Hi im new to this Forum. I am building a New Shop still wondering if in floor heat is good?? I read all the posts and came away more confused than before. Some say good on costs other says 800 Gallons Propane a month>?? I have to do more reading i guess. It gets cold here sometimes -35 or maybe a -40 day or two. Any tips hints appreciated. I am building a airboat this winter in my New Shop just because i really want one. Later Mike