I don't! My windows are open all year here in Chicago.

23c (73.5f) all year round. We have two nearly hairless cats, they do not like cold weather.

18° in winter. 24° in summer.

However I would only put the heater or aircon on somewhere between 40-60 days a year and only for a couple hours. And often it's just to take the chill out of the house or cool the bedroom before bed. I have a modern well insulated house which is a rarity in Melbourne or Australia in general, houses/apartments are built like shit here.

73 day, 70 night.

I prefer it a little cooler, but my apartment isn't insulated for shit so anything less and the ac basically never turns off.

Hasn't turned off a whole lot with heat waves lately.

WTF 70s? I'd be roasting.

69 is usually what I keep it at in my car.

During AC season, 71 during the day, 68 at night. Geothermal FTW.

65F/19C. Fans in summer, sweaters in winter.

Only have heating, no AC. So 19C over the day and 16 at night for the winter

70F (21C) during the summer time, and usually its off during the winter (we just have the windows open, and might briefly use a space heater if its really really cold).

In fall and spring it just heavily depends on the day and how it feels.

In the winter, 68, 69 if I'm particularly cold, In the summer I don't turn on the AC unless I'm absolutely dying, and then it only goes to 77. I'm a lizard, I love the heat, but I also hate paying high gas bills.

21 in summer, though it hardly ever kicks in with the awesome isolation we have.

23 in winter, cause I like it toasty.

Summer - cool to 76 around the house. 68 for sleeping.

Winter - warm to 70 around the house. 65 for sleeping, with a heavier comforter.

74F during the day, 72F at bed time.

74 in the summer and 68 in the winter. Before I met my wife I would keep it at 60 in the winter but she wasn't having it lol (heating oil is expensive). I didn't have central air so my bedroom (window unit) I'd keep at 68-70.

77F normally

I live in a campervan and so have no temperature control in the traditional sense. Closest thing would be the Maxxfan with thermostatic fan control and it's set to 68F. As long as external temps are lower than internal temps it does a reasonable job.

I program mine to run less when we're not home. On top of that I set a "super cool" routine on weekends when it's going to be hot outside.

You see, the a/c is most efficient when it's cooler already. So in the last hour of darkness in the summer I set it to run down to 68 or so. Then it doesn't have to run as long to do that. Then it doesn't have to run again for several hours as the temperature is set back to 72.

I also clean the outside coils annually and put up a sun sail so that the outside unit is shaded all day. This has helped save a lot of money along with the thermostat programming.

I usually do 19C in the winter, and 24C in the summer, my parents do 22C (72F?) year around

72 during the day and 68 at night.

The simplified version

Summer: Day: 76°F (24°C), Night: 73°F (22°C)

Winter: Day: 78°F (25°C), Night: 73°F (22°C)

Chiming in to say comparing thermostat settings between houses is comparing apples to oranges. Your AC is only "on" or "off," changing the thermostat setting only changes how much time it's on vs how much time it's off.

On a 100° day, the HVAC in a well-insulated house with double paned windows and solid weatherization is going to be able to maintain 77° with little effort, where a poorly insulated, leaky house may struggle to even reach 77° with the HVAC running continuously. These two houses may have their thermostats set the same but their internal temperatures and energy usage will be different, maybe even radically different

Summer time - 75F during the day, 72F at night. Winter time - 68F during the day, 62F at night.

I live in the Midwest US

76 in the summer and 68 in the winter

19C in the winter, around 28C in the summer. It helps that in the winter I just keep a space heater near me (I get cold and turn it on at what a thermometer in my room calls 19C).

70F set it and forget about it until i woke up freezing at the middle of a night.

Our heater is set to 60F in the winter.

If i want it warmer than that (usually) it's up to me to keep the wood stove fired and fed!

I do 76F in the summer for AC and 68F in the winter for heating. Try to use minimal heating and air and still maintain a comfortable range. Can get expensive if working the system too hard. If it wasn't a matter of cost I'd leave it on 72F all the time.

Evaporative coolers are great if you live where you can use one, much cheaper to run and they can work pretty good as long as humidity isn't too high. I had one in a house I lived in before along with a regular AC system. It was a good to have and saved a lot on the electric bill. If it was dry enough out the AC unit was not needed.

Haven't used a heat pump before and don't know much about them. If they work as well and cost less to operate that would be a good option, but I wouldn't use one if it's a downgrade in performance. Rather pay for the comfort.

In the summer? I have no AC at my house but it doesn't usually go above 77 - 80 on it's own. It's in a unique part of the city where we're surrounded by the woods and trees which provide a lot of shade and cool the air. Also the house is built into the side of a mountain and surrounded by massive retaining walls, so the first floor is basically a story underground. Our bedroom is also on the first floor, so I don't really go upstairs except to do laundry.

In the winter, usually about 64 - 67. It goes down to 60 during the day on a schedule or whatever.

I have an evaporative cooler it really doesn't have temperature control. It is kind of whatever the outside temperature is -20f degrees with 75% humidity.

I'd like to have it at 71f, but it's not going to happen. After a $$$ AC repair i can now get down to 74 instead of 78. Usually around 68-70 in the winter. How come it's always so hot indoors when i go to places with a cold climate?

My folks keep it at 79°F during the day and 72°F at night.