Pt. 430, Subpt. B, App. U
Appendix U to Subpart B of Part 430
—Uniform Test Method for Measuring the Energy Consumption of Ceiling Fans
1. Scope. This appendix covers the test requirements used to measure the energy performance of ceiling fans.
a. Airflow means the rate of air movement at a specific fan-speed setting expressed in cubic feet per minute (CFM).
b. Airflow efficiency means the ratio of airflow divided by power at a specific ceiling fan-speed setting expressed in CFM per watt (CFM/watt).
3. Test Apparatus and General Instructions:
The test apparatus and instructions for testing ceiling fans shall conform to the requirements specified in Chapter 3, “Air-Delivery Room Construction and Preparation,” Chapter 4, “Equipment Set-up and Test Procedure,” and Chapter 6, “Definitions and Acronyms,” of the EPA's “ENERGY STAR Testing Facility Guidance Manual: Building a Testing Facility and Performing the Solid State Test Method for ENERGY STAR Qualified Ceiling Fans,” Version 1.1, December 9, 2002 (Incorporated by reference, see § 430.22
). Record measurements at the resolution of the test instrumentation. Round off calculations to the same number of significant digits as the previous step. Round the final energy consumption value to the nearest whole number as follows:
(i) A fractional number at or above the midpoint between the two consecutive whole numbers shall be rounded up to the higher of the two whole numbers; or
(ii) A fractional number below the midpoint between the two consecutive whole numbers shall be rounded down to the lower of the two whole numbers.
4. Test Measurement:
Measure the airflow and airflow efficiency for ceiling fans, expressed in cubic feet per minute (CFM) and CFM per watt (CFM/watt), in accordance with the test requirements specified in Chapter 4, “Equipment Setup and Test Procedure,” of the EPA's “ENERGY STAR Testing Facility Guidance Manual: Building a Testing Facility and Performing the Solid State Test Method for ENERGY STAR Qualified Ceiling Fans,” Version 1.1, December 9, 2002 (Incorporated by reference, see § 430.22
). In performing the airflow test, measure ceiling fan power using a RMS sensor capable of measuring power with an accuracy of ±1 %. Prior to using the sensor and sensor software it has selected, the test laboratory shall verify performance of the sensor and sensor software. Measure power input at a point that includes all power consuming components of the ceiling fan (but without any attached light kit energized). Measure power at the rated voltage that represents normal operation continuously over the time period for which the airflow test is conducted, and report the average value of the power measurement in watts (W). Use the average value of power input to calculate the airflow efficiency in CFM/W.