I wonder if the data is coming from the average user, and there are actually
ways to use a set-back, to save energy?
I'm picturing a single guy (or working couple), that uses a hotair system,
that provides almost instant warm air heating.
(Maybe gas, electric or a mini-split).
If he isn't worried about heating up his whole dwelling,
and just wants some warm air blowing around when he gets home from work..
It seems like a set-back might work ..
That type of use Compares to an on-demand hot water heater for a sink.
No power is used overnight, or while the owner is away at work.
Only used when needed.