Expanding on what bushart said, back home in Europe my house (which was rather large) was heated by firewood that sent heat through ducts. I think only a fan was used to move the heat better, and i'm not sure how the smoke was filtered out. If your interested, I can ask my dad for more details as I was real young when we left. Im sure you can find info regarding this online too. From what I can remember the fireplace or furnace if you want to call it was approx 4' wide, 8' long, 3-4' deep and you would jam it full of wood, and you wouldnt have to worry about reloading for up to 12hours. It would be the perfect set up for you, especially considering its a cottage and it is not your permanent residence. Besides, utilities aint cheap in the bush. Just a thought.