Hunan Dinghan Environmental Technology Co., Ltd. is a domestic manufacturer of fresh air units, purified fresh air units and air heat recovery processing equipment. Located in Changsha, the birthplace of Chu culture and Huxiang culture, the company has maintained long-term technical cooperation with multiple European and American environmental protection enterprises from Sweden, Denmark, Germany and other countries, as well as domestic universities including Tongji University in Shanghai and Central South University. Covering an area of more than 5,000 square meters, it boasts an annual output of 30,000 sets of heat recovery and fresh air equipment and 6,000 sets of purified fresh air units.

Catering to the installation demands for fresh air equipment both before and after interior renovation, Dinghan Environmental Technology has spent 14 years on independent R&D, developing a full range of heat recovery fresh air equipment such as ceiling-mounted, vertical, rotary wheel and modular-installation models, alongside PM2.5 purified fresh air units designed for compact spaces. These products are widely adopted in commercial fresh air ventilation and healthy green residential sectors. Sold across China and exported to 21 countries and regions, its fresh air ventilators, purified fresh air units and heat exchangers have obtained a number of patent certificates.

The company has set up offices in Changsha, Guangzhou, Chongqing, Guiyang, Wuhan, Jiangxi, Xi’an and other locations, with numerous distributors nationwide. Its product sales network covers all regions across China.