Wall timers for my air conditioners. I have window units in my bedroom and living room. I'm on the top floor of my building, right under a black tar roof. In th

Wall timers for my air conditioners. I have window units in my bedroom and living room. I'm on the top floor of my building, right under a black tar roof. In the summer my place would sometimes get so hot that I'd have to leave both air conditioners on all day just so the place was livable when I got home. Not cool, just livable. My asthma reacts badly to heat, and I'm addicted to breathing. Then I bought a couple of timers. They're like the ones people use to turn lamps off and on, only these are heavy duty, and can handle the load of an air conditioner. Now the AC turns on in the middle of the afternoon, and things are fine by the time I get home. The living room unit turns off at midnight, so I won't accidentally run it all night if I drift off in my bedroom. The bedroom unit shuts off at 8:30 AM, so I don't accidentally leave it running all day. Not high-tech, but useful.