Hangzhou Duokai Technology Co., Ltd is located in the Hangzhou Yuhang Economic and Technological Development District. It is one of the top humidifier and dehumidifier manufacturers in Hangzhou city of China. Our company was established in 2013 with registered capital of 5 million RMB. The founder is composed of a group of engineers with 20 years of experience. We specialize in researching, manufacturing, and marketing air-related products, mainly focusing on dehumidifiers and humidifiers.

We are one of the top humidity control products manufactures in mainland China. Such as humidifier, dehumidifier, mister, fogger ect.

The water vapor in the air may vary from space to space. However, undesirable humidity may turn out to have a severely adverse impact on humans, machinery and experimental materials.

TIGA ENGINEERING is an enterprise group which was established in 1998. It manufactures and distributes prepainted steel coils, galvalume steel coil, galvanized steel coil, steel roofing sheet, prefabricated steel structures and decoration materials.

Established in 1988, ASLi (China) Test Equipment Co., Ltd is specialized in manufacturing a variety of quality inspection instruments, testing equipments and other high-tech products which mainly include: Programmable constant Temperature & Humidity Test Chamber, High & Low Temperature Test Chamber, High & low Temperature Testers with Rapid Temperature Change, Walk-In humidity & temperature test chamber, Cool/Thermal shock test chamber, Salt spray chamber, aging tester, drying oven, xenon lights resistant to climate testing machine, UV resistant to climate testing machine, ozone aging test machine, sand and dust testing machine, tension tester, high and low temperature testing machine, servo carton compression tester, mechanical vibration tester and other quality testing instruments. Thanks to several decades of R&D efforts, the company has established itself as a leading provider of testing instruments of the industry, playing a crucial role in the research and development of high-quality and high-value products within the industry.

Nanjing Blue Sky Filter Co., Ltd. Was founded in 2009. Blue Sky manufactures and sells various types of air filters and has expanded the product range to water filtration products, kitchen filtration products, and automotive filtration products etc. The company's products are exported to international markets of 48 countries.