Recessed roof-mounted heater

Claim 1

IN AN AIR-CONDITIONING APPARATUS, IN COMBINATION: A BUILDING INCLUDING A ROOF HAVING AN OPENING THEREIN; A MAIN HOUSING INCLUDING LATERAL UPRIGHT WALLS EXTENDING THROUGH SAID OPENING, FITTED TO THE MARGINS THEREOF, AND SEALED TO SAID ROOF, SAID HOUSING HAVING AN UPPER PORTION PROJECTING ABOVE SAID ROOF AND PROVIDED WITH APERTURES FOR INTAKE AND DISCHARGE OF EXTERNAL AIR FROM ATMOSPHERE OUTSIDE SAID BUILDING INTO SAID UPPER HOUSING PORTION, SAID HOUSING HAVING A LOWER PORTION PROJECTING BENEATH SAID ROOF INTO A UPPER AREA WITHIN SAID BUILDING; AN AIRCONDITIONING MEANS WITHIN SAID HOUSING AND EXTENDING INTO SAID LOWER PORTION THEREOF; MEANS WITHIN SAID HOUSING FOR DIRECTING SAID EXTERNAL AIR TO SAID AIR-CONDITIONING MEANS FOR AFFECTING THE OPERATION THEREOF AND FOR THEN RETURNING IT TO EXTERNAL ATMOSPHERE; AIR DISTRIBUTION AND INTAKE DUCTS COMMUNICATING WITH SAID LOWER HOUSING PORTION, FOR CIRCULATING IN HEAT-TRANSFER RELATION TO SAID AIRCONDITIONING COMPONENT, A BODY OF AIR WHICH THEREBY BECOMES CONDITIONED; AND MEANS WITHIN SAID HOUSING FOR DIRECTING SAID BODY OF AIR PAST SAID AIR-CONDITIONING MEANS IN A CIRCULATION PATH SEPARATE FROM THAT OF SAID EXTERNAL AIR, SAID APPARATUS INCLUDING AN INSULATING JACKET SURROUNDING AT LEAST THREE SIDES OF SAID AIR-CONDITIONING MEANS AND SPACED FROM THE SIDE WALLS AND AN END WALL OF SAID HOUSING, THEREBY DEFINING AIR PASSAGE COMMUNI CATING AT THEIR UPPER ENDS WITH SAID ATMOSPHERE INTAKE APERTURES, AND COMMUNICATING AT THEIR LOWER ENDS WITH SAID AIR-CONDITIONING MEANS.