We have 2 stoves in our house. So I am very familiar with the stoves and the pellet types. A lot of horse barns here in Colorado have pellet stoves, it is very comman, and a lot cleaner too, we have nothing to catch fire inside the barn, all our bedding and hay is outside, our grain is in air tight bins. we have rubber mats in the stalls with a very small pile of bedding. But pellet stoves are not open for flames to come out, the pellet burns and there is very little ash (that is not hot), so I am not worried, but when you have the pipe installed you need to worry about the pipe being sealed, where a little smoke can come out, but you have to worry about that with your house. So if your house isn't smoky, then the barn will not be either. I would never put a wood stove in a barn, because they can get too hot and they do throw hot ash out, the same with a gas stove, the tank could explode, so I will stay clear of them, but the pellet stove seems the best way to go. Guess if you are not knowledgable of heating a barn, you get scared and I understand, but it took 3 years of research and visiting barns in the high country to finally get one. I think the boys will like it a lot, instead of freezing to death. Like I said, my goal is to keep the barn around 40 or just above freezing during the nights. I am not creating a 70 degree barn, horses favorite temp is around 50. And the barn is completely insulated and finished inside, so nothing to catch fire. I am not putting this is an old rickety wood barn, that would be stupid.