Geothermal HVAC Myths Busted https://www.minisplitunit.org/ 1. Geothermal HVAC systems are not considered a renewable technology because they use electricity 2. Photovoltaic and wind power are more favorable renewable technologies when compared to geothermal HVAC systems. 3. Geothermal HVAC needs lots of yard or real estate in which to place the polyethylene piping earth loops. 4. Geothermal HVAC heat pumps are noisy. 5. Geothermal systems eventually “wear out.” 6. Geothermal HVAC systems only work in heating mode. 7. Geothermal HVAC systems cannot heat water, a pool, and a home at the same time. Fact: Systems can be designed to handle multiple loads simultaneously. 8. Geothermal HVAC systems put refrigerant lines into the ground. 9. Geothermal HVAC systems use lots of water. 10. Geothermal HVAC technology is not financially feasible without federal and local tax incentives.

Re: bob brown Hi Bob, IÂm glad to see youÂre paying attention. "We saw 2 supplys and 2 returns. Is this typical installation, or did the contractor go cheap?" Your answer is in the 1st sentence of this entire thread. "I have two split systems each 3 tons. Running off 6 vertical loops of 175 feet each." They in fact did what you suggested in another thread, 2 separate systems. "RE: Geothermal Question: split system requires two sep. wells? Posted by bob_brown (My Page) on Mon, Mar 19, 07 at 20:11 In my area, N. Texas, each hole is drilled for a ton of btu exchange. 250 ft per ton. If you have a 3-ton system, you would drill 3 holes. Different areas require more or less depth. Each system should be seperate in case of failure." If you carefully examine the photos provided in the above link, you will see 2 separate systems with 2 separate loop pumps. Parallel is the preferred way to go, in my opinion. One of the 1st things that has to be done is get a qualified installer in there with the proper flush cart to flush and verify flow rate  with the cart! This should Âreset the ground loops should there still be trapped air or debris. If there is still a problem, additional measures will have to be taken as deemed appropriate by the professional on site. As you correctly pointed out, reconfiguring to series would be inefficient and non-advisable at this point  even if additional boreholes were drilled! The solution lies in solving the problem(s) at hand. Tom may even have the additional advantage of having 2 separate systems on site where comparisons can be made. Bottom line Parallel is the way to go; BIG FLUSH CART REQUIRED! Flow velocity of 2ft/sec required at flush cart. Professional has to determine just how many GPM are required to achieve this flow rate. I suggest starting here if all else checks out. SR

After we had the freon added both my wife and I realized that it was never this cold after installation 2 years ago! It was June of 2008 and almost everyday it went to 2nd stage cooling (yellow light on tstat) for at least a couple of hours. Right now, after a week(after bringing it to full charge) it has never gone to 2nd stage (green light stays on). This leads me to believe that it was not fully/correctly charged at installation. It's all about installation-installation-installation! We are actually thinking about cutting future losses and having a new system installed next year from a reputable company that we know will be around for a long time-and most importantly a 10 year PARTS & LABOR warranty!!

If you are in a hot climate like Florida or Texas, would be a great time to add a heat recovery unit to get free hot water... http://www.trevormartin.com/about.asp http://www.turbotecproducts.com/EPhome.html http://www.p2pays.org/ref/11/10104.pdf