I have a 3 bay garage 30 x 40 that I am wondering if I could heat with a small wood burning stove. Unfortunately, I have to leave the doors open so it is like one wall is missing. I am in SC and it is in the 20s right now but we don't have many days that get this cold. I am trying to figure out what to expect if I put the money into this? Do you think I could get a 10 degree temp increase or would it only be warm next to the stove?