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Old 04-08-2009, 09:23 PM   #1
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Geothermal heat and air systems


We are getting quotes on installation of geothermal heating and air and would like some opinions on how the Carrier units compare with the Florida units in effeciency, reliability and price. Also we would love to hear from anyone in Southeastern US that has geothermal heating and air.
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Old 04-09-2009, 08:56 AM   #2
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Geothermal heat and air systems


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Originally Posted by Checkered View Post
how the Carrier units compare with the Florida units in . . .reliability and price.
Extended service warranty costs are determined from the likelihood of a part failure x the cost of that part, plus the cost of overhead for the people administering the warranty.
Knowing the price of parts for the two brands from HVAC supply houses and
knowing the price of extended service contracts for the two brands,
you can, in principle, figure out relative reliability.

The controller boards seem to be both costly and unreliable. Any warranty money might be better spent on surge suppressors and post-installation checks by an indep. HVAC consultant.

For absolute reliability numbers, there is always MIL-STD-217. This is about the most tedious calculation known to man.

HVAC reliability seem to rest on
the rel. of the unit,
the quality of the install and
the ductwork being of proper size.

This last one can be determined by a Manual D calc.

The second one is determined by the honesty and competence of the tech, in addition to the chance that he/she is not having a bad day.
The odds of honesty+competence+having a good day+actually caring about the work I would put at less than 50%.


Last edited by Yoyizit; 04-09-2009 at 09:26 AM.
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Old 04-09-2009, 09:20 AM   #3
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Geothermal heat and air systems


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Originally Posted by Checkered View Post
We are getting quotes on installation of geothermal heating and air and would like some opinions on how the Carrier units compare with the Florida units in effeciency, reliability and price.

I assume you are referring to Florida Heat Pump FHP. The carrier units are Climate Master in disguise (or at least they were a couple of years ago). Maybe that will help you with your comparison.

From what I know, both are good units. Remember when you compare, that you are comparing apples to apples, regarding desuperheaters, ECM vs standard blowers, R22 vs 410a etc.

In the end, a good installation will be the best unit for whatever money you pay.
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Old 04-09-2009, 09:22 AM   #4
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Geothermal heat and air systems


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Originally Posted by Yoyizit View Post
The second one is determined by the honesty and competence of the tech, in addition to the chance that he/she is not having a bad day.
The odds of honesty+competence+having a good day+actually caring about the work I would put at less than 50%. How do you spell c-a-l-l-b-a-c-k?

Well said
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Old 04-09-2009, 09:28 AM   #5
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Well said
Thank you, Mr. D. And I don't even do HVAC. . .

BTW, here's something I found on the web
"The cost of a geothermal heat pump is about $2500 per ton of capacity".
Dunno' what the +/- tolerance on this cost is, though.

Here's another
http://www.google.com/search?client=...UTF-8&oe=UTF-8

Last edited by Yoyizit; 04-09-2009 at 01:42 PM.
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