When you start checking for heaters, check out Lowes if there is one near you. I have a shed for my quilting that is separate from the house. I bought two small heaters for my 14' X 24' space and they work great. Of course, the shed is insulated and it doesn't stay cold for as long in Oklahoma as it does in Illinois. I do strongly suggest you wall off your space and insulate. It will be warmer and also help keep the varmits (sp?) out!