Usually we have pretty mild winters here in the midwest, So my shop at home is heated with a big kerosene salamander,thing sounds like a fighter jet when its running and I hate the smell,but you can fire that thing up,point it at what your working on and in about 15 to 20 minutes ya can work in a t shirt on the coldest days,when it starts gettin chilly again fire her back up for a short time and your good ta go for another couple hours,
A buddy offered me a nice gas furnace just last week but I turned him down,don't want to take up any extra space in there and dont want to hafta run a gas line from the house.....