Air conditioning units

Claim 1

IN COMBINATION WITH A BUILDING HAVING AN EXTERIOR WALL WITH SPACED-APART OUTDOOR AIR INLET MEANS AND EXHAUST MEANS THEREIN; AN AIR CONDITIONING UNIT WITHIN SAID BUILDING AND HAVING A CASING WITH WALLS FORMING A FIRST COMPARTMENT, FORMING A SECOND COMPARTMENT ALONGSIDE SAID COMPARTMENT, FORMING A THIRD COMPARTMENT BELOW SAID COMPARTMENTS, AND FORMING A RECIRCULATED AIR PASSAGE HAVING AN OUTLET WITHIN SAID THIRD COMPARTMENT; SAID FIRST COMPARTMENT HAVING AN AIR INLET OPENING, HAVING MEANS TO CONNECT SAID AIR INLET OPENING TO SAID INLET MEANS, HAVING AN OUTDOOR AIR OUTLET OPENING ABOVE SAID INLET OPENING, HAVING MEANS TO CONNECT SAID AIR OUTLET OPENING TO SAID EXHAUST MEANS, CONTAINING AN OUTDOOR AIR FAN HAVING ITS OUTLET CONNECTED TO SAID OUTLET OPENING, CONTAINING A CONDENSER COIL AND A REFRIGERANT COMPRESSOR, AND HAVING A SECOND OUTDOOR AIR OUTLET OPENING BELOW SAID FAN; SAID SECOND COMPARTMENT CONTAINING A FURNACE COIL COMPRISING A PLURALITY OF TUBES HAVING UPPER AND LOWER ENDS, CONTAINING A BONNET ENCLOSING SAID UPPER ENDS, CONTAINING A COMBUSTION AIR CHAMBER ENCLOSING SAID LOWER ENDS, CONTAINING A RECIRCULATED AIR OPENING AT ONE SIDE OF SAID FURNACE COIL, AND CONTAINING A CONDITIONED AIR OUTLET AT THE OPPOSITE SIDE OF SAID FURNACE COIL; SAID THIRD COMPARTMENT CONTAINING AN EVAPORATOR COIL HAVING ONE SIDE EXTENDING ACROSS SAID OUTLET OF SAID PASSAGE, AND CONTAINING AN INDOOR AIR FAN AT THE OPPOSITE SIDE OF SAID EVAPORATOR COIL, SAID INDOOR FAN HAVING ITS INLET WITHIN SAID THIRD COMPARTMENT AND HAVING ITS OUTLET CONNECTED TO SAID RECIRCULATED AIR OPENING; A COMBUSTION AIR FAN CONNECTED TO DRAW OUTDOOR AIR IN THROUGH SAID INLET MEANS AND SAID INLET OPENING INTO SAID FIRST COMPARTMENT, THROUGH SAID SECOND OPENING, AND TO SUPPLY THE INDRAWN AIR INTO SAID COMBUSTION CHAMBER; A DUCT CONNECTING SAID BONNET TO SAID EXHAUST MEANS, AND MEANS FOR COOLING THE FLUE GAS PASSING THROUGH SAID DUCT WITH OUTDOOR AIR DRAWN IN BY SAID COMBUSTION AIR FAN, REFRIGERANT EXPANSION MEANS, SAID COMPRESSOR AND SAID EVAPORATOR AND CONDENSER COILS BEING CONNECTED IN A REFRIGERATION CIRCUIT WITH SAID EXPANSION MEANS CONNECTED IN SAID CIRCUIT BETWEEN SAID CONDENSER AND EVAPORATOR COILS.