Fan controls don't measure up

摘要

The fan controls at an airport terminal had never been reviewed, and needed to be updated with variable frequency drives. During a recent inspection of the HVAC systems for a 1 -million-sq-ft airport terminal, the exp U.S. Services team noticed the installation of inlet vanes on about 35 of the variable air volume (VAV) air handlers. This seemed particularly odd because the fans were only about 10 years old.