New pool owner and looking for recommendations from the experts on how many BTU's I need for my 21' AGP (10,400gal). Going to pick up a heat pump over the winter or spring but not sure if a 50k BTU will do or if i need a 100k BTU. looking to run the pool from May to September. Ill list the average temps below for my location and hopefully some in the same area or someone with the same average temps can chime in. The price difference between a 50k and 100k is about $1000 CAD. So if I can get away with a 50K BTU and save the $1000, that would be great. Thanks in advance for any help.
Average temps for each month:
May 54F ( Want to open pull mid May or so)
September 58F (Close pool mid to late Sept)