Paulair (Beijing) Passive Building Technology Co., Ltd. is a composite high-tech enterprise that integrates research and development, design, production, and sales. We provide users with energy-saving building fresh air energy and environmental control integrated machines, fresh air heat recovery units, five constant all air units, fresh air conditioning integrated machines, dual cold source fresh air dehumidification integrated machines, fresh air ventilation units, medical constant temperature and humidity units, heat pump dual supply units, high-end household commercial oxygen generators, integrated motherboard development, passive door and window systems, whole house insulation systems, air tightness treatment and other services. The company began introducing products and technologies related to Italy and Germany in 2013, focusing on fresh air purification and intelligent HVAC specialties. The products cover various types such as household and medical use, and have a high reputation in the domestic market. The company has more than 20 patented technologies and has cooperated with multiple universities in industry university research. It has participated in the compilation of national standards for near zero energy consumption, passive fresh air technology standards, and technical guidelines for residential fresh air systems issued by the Ministry of Housing and Urban Rural Development. Our products have obtained the Kangju certification from the Ministry of Housing and Urban Rural Development and the CE safety certification from the European Union.