noe-place wrote:
Dash unit won't cool beyond the pilot/co-pilot area. DW runs the genny and roof AC when things get too hot. Let your wallet make the decision for you.
The dash AC will cool the complete rig if you open a roof vent or some thing near the rear of the rig so the air can go thru. It is air coming in and if it has no place to go it will stay right there and do only the cab area. If you have roof vent covers while going down the road with the vent open some it will form a vacuum amd pull the air from the cab AC thru the complete rig. Our complete rig stays cool even in 114 degree temps. Roof AC will not do as well.
