My wife smokes outside on the patio. I've always felt sorry for her because she has to sit outside in the cold. I'm thinking of getting her a patio heater.
This one is propane and it's refillable, clean, and convenient. I think it's a good investment. It's not too big and cumbersome. Plus it's good for when we want to be outside in the spring air at night sipping beer or bbqing. :)