[Ultra-quiet fan duct pipe joining ultra-quiet fan Merchants] ultra-quiet fan pipes for high pressure, high winds, low noise ventilated place. Metal spraying shell, its internal acoustic insulation 50mm thick cotton. Housing and special perforated material can absorb mute broadband noise. Mixed flow impeller are made of high quality plastic. Specially designed impeller and guide vanes makes high-performance fan operation, air pressure, low noise. Bole [Introduction] April 2014, the Group launched a comprehensive China Bole ventilation market development, the establishment of Suzhou Bole Environmental Systems Ltd, the world's top 500 offices located in the Suzhou Industrial Park gathering. From now on, Chinese consumers finally enjoy Bole airy quality products and service opportunities. Blauberg Ventilation Group (Bole ventilation Group), headquartered in Munich, Germany. The company originated in the 1950s in Munich, Germany, a civilian fan factory. Bavaria is located in the birthplace of the magnificent stretches over 1450 kilometers in the foothills of the Carpathian mountains in Europe, far-sighted, mountainous peaks, clear water as a mirror, BLAUBERG, also meaning "Blue Mountains." Bole ventilation Group offers ventilation products and system components for customers worldwide, and provides solutions for building ventilation system an innovative company based on customer requirements. The company continues to expand global operations, respectively, in 1992 and 1994 to establish production and distribution base in Kiev and Moscow, Russia, Ukraine. After a century of precipitation, the company grow to become a production, design, research and development in one of the powerful multinational corporations, products sold in Europe and North America, the business employs more than 6,000 people, more than 600 technical engineers. Bole Group's product range, variety, has Europe's advanced production equipment and management philosophy. Bole ventilation Group's products can be divided into four series: Civil ventilation, industrial ventilation, fresh air heat recovery ventilators and various HVAC end fittings, more than 10,000 kinds of product specifications, and the introduction of an annual average of more than 100 to the market speed new products to enrich the existing product range and variety of products are sold worldwide in 92 countries, with 700 patents, ventilation fully meet the growing needs of the global user differentiated products.