I recently posted my experience with a soft side cab enclosure for my 450i, it certainly is better for plowing snow!! I also tried an item by a company called "Mr Heater" they make a variety of small propane heaters. Been thinking of adding a heater to my UTV but from what I have read, they can take awhile to get warm. I wanted something faster so my research led me to this small propane heater used for enclosed golf carts. It would normally sit in a cup holder on the dash of most golf carts, but of course I would need to make a secure base to hold this unit on the floor. It is fairly tall and skinny so it will tip easily so I made a base from a coffee can full of cement that I used for a portable canopy, it is heavy enough to keep it from tipping and keeps it in its place. This afternoon we received around 3-4" of snow so I had the opportunity to try this heater out. It is self lighting with a pizzo ignition system and puts out a non adjustable 4000 btu of heat. Best of all it runs 5 hrs plus on a 16.4 oz propane tank and it takes me about 45 min to clean my 300 ft drive and parking area so it will be fairly cheap to operate. With the Pacific Eagle enclosure I have installed it works great! Within 5-10 minutes it is warm enough to remove gloves and stocking hat and is so much more comfortable not having ice cold wind blowing in your face. Very pleased so far with this little heater, it does have an oxygen depletion safety and a tip shut off safety feature so with the small areas gapped open by the soft enclosure no worrys for getting gased out, in fact it burns extremely clean. I hate the smell of propane even while burning and I can smell nothing with this little heater going. If your looking for a little heat in your cab enclosure look into this little dynamo, mine works great.