cab heater heat source ??

[Harry]

I just came in from 7 degree weather after 1.5 hours using the 446 with cab and caster. My hands are the only part of me that ever gets cold. I had about two feet of snow that accumulated over the two weeks we were gone. Very light snow on top of heavy on the bottom with some ice. The caster handled it perfectly but I did have to back up and ram the pile a few times by the road where the plow left a mess.