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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 26969-2025: Minimum allowable values of energy efficiency and energy efficiency grades for domestic solar water heating systems Status: Valid GB 26969: Historical versions
Basic dataStandard ID: GB 26969-2025 (GB26969-2025)Description (Translated English): Minimum allowable values of energy efficiency and energy efficiency grades for domestic solar water heating systems Sector / Industry: National Standard Classification of Chinese Standard: F01 Classification of International Standard: 27.010 Word Count Estimation: 14,159 Date of Issue: 2025-08-01 Date of Implementation: 2026-08-01 Older Standard (superseded by this standard): GB 26969-2011 Issuing agency(ies): State Administration for Market Regulation, Standardization Administration of China GB 26969-2025: Minimum allowable values of energy efficiency and energy efficiency grades for domestic solar water heating systems---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB26969-2025 ICS 27.010 CCSF01 National Standard of the People's Republic of China Replaces GB 26969-2011 Energy efficiency limit values for domestic solar water heating systems and energy efficiency rating Released on August 1, 2025 Implementation on August 1, 2026 State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Energy efficiency class 1 5 Technical Requirements 2 6 Test and calculation methods 2 Appendix A (Informative) Example of Calculation of Energy Efficiency Coefficient of Domestic Solar Water Heating System 4 Table 1 Energy efficiency rating of compact domestic solar water heating systems 2 Table 2 Energy efficiency rating of split indirect (split double circuit) domestic solar water heating system 2 Table 3 Energy efficiency rating of split direct (split single circuit) domestic solar water heating system 2 Table 4 Energy efficiency rating of sun-heating household solar water heating system 2 Table 5 Energy efficiency rating of domestic solar water heating systems for heating 2 Table 6 Minimum daily heat gain and maximum average heat loss factor of domestic solar water heating system Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB 26969-2011 "Limited values of energy efficiency and energy efficiency grades for domestic solar water heating systems" and GB 26969-2011 In addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The energy saving evaluation value has been deleted (see 3.4 and 5.4 of the.2011 edition); b) The basic requirements (see 5.1 of the.2011 edition) have been deleted; c) Deleted the inspection rules (see Chapter 7 of the.2011 edition); d) Changed the energy efficiency rating values for compact domestic solar water heating systems (see Table 1, Table 1 of the.2011 edition); e) Changed the energy efficiency rating values for split indirect (split double circuit) domestic solar water heating systems (see Table 2, Table 3 of the.2011 edition); f) Changed the energy efficiency rating values for split direct (split single circuit) domestic solar water heating systems (see Table 3, Table 2 of the.2011 edition); g) Changed the energy efficiency rating values for domestic solar water heating systems (see Table 4, Table 4 of the.2011 edition); h) Added energy efficiency rating values for domestic solar water heating systems (see Table 5); i) Added the requirements for energy efficiency limit values of domestic solar water heating systems for heating (see Chapter 5); j) The value of a in the energy efficiency coefficient calculation formula has been changed (see 6.2, Chapter 4 of the.2011 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Standardization Administration. This document was first published in.2011 and this is the first revision. Energy efficiency limit values for domestic solar water heating systems and energy efficiency rating1 ScopeThis document specifies the energy efficiency ratings, technical requirements, testing and calculation methods for domestic solar water heating systems. This document applies to solar water heating systems with a water storage tank volume not exceeding 0.6m3.2 Normative referencesThe contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB 3100 International System of Units and its Application GB/T 12936 Terminology for solar thermal utilization GB/T 18708 Test method for thermal performance of domestic solar water heating systems GB/T 19141 Technical requirements for domestic solar water heating systems3 Terms and DefinitionsThe terms and definitions defined in GB 3100, GB/T 12936, GB/T 18708 and GB/T 19141 and the following terms and definitions apply to this document. 3.1 system;CTP Under the test conditions specified in the standard, the ratio of the measured value of daily heat use of domestic solar water heating system to the value specified in the standard and the average heat The comprehensive coefficient of the ratio of the measured value of the loss factor to the value specified in the standard. 3.2 waterheating system The minimum energy efficiency coefficient allowed for domestic solar water heating systems under the test conditions specified in the standard. 3.3 A grading method to indicate the energy efficiency of domestic solar water heating systems, divided into levels 1, 2 and 3, with level 1 indicating the highest energy efficiency. 4 Energy efficiency levels The energy efficiency levels of domestic solar water heating systems are divided into three levels, and the energy efficiency coefficients of each level should comply with the provisions of Tables 1 to 5. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 26969-2025_English be delivered?Answer: Upon your order, we will start to translate GB 26969-2025_English as soon as possible, and keep you informed of the progress. 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