Dustraction are in a position to offer a full test and examination scheme to establish initial air flow rates, volumes and system pressures, including a CAD diagram in line with regulation 9. The test and examination scheme forms a comprehensive after sales service and also includes a maintenance scheme. The scheme is an integral part of a complete product and technical expertise package in dust control. To comply with COSHH codes and retain effective working order, all equipment should be serviced regularly, In the case of exhaust ventilation this should be examined and tested every 14 months. A record or log book should be maintained for test results and correct data comparison.