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July 9, 2009 -
One way to improve the efficiency of the air distribution system is to make sure that components are operating properly, says the U.S. Environmental Protection Agency’s Energy Star program. For example, when systems have pneumatic controls, the thermostats require recalibration on a regular basis – typically once or twice a year. That sort of preventive maintenance is a better strategy than waiting for complaints from occupants who are too hot or too cold.
Zone dampers are another potential trouble spot. Facility staff should regularly inspect the damper, linkage, and actuator for to ensure they’re operating properly. In systems in older buildings haven’t been carefully maintained, there’s a good chance of having some zone dampers frozen in one position. Tackling that problem can be an expensive and lengthy process, especially in big buildings. Consider allocating a portion of the annual maintenance budget for this purpose to address a certain quantity or percentage of zones. For example, in a 100,000-square-foot, 10-story office building with 150 VAV zones, the maintenance budget might include time and money to evaluate 50 VAV zones per year.
Steps like these can not only reduce energy use, but also improve occupant comfort.
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