GB 38448-2025 Minimum allowable values and grades of the energy efficiency and water efficiency for smart toilets
1 Scope
This document specifies the grades of the energy efficiency and water efficiency, and technical requirements, and describes the corresponding test methods for smart toilets.
This document is applicable to smart toilets installed on cold water pipeline in buildings.
2 Normative references
The following normative documents contain provisions 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 (including any amendments) applies.
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 9195 Terms and classification of building and sanitary ceramics
GB 25502 Minimum allowable values of water efficiency and water efficiency grades for water closets
GB/T 34549 Sanitary ware - Smart toilet
3 Terms and definitions
For the purpose of this document, the terms and definitions given in GB/T 9195, GB 25502 and GB/T 34549 and the following apply.
3.1
smart toilet
toilet that is controlled by an electromechanical system or program to complete at least one or more functions including warm water cleaning (e.g., buttock cleaning and women’s cleaning), and seat heating
Note 1: This includes both integral smart toilets and split smart toilets.
Note 2: The warm water cleaning function includes the self-cleaning function of nozzle.
3.2
energy consumption per unit cycle
energy consumption of the smart toilet during one test cycle (1.5h) under the test conditions defined in this document
3.3
standby mode(s)
when connected to the main power, the smart toilet provides one or more of the following user-oriented functions or protection functions, which is a continuous mode for any product
——trigging other modes (including activation or deactivation of active mode) by remote switches (including remote control), internal sensors and timers;
——continuous function: information or state display including clock;
——continuous function: sensor-based function
[Source: GB/T 35758-2017, 3.6, modified]
3.4
standby power
average power of the smart toilet in standby mode
3.5
minimum allowable values of the energy efficiency and water efficiency for smart toilets
maximum energy consumption per unit cycle, maximum average water consumption for cleaning (if applicable), maximum average water consumption for flushing (if applicable), maximum water consumption for full flushing (if applicable) of double-flush smart toilet, and maximum water consumption for half flushing (if applicable) of double-flush smart toilet allowed for smart toilets under the test conditions specified in this document
4 Grades of the energy efficiency and water efficiency for smart toilets
The energy efficiency and water efficiency for smart toilets are classified into 3 grades, with Grade 1 as the highest. The energy consumption per unit cycle, average water consumption for cleaning (if applicable), average water consumption for flushing (if applicable), water consumption for full flushing of double-flush smart toilet (if applicable), and water consumption for half flushing of double-flush smart toilet (if applicable) of each energy efficiency and water efficiency grade shall meet those specified in Table 1. The determination shall be made based on the lowest grade achieved for each of the indexes specified in Table 1.
Table 1 Indexes for grades of the energy efficiency and water efficiency for smart toilets
Grades of the energy efficiency and water efficiency for smart toilets Grade 1 Grade 2 Grade 3
Energy consumption per unit cycle, kW·h Ordinary type With seat heating function ≤0.030 ≤0.038 ≤0.048
Without seat heating function ≤0.010 ≤0.018 ≤0.026
Simple type — ≤0.022 ≤0.028 ≤0.038
Average water consumption for cleaning/L ≤0.30 ≤0.46 ≤0.60
*Average water consumption for flushing/L In accordance with the requirements of Grade 1 indexes in GB 25502 In accordance with the requirements of Grade 2 indexes in GB 25502 In accordance with the requirements of Grade 3 indexes in GB 25502
* Water consumption for full flushing of dual-flush smart toilets/L
* Water consumption for half flushing of dual-flush smart toilets/L
Note 1: The average water consumption for flushing is applicable to single-flush smart toilets and double-flush smart toilets.
Note 2: "*" is applicable to integral smart toilets.
Note 3: Ordinary smart toilet has warm water cleaning function while simple smart toilet does not.
5 Technical requirements
5.1 Minimum allowable values of the energy efficiency and water efficiency
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Grades of the energy efficiency and water efficiency for smart toilets
5 Technical requirements
6 Test methods
7 Document implementation
Annex A (Normative) Test methods
Bibliography
GB 38448-2025 Minimum allowable values and grades of the energy efficiency and water efficiency for smart toilets
1 Scope
This document specifies the grades of the energy efficiency and water efficiency, and technical requirements, and describes the corresponding test methods for smart toilets.
This document is applicable to smart toilets installed on cold water pipeline in buildings.
2 Normative references
The following normative documents contain provisions 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 (including any amendments) applies.
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 9195 Terms and classification of building and sanitary ceramics
GB 25502 Minimum allowable values of water efficiency and water efficiency grades for water closets
GB/T 34549 Sanitary ware - Smart toilet
3 Terms and definitions
For the purpose of this document, the terms and definitions given in GB/T 9195, GB 25502 and GB/T 34549 and the following apply.
3.1
smart toilet
toilet that is controlled by an electromechanical system or program to complete at least one or more functions including warm water cleaning (e.g., buttock cleaning and women’s cleaning), and seat heating
Note 1: This includes both integral smart toilets and split smart toilets.
Note 2: The warm water cleaning function includes the self-cleaning function of nozzle.
3.2
energy consumption per unit cycle
energy consumption of the smart toilet during one test cycle (1.5h) under the test conditions defined in this document
3.3
standby mode(s)
when connected to the main power, the smart toilet provides one or more of the following user-oriented functions or protection functions, which is a continuous mode for any product
——trigging other modes (including activation or deactivation of active mode) by remote switches (including remote control), internal sensors and timers;
——continuous function: information or state display including clock;
——continuous function: sensor-based function
[Source: GB/T 35758-2017, 3.6, modified]
3.4
standby power
average power of the smart toilet in standby mode
3.5
minimum allowable values of the energy efficiency and water efficiency for smart toilets
maximum energy consumption per unit cycle, maximum average water consumption for cleaning (if applicable), maximum average water consumption for flushing (if applicable), maximum water consumption for full flushing (if applicable) of double-flush smart toilet, and maximum water consumption for half flushing (if applicable) of double-flush smart toilet allowed for smart toilets under the test conditions specified in this document
4 Grades of the energy efficiency and water efficiency for smart toilets
The energy efficiency and water efficiency for smart toilets are classified into 3 grades, with Grade 1 as the highest. The energy consumption per unit cycle, average water consumption for cleaning (if applicable), average water consumption for flushing (if applicable), water consumption for full flushing of double-flush smart toilet (if applicable), and water consumption for half flushing of double-flush smart toilet (if applicable) of each energy efficiency and water efficiency grade shall meet those specified in Table 1. The determination shall be made based on the lowest grade achieved for each of the indexes specified in Table 1.
Table 1 Indexes for grades of the energy efficiency and water efficiency for smart toilets
Grades of the energy efficiency and water efficiency for smart toilets Grade 1 Grade 2 Grade 3
Energy consumption per unit cycle, kW·h Ordinary type With seat heating function ≤0.030 ≤0.038 ≤0.048
Without seat heating function ≤0.010 ≤0.018 ≤0.026
Simple type — ≤0.022 ≤0.028 ≤0.038
Average water consumption for cleaning/L ≤0.30 ≤0.46 ≤0.60
*Average water consumption for flushing/L In accordance with the requirements of Grade 1 indexes in GB 25502 In accordance with the requirements of Grade 2 indexes in GB 25502 In accordance with the requirements of Grade 3 indexes in GB 25502
* Water consumption for full flushing of dual-flush smart toilets/L
* Water consumption for half flushing of dual-flush smart toilets/L
Note 1: The average water consumption for flushing is applicable to single-flush smart toilets and double-flush smart toilets.
Note 2: "*" is applicable to integral smart toilets.
Note 3: Ordinary smart toilet has warm water cleaning function while simple smart toilet does not.
5 Technical requirements
5.1 Minimum allowable values of the energy efficiency and water efficiency
Contents of GB 38448-2025
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Grades of the energy efficiency and water efficiency for smart toilets
5 Technical requirements
6 Test methods
7 Document implementation
Annex A (Normative) Test methods
Bibliography
