As ATCO says,they do make heaters for the small dozers,I ran a JD 650H with a heater under the seat and it was a help but unless you have a cab it will be uncomfortable.
RonG. - I have been "manning up" for 30yrs , but I'm getting lazy. haha.
The fan on the heater really moves some air. I was moving it on our lot last winter *In Tennessee* with the heat going, and it felt pretty good.