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PSA: if your power is metered based on the total use on the grid, it's always cheaper to crank your AC at night and coast on residual coldness during the day, if your house's insulation is good enough. this is an especially good move if your area is prone to rolling blackouts during heat waves! smart thermostats can be programmed to do this, but you can also just do it manually.

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this is also essentially the best way to cool your house if your AC is broken, or you're in a heat wave in a place that traditionally doesn't need AC. windows open at night, close them and the shades as soon as you wake up. use your house as a giant cold sink. got me through several AC-less heat waves in upstate NY.

@jacethechicken this is good advice. I think Technology Connections just did a video on the subject too.

@jacethechicken there are also conventional thermostats sufficiently programmable to handle this at a significantly lower price point than if you look up "smart thermostats." Honeywell is a good brand for this in the US.

@naga Eeh, for their traditional thermostats they're fine but their programmable ones... they start freaking out after a year or two, and one decided a -10Β°c day was a good time to internally short and turn on the air conditioner full blast. I don't trust Honeywell anymore.

@jacethechicken

@jacethechicken where do houses have insulation this good though? my city is all AC window units and very old buildings

@jacethechicken Also check with your utility. Mine has a program where you can trade the usual 7Β’/kWh rate for time of day savings. So from May to October, our rates are something like 15Β’/kWh Mon-Fri 13:00-19:00 except public holidays. And outside those hours, it's like 1.5Β’ or 2Β’.

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