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Beijing HOLTOP Air Conditioning Co., Ltd. Has been specialized in air-to-air heat recovery and ventilation industry for more than 15 years. We have become one of the most biggest and famous one among China native similar enterprises. Headquarter based in Zhong Guancun North area of SCIENCE PARK, Beijing. The construction area covers 30, 000 m2, including plant area 20, 000 m2 and office building area 10, 000 m2. Yearly production capability reaches 100, 000 heat recovery equipments. HOLTOP independent developed high efficiency heat wheel, air to air plate heat exchanger, heat recovery AHU, HRV, ERV, fan coil etc. Products are trusted by native and overseas customers because of advanced technology, good quality and service. Among these products, HRV/ERV and rotary/plate heat exchanger have been maintaining market share first for many years. HOLTOP sales and service spread all over China, successively set up subsidiaries and offices in Shanghai, Tianjin, Shenzhen, Jinan, Shenyang, Xian, Wuhan etc. 21 main cities. With constantly improved R&D ability, more frequently technology communication, products main performance index reaches advanced level in international, HOLTOP export products to Europe, Middle East, Japan, Korea, Southeast Asia, Africa, Taiwan etc. 28 countries, exportation trend gradually become stronger.