Minimum allowable values of energy efficiency and energy efficiency grades for gas cooking appliances
1 Scope
This document specifies the energy efficiency grades, technical requirements and test methods for gas cooking appliances.
This document is applicable to domestic gas stoves and integration cooking appliances (hereinafter collectively referred to as "domestic gas cooking appliances") with nominal heat inputs not exceeding 5.23 kW using city gas. It is also applicable to commercial gas cooking appliances such as wok ranges with nominal heat inputs ≤60 kW, commercial ovens for cooking with nominal heat inputs ≤80 kW, as well as water tank type steaming ovens, steam working ovens and steam generators with nominal heat inputs ≤80 kW (hereinafter collectively referred to as "commercial gas cooking appliances").
This document is not applicable to gas cooking appliances used in vehicles.
Note: The nominal heat inputs of domestic gas stoves and integration cooking appliances refer to the heat inputs of a single burner; and those of wok ranges, commercial ovens for cooking, steaming ovens and steam generators refer to the heat inputs of a single combustion unit.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 16410 Domestic gas cooking appliances
GB 35848-2024 Commercial gas-burning appliances
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 16410 and GB 35848 and the following apply.
3.1
minimum allowable values of energy efficiency for gas cooking appliances
minimum allowable thermal efficiency of gas cooking appliances under the test conditions specified in this document
4 Energy efficiency grades
4.1 Domestic gas cooking appliances
The energy efficiency of domestic gas cooking appliances is divided into three grades, among which Grade 1 represents the highest energy efficiency. The thermal efficiency values with regard to the grades shall not be lower than those specified in Table 1.
Table 1 Energy efficiency grades of domestic gas cooking appliances
Type of gas stoves Thermal efficiency, %
Grade 1 Grade 2 Grade 3
Built-in/Desktop 70 64 59
Integration 66 62 56
4.2 Commercial gas cooking appliances
The energy efficiency of commercial gas cooking appliances is divided into three grades, among which Grade 1 represents the highest energy efficiency. The thermal efficiency values with regard to the grades shall not be lower than those specified in Table 2.
Table 2 Energy efficiency grades of commercial gas cooking appliances
Type of gas stoves Thermal efficiency, %
Grade 1 Grade 2 Grade 3
Wok ranges 45 35 25
Commercial ovens for cooking 65 55 45
Steaming ovens 91 80 70
Steam generators 94 89 80
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Energy efficiency grades
5 Technical requirements
6 Test methods
Annex A (Normative) Method for thermal efficiency test of steam generators and steam working ovens
Minimum allowable values of energy efficiency and energy efficiency grades for gas cooking appliances
1 Scope
This document specifies the energy efficiency grades, technical requirements and test methods for gas cooking appliances.
This document is applicable to domestic gas stoves and integration cooking appliances (hereinafter collectively referred to as "domestic gas cooking appliances") with nominal heat inputs not exceeding 5.23 kW using city gas. It is also applicable to commercial gas cooking appliances such as wok ranges with nominal heat inputs ≤60 kW, commercial ovens for cooking with nominal heat inputs ≤80 kW, as well as water tank type steaming ovens, steam working ovens and steam generators with nominal heat inputs ≤80 kW (hereinafter collectively referred to as "commercial gas cooking appliances").
This document is not applicable to gas cooking appliances used in vehicles.
Note: The nominal heat inputs of domestic gas stoves and integration cooking appliances refer to the heat inputs of a single burner; and those of wok ranges, commercial ovens for cooking, steaming ovens and steam generators refer to the heat inputs of a single combustion unit.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 16410 Domestic gas cooking appliances
GB 35848-2024 Commercial gas-burning appliances
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 16410 and GB 35848 and the following apply.
3.1
minimum allowable values of energy efficiency for gas cooking appliances
minimum allowable thermal efficiency of gas cooking appliances under the test conditions specified in this document
4 Energy efficiency grades
4.1 Domestic gas cooking appliances
The energy efficiency of domestic gas cooking appliances is divided into three grades, among which Grade 1 represents the highest energy efficiency. The thermal efficiency values with regard to the grades shall not be lower than those specified in Table 1.
Table 1 Energy efficiency grades of domestic gas cooking appliances
Type of gas stoves Thermal efficiency, %
Grade 1 Grade 2 Grade 3
Built-in/Desktop 70 64 59
Integration 66 62 56
4.2 Commercial gas cooking appliances
The energy efficiency of commercial gas cooking appliances is divided into three grades, among which Grade 1 represents the highest energy efficiency. The thermal efficiency values with regard to the grades shall not be lower than those specified in Table 2.
Table 2 Energy efficiency grades of commercial gas cooking appliances
Type of gas stoves Thermal efficiency, %
Grade 1 Grade 2 Grade 3
Wok ranges 45 35 25
Commercial ovens for cooking 65 55 45
Steaming ovens 91 80 70
Steam generators 94 89 80
Contents of GB 30720-2025
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Energy efficiency grades
5 Technical requirements
6 Test methods
Annex A (Normative) Method for thermal efficiency test of steam generators and steam working ovens
