Is this your first winter in the garage/tent N4? I learned that when I vented my tent, which was in my house, into the garage, mold likes to grow. Of course being the winter I had no reason to go in there, but when I did I got a fuzzy warm feeling.
My garage sounds identical to yours. Attached to the house, only half insulated(the part that actually joins a room inside) and for the most part quite cold.
My garage sounds identical to yours. Attached to the house, only half insulated(the part that actually joins a room inside) and for the most part quite cold.