Do you have an A/C, do you run it?
If so, chances are you need your heat source running.
As to some things said if your home stays in the high 70s to 80s no other heat would be required. There are plenty of keepers with large collections that do nothing more than offer proper ambient temps.
I have a heated snake run. Rarely do any of my snakes use their hotspot. I'm sure if I turned them off they wouldn't miss a beat. My room is kept at 77 with peaks of 80-82.