Patent ID: 8220281

Claim:
A method to reduce condenser unit run time of an air cooled direct expansion air conditioning unit comprising an outside condensing unit comprising a refrigerant cooling coil located behind a grate in a fenestration of an upright panel of a housing for the condensing unit, comprising: installing a seperate inlet air flow guide onto the upright panel of the housing to at least partially cover the fenestration; discharging air from the housing upwardly from a top mounted fan as an upward exhaust stream; forming a plenum by spacing an imperforate upright wall panel of the separate inlet air flow guide outwardly from the grate and connecting the upright wall panel at a top and a bottom thereof to the upright housing panel; positioning a cooling air intake opening at a side end of the plenum; and ducting cooling air from the intake opening horizontally through the plenum and then into the fenestration and across the refrigerant cooling coil behind the grate.