GB21519-2008
Minimum allowable values of the energy efficiency and energy efficiency grades for electrical storage water heaters
储水式电热水器能效限定值及能效等级
GB 21519-2008 is a current mandatory Chinese national standard for Minimum allowable values of the energy efficiency and energy efficiency grades for electrical storage water heaters. It appears in the Electronics compliance cluster with a electrical safety focus and has an implementation date of Nov 1, 2008.
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 specifies the minimum allowable values of energy efficiency, energy-saving evaluating values, and energy efficiency grades for household and similar electrical storage water heaters. It is exclusively applicable to storage-type electric water heaters and does not cover instant or other types of water heating systems. Compliance with this standard is mandatory for manufacturers targeting the Chinese market.
Technical requirements
The standard establishes a 5-tier energy efficiency grading system, where Grade 1 represents the highest efficiency. It defines the minimum allowable values based on the 24h inherent energy consumption coefficient and the hot water output rate. Products must meet at least Grade 5 requirements to be legally sold, with a stepped upgrade to Grade 4 required two years after implementation. Additionally, the standard sets an energy-saving evaluating value corresponding to Grade 2, serving as a benchmark for high-efficiency products. The 24h inherent energy consumption is calculated against a baseline formula determined by the rated capacity of the heater. Manufacturers must ensure their products meet these dual metrics of energy loss and hot water delivery to achieve the desired efficiency grade.
Testing methods
The standard outlines specific testing procedures, including the capacity test, which measures the actual volume by weighing the water-filled heater. The 24h inherent energy consumption test requires precise thermocouple placement on the container and a 48-hour measurement cycle under controlled ambient temperatures. Furthermore, the hot water output rate test evaluates the heater's ability to deliver hot water by measuring the discharged water mass and temperature differentials until the output temperature drops by 20°C from its peak. Strict environmental conditions, including specific ambient temperatures and humidity levels, must be maintained during all tests.
FAQs
What products are regulated under GB 21519-2008?
GB 21519-2008 regulates household and similar electrical storage water heaters. It does not apply to instant water heaters.
What is the minimum energy efficiency requirement for entering the Chinese market?
Products must meet at least Grade 5 requirements as the minimum allowable value, which upgrades to Grade 4 two years after the standard's implementation date.
How is the energy efficiency grade determined?
The grade is determined by two key metrics: the 24h inherent energy consumption coefficient and the hot water output rate, tested according to the specific procedures outlined in the standard.
The summary above provides a high-level overview of GB 21519-2008. 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 21519-2008 today to access all detailed parameters, calculation formulas, 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