When driving, what sucks more gas? A/C or heat?

[Broncho]

Ok, I thought that maybe the case but since it was totaled in a wreck earlier this year I never got the chance to look around under the hood much. Thanks for the info.

 

[Zenmervolt]

I think if it's especially bad, recirc will help.

Recirculate will make the fogging worse. You always want fresh air. The reason is that the vheicle is basically sealed, and if you have the ventillation on recirc, you are recycling the air that is already in the cabin. Since humans expel a lot of moisture when they breathe, the air will just keep getting more and more humid if you have it set on recirculate. This is especially noticed in the winter because fresh winter air is very dry already, the reason that the air inside the car is humid is because of your breath. If you keep the dry outside air from coming in, then you are just making it more humid inside the car.

ZV

 

[BoberFett]

I drove an 89 Subaru GL about 8 years ago. Worst piece of crap I've ever driven. The A/C button was actually a turbo button in disguise. When I had the A/C on 0-60 was about 20 sec. Hit that turbo button and it snapped my head back.

Well, not really, but it was a lot faster.

 

Recirculate will make the fogging worse. You always want fresh air. The reason is that the vheicle is basically sealed, and if you have the ventillation on recirc, you are recycling the air that is already in the cabin. Since humans expel a lot of moisture when they breathe, the air will just keep getting more and more humid if you have it set on recirculate. This is especially noticed in the winter because fresh winter air is very dry already, the reason that the air inside the car is humid is because of your breath. If you keep the dry outside air from coming in, then you are just making it more humid inside the car.

This is assuming that it is not raining out or the fresh air vents are not plugged up with snow

 

[Jzero]

Originally posted by: Zenmervolt

I think if it's especially bad, recirc will help.

Recirculate will make the fogging worse. You always want fresh air. The reason is that the vheicle is basically sealed, and if you have the ventillation on recirc, you are recycling the air that is already in the cabin. Since humans expel a lot of moisture when they breathe, the air will just keep getting more and more humid if you have it set on recirculate. This is especially noticed in the winter because fresh winter air is very dry already, the reason that the air inside the car is humid is because of your breath. If you keep the dry outside air from coming in, then you are just making it more humid inside the car.

ZV

If you have the A/C on and are recirculating the air, then the only source of moisture coming into the car would be from people preathing and sweating and whatnot, so wouldn't it then be easier for the A/C to "dry" the air?