GB/T 33658-2025Thermal comfort requirements and evaluation for indoor environment (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents". Drafting.

This document supersedes GB/T 33658-2017 "Requirements and Evaluation Methods for Indoor Human Thermal Comfort Environment" and is consistent with GB/T 33658-2017.

Aside from structural adjustments and editorial changes, the main technical changes are as follows.

— The formula for calculating the evaluation score of vertical air temperature difference has been changed (see 4.1.3, 2017 version 4.1.3);

— The threshold for the local equivalent temperature of the warm-body dummy has been increased to avoid localized discomfort in the human body (see 4.2.2);

— The formula for calculating the evaluation score of the warm-body dummy has been changed (see 4.2.1, 4.2.3, and 4.2 in the 2017 version);

— The weights of comfort indicators for both cooling and heating modes have been changed (see 6.1, 2017 version of 6.1).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed and is under the jurisdiction of the National Technical Committee on Ergonomics Standardization (SAC/TC7).

This document was drafted by: China National Institute of Standardization, Qingdao Haier Air Conditioner Co., Ltd., and China Energy Efficiency Technology (Beijing) Co., Ltd.

Guangdong Midea Refrigeration Equipment Co., Ltd., Hisense Air Conditioning Co., Ltd., Guangdong Midea HVAC Equipment Co., Ltd., Qingdao Hisense Hitachi Air Conditioning Systems Limited Liability Company, Xiaomi Smart Home Appliances (Wuhan) Co., Ltd., Aomeisen Intelligent Equipment Co., Ltd., Beijing University of Aeronautics and Astronautics, AUX Air Conditioning TCL Air Conditioning Co., Ltd., Daikin (China) Investment Co., Ltd., TCL Air Conditioning (Zhongshan) Co., Ltd., Shanghai Mitsubishi Electric & Shangling Air Conditioning Electrical Appliances Co., Ltd., Guangzhou Panasonic Air Conditioner Co., Ltd., Guangdong Meibo Refrigeration Equipment Co., Ltd., Sichuan Changhong Air Conditioning Co., Ltd., Anhui Yang Zijing Air Conditioning Co., Ltd., Guangdong Zhige Air Conditioning Co., Ltd., Guangdong Ouke Air Conditioning & Refrigeration Co., Ltd., Foshan Yunmi Electric Technology Co., Ltd.

The company, Zhuhai Sanyou Environmental Technology Co., Ltd., Qingdao Haier (Jiaozhou) Air Conditioner Co., Ltd., Inner Mongolia University of Technology, and Guotou Zhongbiao Quality Base Infrastructure Research Institute Co., Ltd., Qingdao University of Technology, Weikai Testing Technology Co., Ltd., Beijing Guanghui Derun Aviation Technology Co., Ltd., Zhongjia Beijing Institute of Testing and Certification Co., Ltd.

The main drafters of this document are: Wang Rui, Zhao Chaoyi, Lao Chunfeng, Hu Huimin, Qi Yun, Hu Siter, Qiu Yifen, Feng Chaoqing, Bie Qingfeng, and Ge Meng.

Jiang Yu, Zhang Wenqiang, Shan Lianyu, Long Xiaobin, Du Wenchao, Yan Liang, Gao Xu, Lu Dongming, Hu Wuqiang, Yu Fangwen, Li Leixin, Zeng Xiaocheng, Hu Gen Li Shigang, Chen Xiaoping, Huang Jianliang, Li Wei, Gao Jianfeng, Zhang Xilong, Wei Bo, Weng Junjie, Yang Shuang, Guo Xin, Zheng Chongkai, Chen Shouhai, Zhang Yiwen, Wang Mei Tong Weicheng, Cai Shi, Jia Shuitian, Yang Mingjie, Fu Bo, Zhao Haidong, Chen Junzhi, Liang Tao, Zhang Jing, Zhang Zhupeng, Li Zhurong, Tang Weixin, Li Jing, Li Jianfeng Chen Shuming, Wang Bo, Kang Ludi, Mei Zhiguang, and Lü Fujun.

This document was first published in 2017, and this is its first revision.

1 Scope

This document specifies the technical requirements for indoor thermal comfort environments and describes the corresponding evaluation methods.

This document applies to the design and evaluation of indoor thermal environments under moderate thermal conditions in daily work and life, and can also be used for room air conditioning.

System thermal comfort evaluation.

2 Normative references

GB/T 7725

GB/T 40288

ISO 7730

3 Terms and Definitions

The terms and definitions defined in GB/T 40288 and ISO 7730, as well as the following terms and definitions, apply to this document.