High Speed Doors Reduce Heat Loss and Clear Window Allows Light Into Work Areas.  Portable Wireless Door Controls Attach to Forklift, Keeping the Operator from Having to abandon the Vehicle to Open the Door. Doors Reduce Noise from Adjacent Areas and Control Airborne Contaminants .  They Separate Inside Work Areas and Discourage Intruders When Product is Used as an Outside Door. Installations are Available in Motorized, Spring Assist, Chain Hoist Operator and Manual Hand Crank.