Ok so...it’s time to add a pellet stove and this would be a first for me,opinions would be great to aid in the process.the main area I need to heat is about 450 sq.that’s not including the rooms off the main area,which I’m assuming will not be heated by the pellet stove (Am I wrong)?trying to judge what size unit to consider. It’s a 2by4 built home “drafty“...on a crawlspace. The whole house is 1000sq with the rooms.