Supply plenum upon arrival, main agree with customer start pumping down unit to take air handler out of closet tear out all ductwork in closet repair return underneath pictures taken of work completed. Paint closet with kills mildew resistant paint let dry, build risers and Plenum offset clean unit. Put unit back in rewire everything seal everything nitrogen test copper line set 400 psi for 30 minutes vacuum down to 500 µm start up check to factory spec 22° split everything is cooling and is complete job done