of the invention using a gear system not shown an absorbent pad 76 is disposed in juxtaposed position to indoor heat exchanger 71 when the air conditioner is operating in the heating mode condensate water collected in collection pan 85 under outdoor heat exchanger 84 is pumped to absorbent pad 76 by reversible pump 83 saturating absorbent pad 76 with water this results in humidification of the heated air stream prior to its conveyance to the room for the purpose of increasing the humidity content of the air to the desired level in one embodiment of the invention fresh air is drawn by suction from air inlet ports 88 of exterior unit 41 to the centrifugal fan 73 through fresh air duct 77 disposed in interface unit 24 where the fresh air stream blends with air stream a conveyed through indoor heat exchanger 71 in one embodiment of the invention in the cooling mode reversible pump 83 conveys condensate water from indoor water collection pan 75 through tubes 80 and 86 to the top surface of outdoor heat exchanger 84 resulting in the cooling of outdoor heat exchanger 84 excess condensate water is collected in outdoor unit collection pan 85 and discarded by draining through drain tube 89 a fig8 is a schematic diagram of another preferred embodiment of the invention in which cooled air is conveyed from interior unit 91 to the interior of a first room 96 as well as to a second room 95 duct 90 leading to second room 95 is connected to branched air outlet plenum 94 which is attached to the fan scroll casing 93 of interior unit 91 this permits conveying conditioned air by centrifugal fan 92 to first room 96 through duct 90 a and or.