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Originally Posted by retiredguy123
Neither of those things will help much to reduce your electricity cost. The best thing you can do is to add blown-in insulation to the attic space above the conditioned areas, especially if your existing insulation has settled to an inadequate thickness. Some people think adding insulation above unconditioned spaces, like the garage, will save energy, but it really doesn't help much, if at all.
Another idea is to buy a portable AC unit (floor standing) to use in the bedroom at night, so you can reduce the thermostat setting, assuming there is no need to cool the rest of the house.
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I've slept with a free standing AC unit. It was incredibly noisy.
I got ecobee smart sensors from Amazon a few months ago. They have made a big difference in temperature control in my house. I have been able to set the thermostat a degree or two over what it was before because I have better control of the temperature in individual rooms. The smart sensors act as thermostats and motion sensors for individual rooms or spaces. You can program your ecobee thermostat to pay attention to the specific space or spaces you want at different times of the day. At night, my thermostat only pays attention to the temperature in my bedroom and cools accordingly. If the smart sensors don't detect movement, they don't switch on the AC as quickly as if they do detect movement, so the AC doesn't cycle as often.