Standard No.:	GB/T 47622-2026
English Name:	General technical requirements of indoor thermostats
Chinese Name:	室内温度控制器通用技术条件
Chinese Classification:	P48    Ventilation and air conditioning engineering
Professional Classification:	GB    National Standard
ICS Classification:	91.140.30 91.140.30    Ventilation and air-conditioning systems 91.140.30
Source Content Issued by:	SAMR, SAC
Issurane Date:	2026-05-25
Implementation Date:	2026-12-1
Status:	to be valid
Target Language:	English
File Format:	PDF
Word Count:	9500 words
Translation Price(USD):	285.0
Delivery:	via email in 1~3 business day

GB/T 47622-2026 General technical requirements of indoor thermostats English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS National Standard of the People's Republic of China ‌GB/T 47622-2026 General technical requirements of indoor thermostats 室内温度控制器通用技术条件 Issue date: 2026-01-28 Implementation date: 2027-02-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Classification and marking 5 General requirements 6 Technical requirements 7 Test methods 8 Inspection rules 9 Marking, packaging, transportation and storage Annex A (informative) Common graphical symbol markings for thermostats Annex B (informative) Example of Modbus protocol register allocation for thermostats Bibliography Indoor thermostats — General technical specifications 1 Scope This document specifies the classification and marking, general requirements and technical requirements for indoor thermostats (hereinafter referred to as "thermostats"), describes the test methods, and specifies the inspection rules, marking, packaging, transportation and storage. This document is applicable to the production and inspection of indoor thermostats used for temperature control of terminal equipment of comfort heating, ventilation and air-conditioning (HVAC) systems in civil or industrial buildings. This document is not applicable to the production and inspection of indoor thermostats that have the function of linked control of other HVAC equipment. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 191, Packaging — Pictorial marking for handling of goods GB/T 2423.1, Environmental testing for electric and electronic products — Part 2: Test methods — Tests A: Cold GB/T 2423.2, Environmental testing for electric and electronic products — Part 2: Test methods — Tests B: Dry heat GB/T 2423.3, Environmental testing — Part 2: Test methods — Test Cab: Damp heat, steady state GB/T 2423.7, Environmental testing — Part 2: Test methods — Test Ec: Rough handling shocks, primarily for equipment-type specimens GB/T 2423.10, Environmental testing — Part 2: Test methods — Test Fc: Vibration (sinusoidal) GB/T 2828.1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection GB/T 5296.2, Instructions for use of products of consumer interest — Part 2: Household and similar electrical appliances GB/T 6388, Transport package shipping mark GB/T 9254.1, Information technology equipment, multimedia equipment and receivers — Electromagnetic compatibility — Part 1: Emission requirements GB/T 14536.1-2022, Automatic electrical controls — Part 1: General requirements GB/T 14536.10, Automatic electrical controls — Part 10: Particular requirements for temperature sensing controls GB/T 21711.1, Electromechanical elementary relays — Part 1: General and safety requirements GB 26572, Requirements of concentration limits for certain restricted substances in electrical and electronic products GB/T 31459, Safety requirements for temperature control systems for floor heating devices for household and similar use 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 indoor thermostat An integrated electronic automatic control device that controls indoor dry-bulb temperature based on a setpoint temperature. 3.2 networked indoor thermostat A thermostat that has network communication capability. Note: Hereinafter referred to as "networked thermostat". 3.3 programmable indoor thermostat A thermostat that has at least the function of editing schedules and setting operating modes and setpoint temperatures for different time periods. Note: Hereinafter referred to as "programmable thermostat". 3.4 setpoint temperature The target temperature value for control set on the thermostat. 3.5 rated load The load value of the thermostat as specified by the manufacturer. 3.6 rated condition The operating condition of the thermostat under rated load. 3.7 operation state The condition in which the thermostat is operating normally. Note: Includes rated condition, energy-saving condition, etc. 3.8 non-operation state The condition in which the thermostat is powered normally but does not perform temperature control functions. 3.9 operation mode The working mode in which the thermostat operates under the operation state. Note: Includes ventilation mode, cooling mode, heating mode, dehumidification mode, etc. 4 Classification and marking 4.1 Classification 4.1.1 Thermostats may be classified by the type of equipment to which they are applicable as: two-pipe fan coil unit type, four-pipe fan coil unit type, electric floor heating type, water floor heating type, water radiant heating and cooling type, and other types, with designations 2F, 4F, EFH, WFH, WHC and O, respectively. 4.1.2 Thermostats may be classified by heating and cooling function type as: heating-only type, cooling-only type, and heating and cooling type, with designations H, C and HC, respectively. 4.1.3 Thermostats may be classified by networking type as: networked type and stand-alone type, with designations NW and SA, respectively. 4.1.4 Thermostats may be classified by communication type as: wired communication type and wireless communication type, with designations W and WL, respectively. 4.1.5 Thermostats may be classified by programmability type as: programmable type and non-programmable type, with designations P and NP, respectively. 4.2 Marking The marking method for thermostats is as follows: Example: A thermostat for two-pipe fan coil unit, cooling-only, networked, wired, programmable shall be marked as: TS-2F-C-NW-W-P 5 General requirements 5.1 Basic provisions 5.1.1 Thermostats shall be manufactured in accordance with drawings and technical documents approved by prescribed procedures. 5.1.2 Thermostats shall be powered by AC or DC power supplies. AC power supplies shall be compatible with 24 V or 220 V, 50 Hz; DC power supplies shall be compatible with 12 V, 24 V or 48 V. Thermostats powered by batteries shall be compatible with 1.5 V or 3 V. Note: This requirement does not apply to products embedded in other equipment that also have thermostat functionality. 5.1.3 For general use locations, the degree of protection of the thermostat shall not be less than IP20. When used in kitchens, bathrooms and other locations with higher humidity, the degree of protection of the thermostat shall not be less than IP24, and protective measures such as waterproof covers may be used to achieve this level of protection. 5.1.4 Thermostats shall be installed at a height of 1.2 m to 1.5 m above the floor, in a position that is convenient for operation and capable of accurately reflecting the temperature of the controlled area. 5.2 Materials 5.2.1 The heat resistance and fire resistance of materials such as the enclosure assembly, display screen, circuit board assembly, wiring harness assembly and fasteners of thermostats shall comply with the relevant provisions of GB/T 14536.1-2022, and the content of restricted substances shall comply with the relevant provisions of GB 26572. 5.2.2 The metal parts of thermostats shall comply with the relevant provisions on corrosion resistance in GB/T 14536.1-2022. 5.2.3 The components and materials of thermostats should preferably be manufactured using renewable resources. 5.3 Specifications and structure 5.3.1 The structural design of thermostats shall comply with the relevant provisions of GB/T 14536.1-2022. 5.3.2 The external dimensions of the flush-mounting panel, adjusting plate or mounting box of thermostats shall be compatible with the mounting requirements of 86-type mounting boxes. 5.3.3 The terminals and ends of thermostats shall meet the requirements of Clause 11 of GB/T 14536.1-2022. 5.3.4 The components of thermostats shall be securely fastened without looseness, and the operation of movable parts such as buttons shall be responsive and reliable. 5.4 Safety