Patent ID: 6743279
Filing Date: 2004-06-01
Classification: B01D

Abstract:
A method of retrofitting an air handling unit including a casing having an inlet and an outlet, a cooling coil for cooling air, a sump located beneath the cooling coil for collecting water, and a supply air blower for drawing air into the inlet, forcing the air through the cooling coil, and outward through the outlet, the method comprising:installing a spray header inside the duct and adjacent the cooling coil fin spraying a liquid solution onto the cooling coil; and installing a pumping system for drawing the solution from the sump and pumping the solution from the sump to and through the spray header, wherein the spray header flows the solution onto the cooling coil, and the solution flows downward along the cooling coil and into the sump, and the solution treats the air stream forced through the cooling coil.