Thanks for the responses. I completely forgot about the re-circ setting and just had it on interior circulation. Huge help. I also parked my truck downtown where I work in the underground parking to melt all the snow off it. Helped clean out all the vents which had snow jammed in there. Somehow in our recent giant dump of snow, snow managed to get packed in places I wouldn't believe... How did that happen... hehe. Now the biggest issue seems to be getting this baby to start in the -30C temps. Plug-ins mandatory

1991 Pajero, SWB, 2.5L diesel, 5sp, 33x10.5 BFG AT's - Hopefully they wear out soon!!
1997 Chevy 1/2 ton Z71 - couple of mods, nothing too fancy
(Now reserved for camper & snowmobile hauling or while the Pajero is getting upgrades)