This will be my first year using a new add-on wood/coal furnace. I was wondering how much wood (roughly) I can expect to use during the winter. I live in Ohio, I have an 1800 sq. ft. home that is well insulated. I plan on using the stove as much as possible to heat the house. I'm just looking for a rough idea so I know how much wood I'll need. I have about 4 cords stacked now.