Is it more economical to run the A/C only during off-peak hours?
I was thinking of setting the thermostat like this:
Off-peak 7PM-7AM: 22-24°C
Mid-peak 7AM-11AM: 28°C, A/C should be off anyways due to cooler mornings
On-peak 11AM-5PM: 35°C or off completely but windows closed, not home
Then wait after 7PM to bring the house back down to 22-24°C, letting the air conditioning running full blast to remove excess heat for a couple of hours. What matters to me is that the house is cool before I sleep.
There will be energy savings because of the cheaper rate and the fact it is easier to remove heat when it's cooler outside, but I'm wondering by how much, compared to before which was set to constant 24°C when home and 28°C when not home.
Also wondering if there is savings running the A/C full blast one hour before mid-peak starts, to something like 15°C, then have it off completely until 7PM.
Does anyone do this? Appreciate your thoughts.