My husband and I have not agreed on what type and size of heat pump to install on our pool built last year. We live in Vail, AZ and the pool only receives morning to 3pm sun, then it is shaded as the sun hits the front of our house. I was cold last summer swimming and would really like it to be warmer and extend the season to at least March thru October. Temps in March can be in the 40's at night and up to 90 in day. I did get a solar cover. The builder plumbed the equipment to receive a heat pump and also a solar panel. The size pool is partially free form. my measurements 24 max size including the large 1 ft lagoonx38. My husband measures 18x34 (swimming area) and the depth goes from 3.5 to 7ft, but my husband says 6 ft. The builder said 25,000 gallons, but my husband says more like 20,000 gallons. I do think it is not "really" 25,000 either, but maybe 23,000? I was looking at an icebreaker unit BTU150,000 gulfstream, but he says a 90,000 BTU unit is more like what we need. He says I am overdoing it, but I am afraid to under do it. Do we need an icebreaker in AZ? I really don't see us having the cool the pool off during use. We did have to living in Phoenix. We also have 3 bubblers, 4 deck jets and 3 sheer descents that cool it off just fine. It's just too chilly for me to enjoy. I am afraid to pull the trigger on this part. We had a heat pump in Pa and loved it. I shy away from gas even though the line needed is within feet of the meter. I heard that operational cost is extreme and my husband would flip over $$$ monthly bills vs spending a little more on a heat pump in the beginning. I got a quote once on a solar panel and they wanted 6K which seemed like a lot for what it does and how long it works in a season. Would like a little more control over it. Any advice or comments are welcome. positive or negative. Thank you!