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David Boehmer is a State Certified Solar Water Heating Contractor working with Florida Solar Energy Systems in Sanford, the area’s leader in terms of number of heated pool systems installed. Here, in an article prepared for House & Home, he discusses the choices and opportunities to increase the water temperature of your pool during these cooler months ahead, and explores the merits of gas, electricity, heat pumps and solar systems. Although Central Florida has warm and sunny days almost all year, cool nights during the springs and fall months generally drive the temperature of an un- heated screened swimming pool down to 65-70 degrees Fahrenheit, which is too cold for most folks. Screened pools drop to the low sixties during the winter months, so low that your pool doesn’t have enough time to get back even to the mid-seventies during the beautiful Florida days we often enjoy in between winter cold fronts. And many dual income couples who have to swim during the evening can’t even use their pool comfortably during the summer. Sound familiar? Most swimming pool heat loss occurs at the surface. The least expensive way to maintain a warmer pool is by keeping a cover on the pool during the nighttime hours, when surface evaporation would otherwise cool the pool down. The cover stops this nighttime evaporative would otherwise cool the pool down. The cover stops this nighttime evaporative heat loss and enables the pool to stay at a higher temperature. Pool covers are not difficult to use and can easily add two months to your comfortable swim season. Pool covers cost between $85 and $150 for most residential pools. In fact, all of the other pool heating methods discussed in this article should only he used in conjunction with a pool cover. Not to do so would be like running your house air conditioner during August with the doors and windows open. The system will still work, but the operating cost will be...

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