Before October, 2016, the Messe Frankfurt of Shanghai Project was successfully finished. During this project, the Messe Frankfurt Shanghai company installed Enchoy EFU-650C series, according to testing, the oxygen quantity and concentration of PM2.5 reached health standards of international. 650 means the machine’s size, it’s very suitable for offices and exhibition hall. After installation, the purification area is extended through pipelines, any harmful air, dust and smoke can be rapidly exhausted outside, and any ventilation problem can be solved well.