the present invention involves split system air conditioners . specifically , the present invention provides a condenser unit with cross - flow blowers . a single cross - flow blower may be used to draw air through a heat exchanger and expel the air adjacent to a cut - off portion . further , dual cross - flow blowers may be provided to enhance the performance of the condenser unit . the combination of air streams from two cross - flow blowers provide better air circulation through the heat exchangers and a more uniform exhaust stream . the condenser unit is more compact and can be mounted on the wall , on the overhang , or on the top of the building . these various mounting locations take advantage of the air boundary layer near the building and thus the air conditioning system operates more efficiently .