Hair Dryers:

Energy Conservation Labeling Program Requirements for Hair Dryers
(Updated and in effect February 6, 2007)

I. The scope of application, energy consumption test method and energy efficiency Useful Energy Ratio (UER) for the hair dryers (“products”) applying for Energy Label certification shall meet the following requirements:

(I) Scope: The applicable products shall be hand-supported hair dryers which meet the requirements of CNS 3714-C4122.

(II) The test method and test conditions for measuring the energy consumption of the products shall be defined based on the requirements for measuring air flow as stipulated in the AMCA 210-99 Standard, as well as the requirements for measuring fluid temperature as stipulated in the ASHRAE 41.1 Standard.
1.Ambient conditions: During the test, the ambient temperature shall be maintained at 27±3℃, and the ambient relative humidity shall be maintained at below 85%.
2.Test equipment: The air flow parameters shall be referred to as in the standard wind tunnel defined in AMCA 210-99 (see Figure 1 below). The measurement of the exit temperature shall be made in accordance with the requirements of ASHRAE 41.1. After the jet flow from the hair dryer has been converted to uniform flow with the use of the flow regulating device, the temperatures are measured at the centers of the four parts which are equally divided from the downstream area, and the averages of the 4 temperature measurements are taken as the final exit temperature. The position of zero static pressure is adjusted to between the flow-regulating device and the hair dryer exit and located at the 100 mm downstream of the exit of hair dryer nozzle.
3.Test voltage and frequency: During the test, the rated electrical voltage shall be 110V±2%, and the rated frequency shall be 60Hz. The power consumption is measured in unit of Wh.
4.Test method for energy efficiency Useful Energy Ratio (UER): Use a suitable clamp to hold and connect the hair dryer sample under testing with the inlet of the standard wind tunnel in an air-tight manner, and turn on the hair dryer with the HIGH setting. Adjust the venting fan at the rear of the standard wind tunnel, so that the reading of the pressure differential device at the zero static pressure position reads zero. Maintain the system operation for 10 minutes until the system reaches a steady state. After 10 minutes, record for five minutes the tested hair dryer sample’s accumulated power consumption, temperatures at the four center positions downstream, air mass flow rate in the wind tunnel and the ambient air temperature. Calculate the average of the temperatures measured at the four center points during the five-minute period, and use the average value as the final exit temperature of the tested hair dryer. Calculate the UER with the following equation:

(III) Under the HIGH air flow setting, the measured UER for the tested hair dryer shall meet the following requirements:
Diameter of hair dryer’s air nozzle (mm)
UER (%)
< 50
≧ 80
≧ 50
≧ 90

II. Notes on product labeling:  
(I) The name and address of the label user shall be clearly displayed on the product or product packaging.
(II) If the label user is an agent, the name and address of the product manufacturer shall also be clearly displayed on the product or product packaging.
(III) The Useful Energy Ratio (UER) (%) shall be stated in the product catalog.
(IV) The Useful Energy Ratio (UER) shall be rounded to integer.


Lately update: 2013/03/07 15:26:00