Holtop is the leading manufacturer in China that specializes in air to air heat recovery equipment.   Since founded in 2002, it is dedicated to the research and technology development of heat recovery ventilation and energy saving air handling equipment for more than 19 years.
 
Holtop headquarters is located at the foot of Beijing Baiwang Mountain, covering area of 30,000 square meters. The manufacturing base is in Beijing's Badaling Economic Development Zone, covering an area of 60 acres. As a well-known manufacturer in the field of heat recovery, its laboratory has passed national authoritative certification, and has a strong R&D team and dozens of national invention patents, participated in the compilation of multiple national standards, and is selected as a National High-Tech Technology Enterprises.
 
Holtop has mastered the core technology of heat recovery, independently developing products like plate and rotary heat exchangers, various heat &energy recovery systems and air handling units. Products have been exported to more than 100 countries and regions. Holtop cooperates with world famous brand or offer OEM service including Hitachi, LG, McQuay, TRANE, Systemair, Aldes, Haier, Gree, MHI Group, Midea, Carrier, etc,and has provided equipment for national projects many times including 2022 Winter Olympics, Wuhan Cabin Hospitals, World Expo Exhibition, etc. Holtop continuously ranks the top in domestic market of heat and energy recovery ventilators.
 
 Product Description
Total heat exchanger is made of ER paper which is featured by high moisture permeability, good air tightness, excellent tear resistance, and aging resistance. The clearance between the fibers is very small, so only the moisture molecules of small diameter can go through, the odor molecules of larger diameter are unable to pass through it. By this means, the temperature and humidity can be recovered smoothly, and prevent the pollutants infiltrating to the fresh air.
 
Working principle
The flat plates and the corrugated plates form channels for fresh or exhaust air stream. When the two air steams
passing through the exchanger crossly with temperature difference, the energy is recovered.
Performance index

E.R. paper performance introduction

Heat exchange paper: for heat and moisture exchange, the main performance standards are diathermancy, moisturepenetrability and air permeability.

Corrugated paper: to construct the frame for the heat exchanger, flowing passages of the air stream.