GB29539-2025
Minimum allowable values of energy efficiency and energy efficiency grades for household and similar range hoods and ventilating fans
家用和类似用途吸油烟机与换气扇能效限定值及能效等级
GB 29539-2025 is an upcoming mandatory Chinese national standard for Minimum allowable values of energy efficiency and energy efficiency grades for household and similar range hoods and ventilating fans. It appears in the Construction compliance cluster with a energy efficiency focus and has an implementation date of Nov 1, 2026.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to externally exhausted range hoods with a rated voltage not exceeding 250V, installed above household cooking appliances, and motor-driven ventilating fans (including multi-functional appliances with ventilation functions) with a single-phase rated voltage ≤250V, rated ventilation input power ≤500W, and impeller diameter ≤500mm. It does not apply to down-draft systems, commercial range hoods, industrial ventilating fans, or fans designed for special conditions such as corrosive or explosive environments. It also excludes Type C ventilating fans, bi-directional fans, and specific Type B and D fans with maximum static pressure less than 25Pa.
Technical requirements
The standard establishes a 3-tier energy efficiency grading system for both range hoods and ventilating fans, with Grade 1 representing the highest efficiency. For range hoods, it specifies requirements for total pressure efficiency at working airflow, standby power, off-mode power, instantaneous odor reduction, and grease separation. Manufacturers must ensure their products meet the Grade 3 minimum allowable values to enter the market. For ventilating fans, the standard sets energy efficiency values based on impeller specifications or nominal airflow, along with limits for standby and off-mode power. Additionally, for multi-functional appliances with heating functions (Type B ventilating fans), it defines a maximum limit for heating energy consumption. The standard also introduces new implementation requirements for market surveillance.
Testing methods
Testing involves measuring air performance curves to determine the working airflow and total pressure efficiency for range hoods, referencing methods in GB/T 17713-2022. Standby and off-mode power are measured using either short-term power measurement or average power methods under specified environmental conditions. For ventilating fans, energy efficiency is calculated by measuring airflow and input power at specific static pressures (0Pa for Type A, 25Pa for Types B and D). Heating energy consumption for multi-functional appliances is tested by measuring temperature rise and electricity consumption until a steady state is reached.
FAQs
What products are regulated under GB 29539-2025?
GB 29539-2025 regulates household and similar externally exhausted range hoods (≤250V) and motor-driven ventilating fans (≤250V, ≤500W, ≤500mm impeller), including multi-functional appliances with ventilation functions.
Are there any updates from the previous version of GB 29539?
Yes, GB 29539-2025 replaces both GB 29539-2013 and GB 32049-2015. Key updates include changes to the scope, terminology, energy efficiency grading, and testing methods, as well as the addition of standard implementation requirements and the removal of energy-saving evaluation values.
What is the minimum energy efficiency requirement for market access?
The minimum allowable values for energy efficiency correspond to Grade 3 in the standard's grading system. Products must meet these Grade 3 limits, along with standby power (≤2.0W) and off-mode power (≤1.0W) requirements, to be compliant.
The summary above provides a high-level overview of GB 29539-2025. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 29539-2025 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Management
- CCS
- F01
- ICS
- 27.010
- Competent department
- Standardization Administration of China
- Technical committee
- National Technical Committee on Energy Fundamentals and Management of Standardization Administration of China
Relationships
Replaces:GB 29539-2013 (Current) , GB 32049-2015 (Current)