News Analysis

GSA Moving Towards Ban on Underfloor Air

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Underfloor air distribution (UFAD) is an approach to ventilation in commercial and institutional buildings in which conditioned air is distributed through a plenum created by raised (access) floors, which also typically carry electrical and communications cabling. It is a favorite strategy in green building circles because of claims that it can provide better occupant comfort with reduced energy costs and increased air quality, while allowing for easy maintenance and flexible use of space (see


Vol. 7, No. 1). However, UFAD is under scrutiny at the U.S. General Services Administration (GSA), said to be the nation’s biggest landlord and also a champion of green building.

Published July 10, 2007

Roberts, T. (2007, July 10). GSA Moving Towards Ban on Underfloor Air. Retrieved from