Coils are meant to pass large quantities of air. The patented CC61 coil washing system uses approx. 65% compressed air and 35% water which flows through the entire coil - even chilled water coils. The nozzle now reaches the entire surface area of the coil. Soap is now "injected " deep into the coil enhancing air flow, and heat transfer, while cutting labor time to clean them. The operator can comfortably be seated in many instances. The CC61 cleaning system is truly designed to work with the coil design.