizontal loops? They tend to be less expensive.
Regarding the question of DX domestic hot water, I can't be certain, but I suspect you are comparing on demand to supplemental hot water.
Many a poorly designed system has damaged homes with indoor pools. I agree with Brock that you need to make sure your installers know what they're doing. |
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Joe Hardin
www.amicontracting.com
We Dig Comfort!
www.doityourselfgeothermal.com
Dig Your Own Comfort! |
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bgillett
New Member
Posts:18
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| 09 Aug 2008 10:52 PM |
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Posted By joe.ami on 08/09/2008 9:25 PM
Just spoke yesterday with a fellow that did a job like yours in the Gr. Rapids area. We were discussing different strategies for multi-tasking equipment and had several job specific ideas.
Generally speaking, is your lot too small for horizontal loops? They tend to be less expensive.
Regarding the question of DX domestic hot water, I can't be certain, but I suspect you are comparing on demand to supplemental hot water.
Many a poorly designed system has damaged homes with indoor pools. I agree with Brock that you need to make sure your installers know what they're doing. We have 3.7 acres but there are trees all over the place. One of the quotes that I have for the pool room is for a 5 ton geo based Dry-Air unit that will do both the dehumidifying and heat the pool and the air. This installer is pushing for open loop systems b/c he quoted me 28,000 for the 10 vertical loops. Does anybody know about the Geo based Dry-Air systems or about similar systems that do both the heating and dehumidifying for a pool area?
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joe.ami
Veteran Member
Posts:4377
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| 09 Aug 2008 11:26 PM |
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Dry Air systems come from Holly Michigan, and know their business/work well. I believe they are assembled by FHP. Owner/founder Bob Posch very knowledgeable and big open loop proponent. www.dry-air.com
Seems like you would have a horizontal loop oppurtunity, but don't be afraid of open loop if your water quality is good. While it does have more maintenance, you do get loosely 20% more heating btu's and therefore can use smaller appliances and duct systems (ducts are usually our biggest issue with retro work).
Get more estimates. |
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Joe Hardin
www.amicontracting.com
We Dig Comfort!
www.doityourselfgeothermal.com
Dig Your Own Comfort! |
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