The 95754 is designed for safe effective cleaning of exposed round ventilation duct popularly installed as part of both commercial and residential HVAC systems in environments such as restaurants, airports, supermarkets and retail stores. The 95754 will allow effective cleaning of ductwork up to 6.4m (21 feet) from the ground and is designed so all components lock in place should it become necessary to work from elevated platforms. The entire system from floor to tool locks together for safe use when working overhead or from an elevated platform. Airflow (CFM) is important for effective source capture of debris when cleaning elevated surfaces. Ideally, a vacuum providing 120 CFM is appropriate when cleaning surfaces above 6m (20 feet) to ensure confident collection of debris. Most commercial backpack and canister vacuums equipped for use of 38mm accessories achieve this level of performance.