Eugene DeJoannis, P.E., Technical Associate, VanZelm Heywood & Shadford, West Hartford, Conn.

The Right Mix

The invention of the air-side economizer was a great boon to the HVAC industry as it made it possible to circulate large volumes of outdoor air when the conditions are favorable. The technology saved huge amounts of mechanical cooling energy, and money, in temperate climates and is a feature now required in most energy codes.