Abstract: In an air conditioning system having a condensate tube interconnecting a condensate pan and a trap, a vent is provided in the condensate tube for relieving any internal pressure which would otherwise cause a restriction of condensate flow within the condensate tube.

Abstract: A heat exchange unit for use with an air conditioning system having an enclosure defining an opening, a heat exchanger within the enclosure and a grille adapted mounted to the enclosure at the opening, the grille having segments extending between a solid center portion of the grille and an edge portion such that slots are created between adjacent segments. A fan motor is suspended from the center of the grille and a special louver segment is created extending from the fan motor to the edge portion. This louver segment includes inclined segments which coact with a wire guide for forming a wire securing cavity extending from the fan motor to the control section of the unit. This combination louver configuration and wire guide acts to secure the wire in a preselected position.