National Aeronautics and Space Administration

Revolving Exterior Doors

Replace exterior doors with revolving doors to prevent outside air from entering the building. This would save on heating in the winter and cooling in the summer.

 

The current automatic doors remain open long after the user passes through. With the door wide open, air conditioning (or heat) escapes the building. A revolving door would prevent large amounts of interior conditioned air to escape, thus saving on utilities.

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Idea No. 297