Dear Mr. Scannella:
Thank you for writing to me. You ask great questions. I have used waste air conditioning heat to heat pools before. If you are, or know a refrigeration mechanic it isn't that hard. There are a few problems that most of the time make it impractical though. The problem is that on the days that you need heating in the pool the most you need cooling in the house the least. Also it will void your air conditioners warranty if it is new or kind of new. Some A/C's have a 10 year warranties on the compressors so "new" is relative. If you do install a heat exchanger or "condenser" it can make the air condition work better if it is an old inefficient one by helping the unit reject the house heat. If the A/C is less than 5 years old then it probably won't help the efficiency much. What I really like to do is to put a heat recovery unit on each air conditioner to heat the domestic hot water. Then no matter what time of year it is or what the outside temperature is you always need hot water in the house. So you might save $30.00 to $50.00 a month on your electric bill if you have electric element water heating while the air conditioner is being run. The heat recovery units run about $600.00 or so plus the cost to hook it up. For pool I like dedicated heat pumps. It also helps mechanics who are too wimpy to work on anything that doesn't look like it came from the factory. If you are stubborn and still maybe want more detailed information about the mechanics of making your a/c heat the pool please give me a call.
1 800 741 9956