Air and light distributor unit

Claim 1

IN COMBINATION WITH A CEILING OF A SPACE TO BE ILLUMINATED AND VENTILATED, A FALSE CEILING SPACED BELOW SAID CEILING, AN AIR AND LIGHT DISTRIBUTOR UNIT IN SAID FALSE CEILING COMPRISING A TROFFER LIGHT HOUSING HAVING UPWARDLY AND INWARDLY EXTENDING INNER SIDE WALL PORTIONS FORMING A LIGHT TROUGH ABOVE THE LEVEL OF SAID FALSE CEILING, A REFLECTOR EXTENDING ALONG SAID HOUSING ALONG THE UPPER MARGINS OF SAID INNER WALL PORTIONS AND HAVING EDGE PORTIONS SPACED INWARDLY FROM SAID INNER WALL PORTIONS TO FORM DOWNWARDLY OPENING AIR PASSAGEWAYS, ELONGATED FLUORESCENT TUBES EXTENDING ALONG SAID HOUSING BENEATH SAID REFLECTOR, A PLENUM CHAMBER ABOVE SAID REFLECTOR, AN AIR INLET LEADING INTO SAID PLENUM CHAMBER FROM THE TOP THEREOF AT SUBSTANTIALLY THE TRANSVERSE CENTER OF SAID PLENUM CHAMBER, A PLURALITY OF VERTICALLY EXTENDING VANES EXTENDING ACROSS SAID AIR PASSAGEWAYS, THE VANES ON OPPOSITE SIDES OF THE TRANSVERSE CENTER OF SAID PLENUM CHAMBER BEING INCLINED IN OPPOSITE DIRECTIONS TOWARDS THE OPPOSITE ENDS OF SAID PLENUM CHAMBER AND REDUCING THE ENDWISE VELOCITY COMPONENTS OF THE AIR AND DIRECTING THE AIR FOR DISCHARGE DOWNWARDLY THROUGH SAID AIR PASSAGEWAYS IN A GENERALLY STRAIGHT DOWNWARDLY DIRECTION, AND PARALLEL BAFFLES EXTENDING VERTICALLY ALONG THE INNER SIDES OF THE CENTRAL VANES OF SAID OPPOSITELY INCLINED VANES AND DEFLECTING THE STREAM OF AIR ENTERING SAID PLENUM CHAMBER AND RESTRICTING THE STREAM OF AIR BOUNCING FROM THE BOTTOM OF SAID PLENUM CHAMBER, TO PREVENT THE CONVERSION OF THE STATIC HEAD OF AIR INTO A VELOCITY HEAD.