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Federal Register / Vol. 86, No. 232 / Tuesday, December 7, 2021 / Proposed Rules
or motor, would constitute a different category of fan head.
Step 8: For multi-head ceiling fans, measure active real power consumption in all phases simultaneously at each speed continuously for 100 seconds with all fan heads turned on, and record the average value at each speed in watts W.
For ceiling fans with an oscillating function, measure active real power consumption in all phases simultaneously at each speed continuously for 100 seconds with the oscillating function turned on.
Record the average value of the power measurement in watts W.
For both multi-head ceiling fans and fans with an oscillating function, repeat power consumption measurement until stable power measurements are achieved.

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positions away from the sensor 1 along the A axis, substitute the air velocity at A axis sensor 4 for the average air velocity at sensor 1. Take the average of the air velocity at A
axis sensors 3 and 5 as a substitute for the average air velocity at sensor 2, take the average of the air velocity at A axis sensors 2 and 6 as a substitute for the average air velocity at sensor 3, etc. Lastly, take the average of the air velocities at A axis sensor 10 and C axis sensor 4 as a substitute for the average air velocity at sensor 7. Stability criteria apply after these substitutions. For example, air velocity stability at sensor 7 are determined based on the average of average air velocity at A axis sensor 10 and C axis sensor 4 in successive measurements. Any air velocity measurements made along the BD
axis are not included in the calculation of average air velocity.

3.3.3 Air Velocity Measurements for Ceiling Fans With Airflow Not Directly Downward:
Using the number of sensors that cover the same diameter as if the airflow were directly downward, record air velocity at each speed from the same number of continuous sensors with the largest air velocity measurements.
This continuous set of sensors must be along the axis that the ceiling fan tilt is directed in and along the axis that is 180 degrees from the first axis. For example, a 42-inch fan tilted toward axis A may create the pattern of air velocity shown in Figure 4 of this appendix. As shown in Table 1 of this appendix, a 42-inch fan would normally require 7 active sensors per axis. However, because the fan is not directed downward, all sensors must record data. In this case, because the set of sensors corresponding to maximum air velocity are centered 3 sensor
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Figure 4 to Appendix U to Subpart B of Part 430: Example Air Velocity Pattern for Airflow Not Directly Downward
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3.5 Active mode test measurement for large-diameter ceiling fans, high-speed beltdriven ceiling fans and large-diameter beltdriven ceiling fans:
1 Test large-diameter ceiling fans in accordance with AMCA 20818
incorporated by reference, see 430.3, in all phases simultaneously at:
a High speed, and b 40 percent or the nearest speed that is not less than 40 percent speed.
2 Test high-speed belt-driven ceiling fans and large-diameter belt-driven ceiling fans in accordance with AMCA 20818, in all phases simultaneously at:
a High speed, and
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b 40 percent or the nearest speed that is not less than 40 percent speed, if the fan is capable of multi-speed operation.
3 When testing at 40 percent speed for large-diameter ceiling fans that can operate over an infinite number of speeds e.g., ceiling fans with VFDs, ensure the average measured RPM is within the greater of 1% of the average RPM at high speed or 1 RPM. For example, if the average measured RPM at high speed is 50 RPM, for testing at 40%
speed, the average measured RPM should be between 19 RPM and 21 RPM. If the average measured RPM falls outside of this tolerance, adjust the ceiling fan speed and repeat the test. Calculate the airflow and measure the active real power consumption in all phases simultaneously in accordance with the test requirements specified in sections 8 and 9, AMCA 23015, with the following modifications:
3.5.1 Measure active real power consumption in all phases simultaneously at a point that includes all power-consuming components of the ceiling fan. If present, any additional accessories or features sold with the ceiling fan that do not relate to the ceiling fans ability to create airflow by rotation of the fan blades for example light kit, heater, air ionization, ultraviolet technology are to be installed but turned off during testing. If
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the accessory/feature cannot be turned off, it shall be set to the lowest energy-consuming mode during testing.

3.6 Test measurement for standby power consumption.
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a The ability to facilitate the activation or deactivation of other functions including active mode by remote switch including remote control, internal sensor, or timer.
b Continuous functions, including information or status displays including clocks, or sensor-based functions.

4. Calculation of Ceiling Fan Efficiency From the Test Results:
4.1 Calculation of effective area for smalldiameter ceiling fans other than high-speed belt-driven ceiling fans:
Calculate the effective area corresponding to each sensor used in the test method for small-diameter ceiling fans other than highspeed belt-driven ceiling fans section 3.3 of this appendix with the following equations:
1 For sensor 1, the sensor located directly underneath the center of the ceiling fan, the effective width of the circle is 2 inches, and the effective area is:

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3.4 Test apparatus for large-diameter ceiling fans, high-speed belt-driven ceiling fans and large-diameter belt-driven ceiling fans:
The test apparatus and instructions for testing large-diameter ceiling fans, HSBD and LDBD ceiling fans must conform to the requirements specified in sections 3 through 7 of AMCA 23015 incorporated by reference, see 430.3, with the following modifications: