MIT Study Finds Revolving Doors Reduce Air Infiltration Compared to Swinging Doors

In 2006, a team of graduate students at MIT conducted an analysis of door use in one building on campus, E25, where they found just 23% of visitors used the revolving doors.

According to their calculations, the swinging door allowed as much as 8 times more air to pass through the building than the revolving door.

Based on their energy costs in 2006, the study concluded that if everyone were to use the revolving doors in Building E25, MIT would save almost $7,500 in natural gas a year. That's enough to heat five houses over the same time frame.

MIT published the study and encouraged students to used the revolving doors in all buildings to save energy.