Federal Register - December 7, 2021
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Source: Federal Register
Federal Register / Vol. 86, No. 232 / Tuesday, December 7, 2021 / Proposed Rules
4.3 Calculation of airflow and efficiency for multi-head ceiling fans:
Calculate airflow for each fan head using the method described in section 4.2 of this appendix. To calculate overall airflow at a given speed for a multi-head ceiling fan, sum
the airflow for each fan head included in the ceiling fan a single airflow can be applied to each of the identical fan heads, but at least one of each unique fan head must be tested.
The power consumption is the measured power consumption with all fan heads on.
Ceiling Fan Efficiency CFM/W
= __L___i_cF_M__;_x_oH_,___ _ _
WsbxOHsb
lotter on DSK11XQN23PROD with PROPOSALS4
Where:
CFMi = sum of airflows for each head at speed i, OHi = operating hours at speed i as specified in Table 2 of this appendix, Wi = power consumption at speed i, OHSb = operating hours in standby mode as specified in Table 2 of this appendix, and WSb = power consumption in standby mode.
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+ L;W;xOH;
5. Calculation of Ceiling Fan Energy Index CFEI From the Test Results for Large Diameter Ceiling Fans, High-Speed BeltDriven Ceiling Fans, and Large-Diameter Belt-Driven Ceiling Fans:
Calculate CFEI, which is the FEI for largediameter ceiling fans, high-speed belt-driven ceiling fans, and large-diameter belt-driven ceiling fans, at the speeds specified in section 3.5 of this appendix according to ANSI/
PO 00000
Using the airflow as described in this section, and power consumption measurements from section 3.3 of this appendix, calculate ceiling fan efficiency for a multi-head ceiling fan as follows:
AMCA 20818, with the following modifications:
1 Using an Airflow Constant Q0 of 26,500 cubic feet per minute;
2 Using a Pressure Constant P0 of 0.0027 inches water gauge; and 3 Using a Fan Efficiency Constant h0 of 42 percent.
FR Doc. 202125416 Filed 12621; 8:45 am BILLING CODE 645001P
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