We live in Illinois which gets a lot of cool weather even in the summer, so my pool water gets really cold. We are thinking about getting a heater however we are not sure if it's worth the cost or not. From what I found we like the Raypak heaters, but they are about 3k plus installation about 1k and that does not include the cost to run it. Is anyone on here in the same state and have any Pro's and Con's to adding a heater? Will heaters survive our horrible winters? Anyone have experience with Raypak? Any suggestions welcomed