A friend of mine just got one and claims that - even with our current daytime temps in the 70s and lows of high 40s at night - he has his water at 86 degrees - says he can increase 3 degrees an hour. I'm astounded. I'm struggling to get the water to 79. Pretty sure he has propane. Mine's electric. Is propane much better? My Jandy AE-Ti is rated at 121k BTUs. Not sure what his is. I know I've never gotten anywhere near 3 degrees an hour UNLESS it's already a hot day and I want to go, say, from 85 to 88 or something like that. But once the colder weather comes in, it's a losing battle. For instance, if we stay with temps in the 70s the remainder of the month, I'll probably not see much above 80 degrees anymore. Drops too much at night. Curious as to what experience other here have with theirs....