Air-conditioners are in a way dehumidifiers, so that makes sense
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AspieEgg@lemmy.blahaj.zone 16 hours ago
When I press the defrost button in my car, it turns both the heat and AC on at the same time. I assume this is to remove water from the air with the AC, then warm up the air increasing its capacity to hold water with the heat.
jnod4@lemmy.ca 16 hours ago
nova@lemmy.wtf 12 hours ago
in a lot of newer cars they can actually use the A/C to heat and cool the car, rather than using excess engine heat or an electric heater which is especially helpful when it’s cold and you’ve only just started the engine!
boonhet@sopuli.xyz 4 hours ago
I assume you mean EVs with heat pumps? I don’t know of any ICE vehicles that do this, seems inefficient to waste mechanical or electrical energy when you have perfectly good waste heat to use upon reaching operating temperature (though you may need to use an aux heater before reaching that, particularly on diesels)
takeda@lemmy.dbzer0.com 9 hours ago
Fun fact (well, I suspect you know this already, but some didn’t, I had discussion with someone arguing with me that this is not true):
AC and a heat pump are basically the same thing, AC is just pumping the heat outside instead of inside.
Also when you say modern cars I am assuming you might be talking about EVs. Using a heat pump requires less energy than using resistive heating so it could be energy saving measure.
ICE cars on the other hand can get the heat from engine “for free” (not really, but since the heat will be produced anyway whether you use it or not, so why not use it?) so a heat pump might make a bit less sense in them.
MissingGhost@lemmy.ml 4 hours ago
My car is a diesel so it takes a long time to warm up in the winter. They added an electric auxiliary heater to compensate. The air is really hot within seconds.
AspieEgg@lemmy.blahaj.zone 4 hours ago
My car is an EV, so it definitely does this because there’s no excessive engine heat to use.
marretics@discuss.tchncs.de 10 hours ago
Your assumption is correct Also your car automatically calculates the condensation point and keeps the temperature and air moisture low enough not to cause any fogging on your windshield. Source: I’ve been programming AC unit controls for cars for the last 10 years
weps@lemmy.world 2 hours ago
thank you for your service
ayyy@sh.itjust.works 2 hours ago
How upset do you get when your buddy disables auto and proceeds to slam back and forth between full heat and full ac while claiming their shitty dial dj set is somehow waaaaay better than the computer?