Hi Guys...I'm back on the subject of heat pumps again! I was literally ready to purchase the Summit SUM5 110000BTU heat pump after alot of research. Just today, I noticed that my local Costco is starting to sell pool heat pumps again. They have the AquaPRO heat pumps...and I'm considering the AquaPRO PRO1100 AHNA/B. Does anyone have any experience with these heatpumps? I've heard that they are made by AquaCal, which i thought was one of the best names...but I don't know if this is true. How do these AquaPRO heat pumps compare to the Summit ones? The other thing I'm wondering is what does the "AHNA/B" stand for in the model name? When I try to research them online, the model name is 1100E. Is this a different unit...or just a different name from Costco? Thanks for the help in advance, as always!