[awang44]

I don't think it will burn more gas since the air in the cabin is already cooler then outside, in summer when you need the air con on. The compressor doesn't have to work as hard as cooling down the hot air from out side. I guess the only negative is when you have it on for too long, oxygen is consumed by passengers then you might feel a bit discomfort. but again I don't think Focus is that air tight. It should be ok to keep it on all the time.


So... anyone had idea how it works?