Our house is a 1600 s/f, single story cinder block on concrete slab with very little wall insulation (pine paneling, cotton batting) built in 1949. It has 9' celings and a somewhat open floor plan. We're in northern Michigan where the winters are long and cold. We're looking at a Country Stoves C310 wood burning insert w/blower for our primary heat source, it's rated for 1600-3000 s/f . Does this sound like overkill? Will we be opening the windows in January? Our local woodstove dealer (whom I trust) said "Better to have more heat available if you need it than not enough, you can always build smaller fires." Can we resonably expect to nearly eliminate our fuel oil furnace use with this insert? Previously I was burning 5-6 cord in the open fireplace to reduce our fuel oil bill by about 1/3rd. Will I also be using less wood through the heating season? While I do trust my dealer, I'm interested in all of your real life expert opinions on this too. Thanks in advance!