12 Aug 2016
Energy Test Procedures for Ceiling Fans Amended
The U.S. Department of Energy has issued a final rule that amends the energy test procedures for ceiling fans. Specifically, the DOE has established an integrated efficiency metric for ceiling fans based on airflow and power consumption at high and low speed for low-speed small-diameter ceiling fans, at high speed for high-speed small-diameter ceiling fans, and at up to five speeds for large-diameter ceiling fans. The integrated efficiency metric also accounts for power consumed in standby mode. Additionally, the agency has adopted new test procedures for large-diameter ceiling fans, multi-mount ceiling fans, ceiling fans with multiple fan heads, and ceiling fans where the airflow is not directed vertically.
Moreover, the final rule includes clarifications as to when these methods must be conducted as well as the following changes to the current test procedure: (i) eliminating the test cylinder from the test setup; (ii) specifying the method of measuring the distance between the ceiling fan blades and the air velocity sensors during testing; (iii) specifying the fan configuration during testing for ceiling fans that can be mounted in more than one configuration; (iv) specifying the test method for ceiling fans with heaters; (v) specifying that a ceiling fan is not subject to the test procedure if the plane of rotation of the ceiling fan’s blades cannot be within 45 degrees of horizontal; (vi) specifying that centrifugal ceiling fans are not subject to the test procedure; (vii) specifying that all small-diameter ceiling fans must be mounted directly to the real ceiling for testing; (viii) revising the allowable measurement and mounting tolerances for air velocity sensors; (ix) revising the testing temperature requirement; (x) requiring measurement axes to be perpendicular to walls; (xi) specifying the position of air conditioning vents and doors during testing; (xii) specifying the operation of room conditioning equipment; (xiii) specifying the power source and how power measurements are to be made; and (xiv) specifying stable measurement criteria and a method for determining stability.
While the final rule is effective 24 August, the energy test procedure changes will be mandatory for representations of energy use or efficiency starting 23 January 2017.