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Glossary

Terms for Architecture, Green Building & Energy


This glossary includes more than 300 solar terms, as well as hundreds of additional sustainable design and construction terms.

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Air Change Effectiveness (ACE)

Definition: Air change effectiveness describes the ability of an air distribution system to provide ventilation (outside) air at the breathing zone (where occupants breathe).ACE is defined as the age of air that would occur throughout the space if the air was perfectly mixed, divided by the average age of air where occupants breathe