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Caleffi’s 5021 Series automatic air vents will remove air that accumulates in HVAC systems without the need for manual intervention. The vents lengthen the life and enhance the performance of the system by reducing the effects of corrosion because of oxygen, pockets of air trapped in heating emitters and cavitation in the circulation pumps. A check valve on the 5021 Series allows for easy replacement of the air vent without purging the system.
