The California Energy Commission held a staff workshop on July 11 to discuss a proposal regarding appliance efficiency regulations for commercial and industrial fans and blowers. The focus of the proposal is on standalone fans and embedded fans in non-regulated equipment. Details of the proposal can be found here.
A key performance metric is the fan energy index, or FEI, which expresses the ratio of the electrical input power of a reference fan to that of the actual fan calculated under the same conditions per ANSI/AMCA Standard 208-18, “Calculation of the Fan Energy Index.” The FEI metric accounts for motor, transmission, and control efficiencies, and allows the consumer to select a fan based on an overall energy index rather than a specific flow rate or pressure point.
With a data set of 295 fans with motors ≥ 1 hp, technical feasibility was established in the study. Fans covered under the proposed regulation must have a rated shaft input power ≥ 1 hp, or, for fans without a rated shaft input power, an electrical input power greater ≥ 1 kW. Furthermore, covered fans must have a fan airpower ≤ 150 HP. This recommended range is meant to cover the majority of total fan energy consumption while limiting burdens on manufacturers.
At the workshop, stakeholders noted that fan types should be considered more carefully. For example, the inline fan example may not be representative of centrifugal fans or other types. Similarly, on the rooftop, exhaust and return fans (with low pressures) are not the same case as supply fans (used at higher static pressures in air handlers). Another stakeholder noted that the dependency on climate zones is not reflected in the test procedures.
Estimated statewide energy savings are 50 GWh in the first year for standalone fans and 24 GWh in the first year for embedded fans. After full stock turnover, the energy savings for standalone fans and embedded fans would be 1400 GWh/yr and 430 GWh/yr, respectively. This 1830 GWh/yr total compares to 2200 GWh/yr savings for battery chargers and 859 GWh/yr for state-regulated LEDs.
A transcript of the staff workshop held on July 11, 2018 can be found at: https://efiling.energy.ca.gov/GetDocument.aspx?tn=224516
Similarly, a document clarifying the data requested for the commercial and industrial fans and blowers rulemaking (Docket #17-AAER-06) can be found at: https://efiling.energy.ca.gov/GetDocument.aspx?tn=224572