Understood. The stove/fireplace would be a backup energy source and a source of ambiance. In the place we are currently renting we have NG fireplace. No way in hell that would be in my actual home...Outside air on some stoves is sealed and on others it's more open. The main issue you may find with wood heat in a well-insulated home is that it can be too much heat. Do the heat loss calcs carefully and then factor in all the inputs from lighting, refrigeration, bodies, etc. You might be surprised how little heat it takes to maintain a comfortable 72º when it's 20º outside.