Air conditioning system

Claim 1

IN AN AIR CONDITIONING SYSTEM IN A BUILDING HAVING AT LEAST ONE ROOM, SAID ROOM HAVING A CEILING AND ENCLOSED SPACE ABOVE THE CEILING, THE COMBINATION OF FORCED AIR HEATING MEANS HAVING A SUCTION SIDE AND A DISCHARGE SIDE, FORCED AIR COOLING MEANS ALSO HAVING A SUCTION SIDE AND A DISCHARGE SIDE, HEATING DUCT MEANS CONNECTED AT ONE END THEREOF WITH THE DISCHARGE SIDE OF SAID HEATING MEANS AND PROCEEDING TO AND TERMINATING AT THE OTHER END IN A PERIMETER OUTLET TO SAID ROOM, AIR RETURN DUCT MEANS CONNECTING SAID ENCLOSED SPACE WITH THE SUCTION SIDE OF SAID HEATING MEANS THEREBY TO IMPOSE SUCTION TO SAID SPACE, HEAT GENERATING LIGHTING MEANS POSITIONED IN AN OPENING IN THE CEILING ESTABLISHING COMMUNICATION BETWEEN SAID SPACE AND THE INTERIOR OF SAID ROOM, SAID LIGHTING MEANS CONSTRUCTED TO PERMIT THE FLOW OF AIR FROM SAID ROOM INTO SAID SPACE AND TO GUIDE SAME IN HEAT EXCHANGE RELATIONSHIP WITH SAID LIGHTING MEANS, COOLING DUCT MEANS SEPARATE FROM SAID HEATING DUCT MEANS AND CONNECTED WITH THE DISCHARGE SIDE OF SAID FORCED AIR COOLING MEANS, SAID COOLING DUCT MEANS RUNNING TO AND DISCHARGING THROUGH OUTLETS TO THE INTERIOR OF SAID ROOM, AND AIR RETURN DUCT MEANS CONNECTED AT ONE END WITH AN OPENING TO THE INTERIOR OF SAID ROOM AND RETURNING TO AND CONNECTED AT ITS OTHER END WITH THE SUCTION SIDE OF SAID FORCED AIR COOLING MEANS TO PROVIDE A CONFINED FLOW PATH FOR RETURN AIR FROM SAID ROOM TO SAID FORCED AIR COOLING MEANS AND OPERABLE TO MAINTAIN THE RETURN AIR FROM SAID COOLING MEANS SEGREGATED FROM THE RETURN AIR BEING RETURNED TO THE HEATING MEANS.