I have read articles stating that scroll compressors are more efficient than piston models and that if you want to save electricity, a scroll model is the way to go. Then in the next article I read where scroll compressors have at least a 5% less heat output than a same size piston model. If this is the case, I see the scroll running longer for the same amount of temperature rise in my pool, which I would think equates to a higher electric bill.......is this the real story??? Also hear that the piston is way more efficient as the outside ambient air temperature gets higher. True or false and at what air temperature does that become a reality?? I like the scroll for a number of reasons, less parts, better compression, etc., etc., but I also want the most heat, in the least amount of time, for the least amount of electricity.