Author	[Modern View]
Dusty MI 01-20-2013 05:23:59 76.250.62.134 Report to Moderator	On a pump and dump geo system, how do you calculate the amount of water you need to pump ? Dusty [Reply]   [No Email]
fergienewbee 01-20-2013 17:13:15 99.181.136.162 Report to Moderator	Re: Geo-thermo in reply to Dusty MI, 01-20-2013 05:23:59   I passed on that system. I just could not justify dumping that much water. If you have a pond, that might be different. My BIL did his own system and dumped water down an abandoned well. Larry [Reply]  [No Email]
George Marsh 01-22-2013 13:12:54 50.104.202.156 Report to Moderator	Re: Geo-thermo in reply to fergienewbee, 01-20-2013 17:13:15   fergienewbee, I'm with you on spending too much money on pump and dump or geo's for that matter. Look at the total expence, look at the life expectancy, then calculate how much it's going to save you. The bottom line: Is it really worth it? Some say windmills have a life expectancy of 20 years and it takes 50 years to pay them off. If it weren't for tax and electric breaks, is it really worth it? Not to mention, there is always something that is going to need repaired. I'm not so sure when you factor in the cost of the well, how much it cost to pump water, is it really worth it? Would like to see real data, not just use what the guy selling you the unit says it will save. How many people have a geo heat pump that lasted 20 years and didn't have a service call? How much did it cost and how much did it save? [Reply]  [No Email]
W_B 01-23-2013 11:29:31 155.188.183.17 Report to Moderator	Re: Geo-thermo in reply to George Marsh, 01-22-2013 13:12:54   Quoting Removed, click Modern View to see I don't have my figures anymore but when we built our log house in 1992 we calculated a 7 year payback. We did it not the dealer as I was skeptical too. No tax breaks, no electricity cost breaks. We used a ground source system and not a well. In ten years there we only had the bearing go out on a circulation pump, covered under warranty. Was it worth it? Absolutely. If I ever build again I'll put it in. Let's face it what can you install today that won't need a service call, let alone go 20 yrs. without one? [Reply]  [No Email]
Dusty MI 01-21-2013 13:37:02 76.250.62.134 Report to Moderator	Re: Geo-thermo in reply to fergienewbee, 01-20-2013 17:13:15   I have a pond that needs the water. Just don't know if my 5" well and pump can produce enough. I will need about 50,000 btu. Ground water here is 55*. Dusty [Reply]  [No Email]
DH in Carolina 01-20-2013 07:54:24 173.212.6.174 Report to Moderator	Re: Geo-thermo in reply to Dusty MI, 01-20-2013 05:23:59   Miami heap pumps call for 2.4 gpm per ton on evaporator side in heating or cooling, with a 10 degrees temp differance on condenser side. [Reply]  [No Email]
john *.?-!.* cub owner 01-20-2013 07:36:49 69.179.136.30 Report to Moderator	Re: Geo-thermo in reply to Dusty MI, 01-20-2013 05:23:59   Hydro-temp.com has quite a bit of information on their site. One of the notes I found was that pump and dump uses about 1gpm per ton of cooling/heating. Per example, my house is 1200 sq ft. and is heavily insulated, and uses a 2 ton system, so I would need a well, or what ever source, capable of providing 2 gallons of water per minute. This post was edited by john *.?-!.* cub owner at 07:37:33 01/20/13. [Reply]  [No Email]
David G 01-20-2013 05:32:31 205.215.206.18 Report to Moderator	Re: Geo-thermo in reply to Dusty MI, 01-20-2013 05:23:59   You need to know how many BTU's are needed on the water. I think the calculation is: BTU = (Temp in - Temp Out) * GPM * 500 [Reply]  [No Email]