I wouldn't try to heat my pool in the winter, I guess I gave the wrong impression when I wrote, "throughout the year." We have what other people would call summer for about 9-10 months of the year so I used that as shorthand. I don't use my AC often because I set up a swamp cooler, but I have one. Our average temps are around 80 until the few summer months when we hit triple digits (it's 100 right now at 10am and in another hour or two it'll hit 105...and it's cooling down!).