After doing tons of research, have decided on one of the Rheem heat pumps to heat my 25k gallon salt water pool. I'm trying to decide between the Rheem 6350ti and the 8350ti. The BTU difference on the two heater at 80,80,80 is 16,000 btu (133,000 vs 117,000). All of the reading that I've done says to size your heater to your pool, then buy one size bigger.
However running the numbers, to heat my pool 20 degrees, it will take the 6350 36 hours, whereas it will take the 8350 32 hours. If that is correct, I'm not sure I can justify the extra $500 on the 8350 because if I'm waiting 30+ hours to heat up, another 4 isn't going to matter.
Am I missing anything here? I'd prefer to stay away from any gas vs heat pump debates as I'm not considering gas for many reasons.
Thanks in advance!