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GB 29539-2013: Minimum allowable values of energy efficiency and energy efficiency grades for range hoods
GB 29539-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.010
F 01
Minimum allowable values of energy efficiency and
energy efficiency grades for range hoods
ISSUED ON: JUNE 09, 2013
IMPLEMENTED ON: OCTOBER 01, 2013
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Energy efficiency grades ... 5 
5 Minimum allowable values ... 6 
6 Evaluating values of energy conservation ... 6 
7 Test methods ... 6 
8 Inspection rules ... 6 
Appendix A (Normative) Standby and off power test methods of range hoods 8 
Minimum allowable values of energy efficiency and
energy efficiency grades for range hoods
1 Scope
This Standard specifies the energy efficiency grades, minimum allowable
values, evaluating values of energy conservation, test methods and inspection
rules for range hoods.
This Standard applies to the air-extraction range hood, whose rated voltage
does not exceed 250 V, which is installed on the upper part of household
cooking stove, range or similar appliances.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB/T 2828.1, Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 2829, Sampling procedures and tables for periodic inspection by
attributes (apply to inspection of process stability)
GB/T 17713-2011, Range hood
3 Terms and definitions
Terms and definitions determined by GB/T 17713-2011 and the following ones
are applicable to this document.
3.1
Minimum allowable values of energy efficiency for range hoods
The minimum allowable value energy efficiency of the range hood under the
specified test conditions.
3.2
Evaluating values of energy conservation for range hoods
The minimum allowable value of energy efficiency of an energy-saving range
hood under the specified test conditions.
3.3
Standby mode
The status in which the range hood is connected to the power supply, and only
provides restart, information or status display (including clock) functions, but
does not provide any main functions.
Note: The restart function refers to a function that enables the appliance to
switch to the main function mode by means of remote control, internal
sensor or timing clock.
3.4
Off mode
The status in which the range hood is connected to the power supply, but does
not provide any standby mode function or main function.
Note: It is also regarded as the off mode when only the off-status indication
(such as light-emitting diode) is provided.
3.5
Standby power
The active power of the range hood in standby mode, in watts (W).
3.6
Off power
The active power of the range hood in off mode, in watts (W).
4 Energy efficiency grades
The energy efficiency of range hoods is graded according to total pressure
efficiency, standby power, off power, normal odour reduction factor, and grease
emission limits. Its energy efficiency is divided into 5 grades (see Table 1), of
which grade 1 has the highest energy efficiency. The energy efficiency value of
products of each grade shall meet the requirements of Table 1.
Table 1 – Energy efficiency grades for range hoods
Appendix A 
(Normative) 
Standby and off power test methods of range hoods
A.1 Short-term power measurement method
This test only applies to the selected mode and the situation where the power
is stable. If the measured power change within 5 min is less than 5%, the power
is considered stable. In this case, the power value displayed by the instrument
can be directly read.
Connect the to-be-tested range hood to the measuring instrument and select
the measured mode. After the range hood has stabilized the power after at least
5 minutes, use the measuring instrument to measure the power consumption;
the time shall not be less than 5 minutes. During the measurement, if the power
value changes less than 5% (obtained from the maximum power value
observed), consider the power stable, and directly record the power value at
the end of 5 min from the measuring instrument.
A.2 Average power method
This test method applies to the selected mode or the situation where the
measured power is unstable. However, this method also applies to all situations
where the model is stable. This method uses the average power reading or
cumulative energy within the time period selected by the user.
Connect the to-be-tested range hood to the measuring instrument; select the
measured mode, and monitor the power consumption. The average power is
determined by the following "average power method" or "cumulative energy
method":
Average power method: The measuring instrument records a true average
power in the time period selected by the user; the selected time period shall not
be less than 5 minutes.
Cumulative energy method: The measuring instrument can accumulate the
energy consumption in the time period selected by the user; the selected time
period shall not be less than 5 minutes. The cumulative time period shall be
such that the total recorded value of energy and time is greater than 200 times
the resolution of the measuring instrument (including the power measuring
instrument and the time measuring instrument). Divide the accumulated energy
value by the measurement time to get the average power.