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11 comments

[–] xyzzy 2 points (+2|-0)

It gets cheaper the lower temperature difference between inside and outside is. So turning them off is cheaper.

So the ramp up/down energy usage is less than, say, 8 hours of maintaining temp then?

[–] xyzzy 2 points (+2|-0)

Generally yes. There might be exceptions with A/C units which are less efficient when under full load, but they're usually inefficient anyway and the savings not having them running are higher.

Thank you. It's a question I've had for years and no one ever really had an answer.