Daily, all year roun,for a short time.

Let me introduce you to Stoßlüften.

Still too much! I haven't migrated everything to Linux yet (poor me).

Dane here. I open all windows for five minutes two times a day, also in the winter.

Southern US, windows are only open in winter, basically whenever it's comfortable outside. Never in the summer. The A/C runs basically 24hrs a day during the hottest 2 months of the year.

Windows on the car are basically left cracked for the opposite time. Rain deflector are installed to allow for this without rain getting in.

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Spring: Never, my partner is allergic to tree pollen released during the spring, nor does the indoor temperature warrant opening the windows

Summer: Sometimes in late summer - I am allergic to grass pollen highly prevalent in early summer. Once they clear, I open the windows when it's warmer inside than outside, to cool down my apartment slightly

Autumn: Rarely. The temperature usually does not warrant opening the windows

Winter: Never. It's far too cold to let heat intentionally escape

How I avoid suffocation: my apartment is well-ventilated, this is not an issue whatsoever

When we taste the air is a bit a stale, we open the all the windows and sliding doors to exchange the air during all seasons.

I basically never open my windows. This winter, I don’t think I opened them at all except maybe during a big cleaning day.

In Japan, ventilation is required by law, and most modern houses are equipped with a 24-hour ventilation system. Because of that, we don’t really need to open the windows to get fresh air — the system continuously circulates air for us.

At the same time, it doesn’t make the house noticeably colder in winter or hotter in summer. The air also goes through filters, which is especially nice during pollen season.

So I don’t really feel suffocated even with the windows closed, since the air is still being exchanged constantly.

I open the windows during winter even when it's like -30c, at some point the air gets stale and circulation is needed. The stuffy air also makes my headspace feel weird, like something is irritating me but I can't tell what it is.

Then at some point I open the windows, I also run a huge fan to circulate air around.

I never open Windows regardless of season.

I like the fresh scent of Mint in my house instead.

Almost never. I lived in a bad neighborhood for too long, so I doubt that habit will change.

German here: yes. 24/7

LÜFTEN

Northern Spain here, they remain closed all winter except the few times I open them to ventilate. Next month I'll probably start opening them during the day and at some point in May or June they'll remain open until the end of September or so.

I have sensors that let me know when the outdoor temperature and humidity are both better than indoors so I can open the windows. Typically that’s an hour or two a day in the winter when the weather is nice, and most of the day in the summer.

My bdroom windows are open almost the time, except when it's 30+ degrees in summer (to keep the heat out, we close it during the day) or below and -5 in the winter (to keep the heat in, we close it during the night).

I live in the Pacific Northwest, which means temperatures don't fluctuate too much into extremes.

I personally like having the window cracked at night in the winter. I like to have fresh air, even if it's cold. I feel sick if a room feels too stuffy.

Spring, summer, and fall the windows are definitely open at least at night if not during a larger part of the day. If it's ~15-25C outside, I'll usually have at least one window open. More likely two in the 20s. I just don't tolerate heat well, so I will close my windows during the heat of the day when it approaches 30s.

Otherwise they're only closed if outside is gross (smoke, people talking, hazy) or if I want total silence.

Northern part of a Nordic country: never during winter; never closed during summer, unless raining.

As soon as the air feels stale you gotta turn off your heating and open all windows for like 5-10 mins in the cold seasons. Air is bad at carrying heat anyway, if you close your windows it'll get warm again quickly.

German "Stoßlüften"

The four days out of the year that it's comfortable weather in Texas, I'll open the window. But only with the screen still on, or mosquitoes get in.

Edit: "comfortable" = between 75-80°F

https://www.youtube.com/shorts/HNq-De_wCx0

In the winter, Stoßlüften, especially to get moisture out in winter, to reduce and clear out condensed water on windows and prevent mold. I guess bathroom after a shower more than other rooms either way. In the summer, full night, none during the day.

Sometimes not for a few days, sometimes multiple times a day, sometimes open all day. Depends on the season and a few other things.

I always have a window cracked open in my room, but SoCal coastal weather is best in the world year round. There are few locations with deep water upwelling AND onshore flow atmospheric patterns. Of those, there is only one other location, in Peru, where it is also a temperate desert.

Your parents are right in terms of energy waste, im sorry to say.

I'm quite similar though and air about five times a day but with a timer so that the air gets circulated completely without cooling out the house itself.

The breathing struggle is most likely a mix of dust sensitivity and psychology. For me an air cleaner made a huge difference in my comfort level.

I'd you want to go the scientific approach get a CO2 monitor (the most important element for brain performance when talking about home air) and a PM2.5 sensor for dust levels.

At least once a day. Really depends on the temperature, though. On hot days I open it in the morning to let cool air in, on cold days I avoid leaving it open and only open it temporarily when the air gets noticeably stale, leaving the room when I do so. Inbetween I usually leave it open the entire day.

Though, I only open it fully in the mornings of hot days. Other times I always leave it tilted only.

I hate Windows

Windows? not often, but I leave my wooden door open, so the kitties can look out and see the birds and stuff.

I rarely ever open windows unless someone asks me to. I get a lot of complaints during the summer of how hot it is indoors, but I adore the heat.

Pretty temperate here.

Doors and windows open at least some of the day all year round.

I love sleeping with the windows open in the summer.

My building is on an old chiller system, so my AC is off ~5 months out of the year. My windows are open the entire time, and I usually have fans set up too to try and keep things cool.

When my AC is on, absolutely never. It is hot here like 7 months out of the year. 

During winter, having them open for any significant time would risk plumbing freezing. During summer, it's usually a matter of opening them at night so the coolness lasts through the day.

Only close them if it's raining

Honestly. I used to always keep my window open* over the night. This winter was the first I have regularly not opened my window and just opened it for a bit during the day (yes stoßlüften), which I of course did before as well, since I'm German 😅

* when I say "open" I mean my window would usually be tilted open ("gekippt") not fully opened wide

I try to keep windows open as much as possible. I also struggle with breathing when they are closed. During winter tho it’s a struggle. My mom gets furious when I turn the radiator on and set it to anything above level 2 and she never ups hers above level 1. So I’m suffocating and freezing. Sometimes I gotta turn the fan on for a half hour just to get some relief.

Honestly I’ve given up on trying to save on heating during the winter. Even with everything closed my house is drafty as fuck. I’ve got one whole room on the ground floor that was an addition built later and no one bothered to run ventilation into it, so it needs a space heater. Yeah it gets stuffy but I’d rather be warm.

Spring and summer are a different story. I love spring and summer air and I open everything.

I've lived in my current home six years and I'm not even sure the windows are capable of opening. It's wild to me that some people believe they're gonna run out of oxygen if they don't open a window 

Where I live, there's usually 3-4 months out of the year that it's better to open the windows to let the air in than to use central air. Cheaper as well. In the winter we usually get a day or two where it's warm enough to open up to let air circulate. But swamp ass summer and deep winter here suck eggs to be opening the windows.

I got a Technoline WL1030 meter for my room and whenever it reaches 1500 ppm CO2 I open the window until its back down below about 600-700, then I close it to not waste more heat than necessary

Edit: To give some more context, my room is 14 m^2 and about 2.50m high so roughly 35 m^3 of air minus some occupied by furniture call it 30 m^3 maybe. It is a modern house with good insulation and energy retention rating (built to the "Minergie" standard we have here in Switzerland), but without forced air, so not much air is exchanged when the windows are closed. With this I end up roughly having to exchange the air every three hours or so.

Live in a hot weather climate here in Tucson; windows are never open because of the effort required to open them shut them. The AC does its job just fine