Dear Mr. Ruben:
I will send you a long letter personally, telling you about all my favorites for Orlando, as it is too much for this forum. Since you have such a big pool and you have a screen enclosure (limited sun) we like to go with heaters above 100,000 BTU's. Some people in your area go all year and some go March through November. You are on the right track by looking at a heat pump as the cost of operation is so low compared to other technologies. Also the higher the efficiency of the heat pump the lower the electric bill. Look at companies that have been in the heat pump business for many years and have a history of good customer service. I can help you find the good companies that care about their customers.
360 568 3718