Vietcons.vn Air Conditioning: Vietcons has carried out maintenance and improve HVAC system so far at City Gate Towers Residential Area - 15 Vo Van Kiet P16, District 8, Ho Chi Minh City, and discovered some good applications as follows:1. Currently cleaning without the use of chemicals to prevent dust accumulation -> Cleaning with a digitizer to remove adhesion to help limit adhesion to the ......