The 24th Tehran International Exhibition of Building Installations, Cooling and Heating Systems 1404 (2025) was held from October 7 to October 10 at the Permanent Site of Tehran International Exhibitions. This exhibition, which was not expected to be very popular after the recent events in Iran, was well received by domestic manufacturers and visitors. The exhibition consisted of 7 main sections: 1- Heating Systems and Equipment 2- Air Conditioning Ventilation Systems and Equipment 3- Refrigeration Systems and Components 4- Building Installation Systems and Components 5- Pipes and Fittings 6- Electronic Systems and Building Automation Components 7- Service Groups and Companies GreenZist startup, as one of the players in the energy industry in the country, also attended this exhibition and formed good relationships with the companies present. We consider it necessary to thank all the organizations and individuals who have played a role in organizing this exhibition and other similar exhibitions.