In December, we had FPL come out and conduct a duct test on our air conditioning system. We found out that our air conditioning was extremely inefficient and that we had some major duct leaks. We had our a/c replaced and our FPL bill went from over $300 per month to just under $200. We figure the savings on our electric bill will pay for the a/c in about a year and a half. We just had our duct work replaced and the house is so much cooler. I have a feeling our bill is going to be even lower in the next couple of months.