We are in the process of tearing our deck down and replacing with a enclosed porch(13x14). It will be insulated top,bottom and sides. I am thinking of adding a stove to increase usage further into the cold season as adding ducting would be almost impossible without basement ceiling tearout. There are a few used P43 for sale (8-9 years old) and hear they are pretty solid units. This could also be a terrible idea and open to others. Thanks