Fold Tite now manufactures and sells the Cool-Air, Inc. and Manual Hangar Doors from their Mechanicville, NY plant. We specialize in General Aviation aircraft hangar doors and similar sized large doors that are manually operated. No Electrical Power Needed. Yet these doors are easy for normal people to open and close. Strong and safe! Built like an airplane - strong yet no more weight than needed to do the job. Designed to handle wind loads, open or closed! We have MANY different designs to deal with climatic or site specific conditions for your area. There is never just one answer for a door!