noe-place wrote:
Hey that's interesting. Do you have your AC set on re-circulate position when doing this?
If you set your AC on re-circulate it does not bring in more air so air inside moves only in the cab area.
If you bring in out side air it will move thru the rig. In a lot of ways air acts a lot like water. If you keep adding air to the inside it flows thru. That keeps the whole rig warm or cool. Hard part is trying to get people to open a rear vent in cool or hot weather because they think the out side air will come in but if you keep warm or cool air coming in thru the cab heater/AC it will only exit the rig. And it will exit at the rear so goes thru the rig. Faster you run the heater/AC fan the faster it heats/Cools the rig. Most Cab AC's are some where around 50,000 btu. Most roof ACs are about 1300-1500 btu.
