I need to ask a couple of questions. I've just bought the small house next door to me to hopefully turn into my sewing craft house. The house was built in 1940, has no central heat or air. My first question is this... will having window air conditioners affect my fabric, sewing machine and serger? Will having an old Deerborn gas heater affect them? Also when I hopefully get organized I had planned on putting vinyl or a clear shower curtain liner on the front of my bookcases to keep the dust off my fabric. Would this be okay? I would appreciate any advice you ladies could give me. Thank you Carol