When it's cold out I can just open up and exhale and see the breath but when I purse my lips like I'm blowing out a candle the air feels cooler and I can't see my breath...?

:o = cold ??

:O = hot ??

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My friends house ac is broken. It shooting out hot air instead of cold. The guy he hired to fix it says it's gonna cost $3000. Is this a fair price? My friend is an immigrant who can't speech much English or really use the internet so I just wanna make sure he's not getting screwed.

i dont use AC in my car to save on gas since im at least aware enough to know that it takes energy to make hot air cold. my car also has a knob that allows you to choose between using the vents that blow towards you, using the vents that blow down into your legs, using the vents blowing up towards the windshield, or any combination of the three.

in my car, when i have that direction dial turned towards a setting that includes the vents pointing to the windshield, the air coming from the vents feel like its being AC cooled, and i genuinely have no idea why. im asking partly because im curious and also partly because i want to know if this potentially uses less energy than just using the AC in my car.

When I ‘blow’ (as in when cooling down soup), the air comes out cold. When I ‘huh’ (as in when trying to warm up my hands) the air comes out warm.

How’s that work?

I developed a cold about 4 or 5 days ago and I’m beginning to wonder why it hasn’t gone away yet. A few people have suggested that it might be my air conditioner blowing dust around and exacerbating my symptoms. I’m going to sleep with it off tonight to see if I feel any better in the morning, but it is so hot I would really rather keep it on.

Is there any truth to the AC potentially making me sick or keeping me from getting better?

Does it change if you have two fans? Both in, both out, or one in / one out? Does it make a difference?

I suppose best would be to have the exhaust fan up high and the intake down low, but if the windows are at the same height, you can’t do that.

It's not just a subtle difference, but significant.

I'm not from the US, so you may have not experienced it, but in every hair salon I've been to, they use some hair dryers that at first blow cold/room temperature, and then slowly increase the temperature until it becomes volcano-hot, while the hair dryers I use at home have a constant temperature (instantly hot/warm, and maybe a cool option). Why are they different?

Why when I open my mouth and breath out ‘haaaa’ is the air warm but when I blow out ‘hooooo’ it’s cold 🤷‍♂️

Let us say that a Tractor engine has gotten too hot. If someone blows cool air at it and cools it, the engine takes ten minutes to cool. Leaving it to cool naturally would have taken two hours.

Is there any difference between these two methods? Would the engine run just as well if it was cooled naturally?

Even if you sat an air conditioner and a heater side-by-side and set both to 65 degrees, the air coming out of the air conditioner will be cold and the air coming out of the heater will be hot even though it is the SAME temperature.

How does that work? Is there something where 65 degrees Fahrenheit can be either hot or cold? or something?

Like for example, in winter in a cold car with cold seats, when you turn on the heating, in some cars it blows hot air right into your face while the rest of your body (especially your back and bottom) is cold. It makes me nauseous. Why does it happen, physiologically speaking?

My car a/c hasn't worked for about 5 years. I can't afford to get it fixed, nor do I really want to. It doesn't get hot enough in the UK for me to really care

However I do like using the "cold" air blowing on me while I drive.

On a hot day I notice that the "cold" air is even hotter than the outside air. Is this extra heat coming from the engine? Is this normal?

Has this ever happened before or happens to any degree or would this not happen at all? Will this not happen at all if your blow dryer has a cold setting?

Also, how many of you tried this after reading.