WHPA FDD Committee Helps CEC with New Title 24 Economizer Requirement

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The California Energy Commission (CEC) approved an important energy efficiency measure for the 2013 Title 24 Nonresidential Building Energy Standards that requires economizer fault detection and diagnostic (FDD) on all replacement and new rooftop HVAC systems 4.5 tons and larger. The new requirement will be in force starting July 1, 2014.

The WHPA Fault Detection Diagnostics (FDD) Committee, chaired by Dr. Kristin Heinemeier of UC Davis Western Cooling Efficiency Center (WCEC), played a key role in bringing key stakeholders together to develop and support the Title 24 measure.

The CEC has established the 2013 Manufacturer Certification for Equipment, Products and Devices website for FDD. The site provides a declaration and guidance for manufacturer's to follow to certify that their FDD systems meet the Title 24 requirements. The site lists products that have completed the CEC certification process.

The California economizer requirement is the model for a similar requirement in the 2015 International Energy Conservation Code. THE IEE code, IECC along with ASHRAE 90.1, serves as the commercial building energy code in 44 states.
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