Last winter while blowing snow in my NH T1110 with "original tractor cab" soft cab, I had a few issues with the glass (real glass) fogging and frosting up. I have thought about installing a universal heater kit to help with that problem. The company linked below is great to deal with, is local, and deals with cash so I can cut the cost down a bit. Anybody added a heater like this to a soft cab with a real windshield? I'm not looking to actually make it warm, but move warm enough air to defrost.
Universal heater kits
Universal heater kits