A heat pump allows you to heat your pool or spa economically . A high quality heat pump which uses a scroll compressor and a titanium coil are the most energy efficient and reliable units on the market today and will allow you toswim comfortably all year round here in Florida. Scroll compressors are actually 20% to 25% more efficient than conventional reciprocating compressorsand 50% to 60% quieter. These high efficient systems can actually save 80% over propane heaters and 50% to 60% over natural gas.