Inquiry (采购产品): Electric roof vents I have an 18000 square food building that I need to vent. Do you cary industrial sized electric roof vents and how many would it take to vent a building that size with a 15 foot celing? **** Hidden Message ***** Jim Lewis 91706 Company: Robinson Roofing E-mail: robinsonprofroof@aol.com **** Hidden Message ***** robinsonprofroof@aol.com
