Abstract: A low profile room air conditioner. The low profile is achieved in part by the arrangement of components in its outside section. The fan that moves air through the outside section is of the axial flow type mounted so that its axis of rotation is substantially perpendicular to the base of the enclosure and so that the fan draws air into the outside section through the top of the enclosure. Air discharges from the outside section through an air discharge on a side of the enclosure. Louvers at the air discharge direct the air exiting the enclosure away from the air inlet. A slinger directs droplets of condensate drained from the inside refrigerant-to-air heat exchanger into the air flowing through the outside section. The air carries the condensate on to the outside refrigerant-to-air heat exchanger where it evaporates. The air flow carries the resultant water vapor out of the outside section.

Abstract: A plate fin (12) for a plate fin and tube heat exchanger (10) used in an application in which the tubes run generally horizontally and in which condensation of a vapor entrained in the air flowing over and around the plate fins and tubes is likely to occur. The plate fin is configured to promote efficient and effective drainage of condensate that forms on the fin during heat exchanger operation. The fin is sinusoidally corrugated and has raised lance elements. There is a corrugated drainage channel section (32) between each vertical pair of adjacent fin collars (17). The drainage channel sections provide a path for condensate to run down the vertical plate fin to the bottom of the heat exchanger.