I am going to set up either a Woodstock or a Heathstone stove this summer. I live in Va and the winters are not that cold. I am doing away with the oil heat and replacing the central air with a Heat Pump. I want to run the stove 24/7 when it is cold. I am heating aprox 1600 sq feet, rancher, med insulations. How many cords of wood will I need. I know this will only be an estimate. Thanks.