i want to build a 40'W x 60'L x (20'H at peak) garage with a heated slab and 2 hot dawg heaters in the corners across from each other. have the heat around 66-70 i like to work in a t-shirt and be warm have it at 66 if your working hard or at 70 if your hardly working LOL I would want my garage an actual shop with plumbing and a upstairs loft to pretty much live in LOL