Heat waves in the U.S. are breaking temperature records and stressing power grids, with a prolonged heat dome expected in many areas. As temperatures rise, searches for 'precooling' surged, a method that suggests lowering a home's temperature during off-peak hours to save energy. Experts view precooling, or super cooling, as effective under certain conditions, like well-maintained AC units and closed windows. However, running AC at low temperatures can be energy-intensive and release harmful HFCs. Efficiency decreases when frequently turning AC on and off, as it requires a lot of energy to cool down already warm spaces.
Running an air conditioner at 60 degrees is going to be pretty energy-intensive, and also produce a lot of HFCs, so there's serious costs associated.
Supercooling could be effective if you take good care of your air conditioning system and keep the windows and curtains closed.
Don't keep switching the AC on and off if you're trying to be energy-efficient. It's a lot of energy to get it started, to cool the room once it's already hot.
Air conditioning doesn't make the room cool. It just moves that hot air out.
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