in the space and prevent the sensation of stagnant air conditions, often associated with poor air quality. The major practical differences are that in UFAD, air is supplied at a higher velocity through smaller-size supply outlets than in DV, and the supply outlets are usually controlled by the occupants. List of notable buildings using UFAD systems References External links Slides from a Center for the Built Environment workshop about UFAD. The Center for the Built Environment (CBE), University of California, Berkeley. http://www.cbe.berkeley.edu/ Professional and Trade groups that provide research funding and publish standards or guides regarding UFAD systems include: American Society of Heating, Refrigerating and Air-Conditioning Engineers, (ASHRAE) http://www.ashrae.org/ Air-Conditioning and Refrigeration Technology Institute (ARTI) The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) http://www.ahrinet.org/ Heating, ventilation, and air conditioning Building biology Low-energy building Environmental design Ventilation