GB21454-2021
Minimum allowable values of the energy efficiency and energy efficiency grades for multi-connected air-condition (heat pump) units
多联式空调（热泵）机组能效限定值及能效等级
GB 21454-2021 is a current mandatory Chinese national standard for Minimum allowable values of the energy efficiency and energy efficiency grades for multi-connected air-condition (heat pump) units. It appears in the Construction compliance cluster with a energy efficiency focus and has an implementation date of Nov 1, 2022.
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 multi-connected air-condition (heat pump) units (VRF systems) and low ambient temperature air source multi-connected heat pump units utilizing either air-cooled or water-cooled condensers. It is mandatory for manufacturers producing or importing these specific HVAC products into the Chinese market. The standard specifically covers energy efficiency grades, minimum allowable values, and testing methods for these systems, including newly added requirements for low-temperature operation down to -25°C.
Technical requirements
The standard establishes a 3-tier energy efficiency grading system (Grade 1 being the highest) based on different performance metrics depending on the unit type. For air-cooled cooling-only units, grading is based on the measured Seasonal Energy Efficiency Ratio (SEER) and minimum Energy Efficiency Ratio (EER_min). Air-cooled heat pump units are evaluated using the Annual Performance Factor (APF), while water-cooled units rely on the Integrated Part Load Value (IPLV(C)) and EER. For low ambient temperature units, the standard introduces specific requirements using the Heating Seasonal Performance Factor (HSPF) and Coefficient of Performance (COP) at extreme low temperatures (-12°C and -20°C). Products must meet the Grade 3 limits as the mandatory minimum allowable values to enter the market. Additional technical requirements include strict limits on standby power (not exceeding 15W for smaller units) and specific operational rules for electric auxiliary heating. For instance, auxiliary heating must not automatically activate when outdoor temperatures are at or above 0°C for standard units, or -20°C for low-temperature units. The standard also defines tolerances, requiring measured efficiency values to be no less than 95% of labeled values.
Testing methods
Testing procedures are primarily based on referenced standards GB/T 18837-2015 and GB/T 25857-2010. The standard specifies testing for SEER, APF, IPLV(C), and EER_min under defined nominal and part-load conditions. For low-temperature units, HSPF testing involves a 5-point test method (Points A to E) across varying outdoor temperatures (-20°C to 7°C) and load rates, as detailed in the normative Annex A. Tests also include verifying standby power consumption and monitoring the automatic activation behavior of auxiliary electric heating systems across specific temperature gradients.
FAQs
What products are regulated under GB 21454-2021?
GB 21454-2021 regulates multi-connected air-condition (heat pump) units (VRF) and low ambient temperature air source multi-connected heat pump units with air-cooled or water-cooled condensers. It covers both cooling-only and heat pump types.
Are there any updates from the previous version of GB 21454?
Yes, this 2021 version replaces GB 21454-2008. Key updates include the addition of requirements for low ambient temperature units, revised energy efficiency grade indicators, updated minimum allowable values, and the introduction of implementation timelines for existing versus new products.
What is the mandatory minimum energy efficiency limit under this standard?
The mandatory minimum allowable values correspond to the Grade 3 energy efficiency indicators specified in the standard's tables for each product type (e.g., SEER, APF, IPLV(C), or HSPF). Products must meet or exceed these Grade 3 limits to be legally sold in China.
The summary above provides a high-level overview of GB 21454-2021. 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 21454-2021 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Foundational
- CCS
- F01
- ICS
- 27.010
- Competent department
- Standardization Administration of China
- Technical committee
- Standardization Administration of China
Relationships
Replaces:GB 21454-2008