The air quality in The Big Apple can result in some pretty substantial problems with rooftop cooling towers for commercial HVAC systems. Twenty years ago the owners of a large uptown commercial building on Madison Avenue, NYC decided to include an automatic self-cleaning screen filter in their new HVAC system to ward offlikely problems with water quality. Today the big roof-mounted 900 ton cooling tower continues to acts as a large community air cleaner. Pollen, dust, insects and smoke are scrubbed from the atmosphere by the large tower. Over forty water cooled package units use the cooling tower to condition the indoor air of this commercial building. The protection provided by the filtration system is what convinced management to replace the initial installation with an improved product fifteen years later. However, the controls for the system presented a big hurdle.
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