Ventilating arrangement for buildings, more especially greenhouses

Claim 1

A VENTILATING ARRANGEMENT FOR GLASS WALLED GREENHOUSES AND THE LIKE HAVING A BENCH FOR SUPPORTING PLANTS, WHICH INCLUDES A VENTILATOR MOUNTED IN AN OUTER VERTICAL WALL OPENING ON SAID GREENHOUSE AND HAVING AN INNER WALL AND AN OUTER WALL FIXEDLY SPACED APART TO FORM UPPER AND LOWER INTERCONNECTED APERTURES FOR RECEIVING AIR AND DISCHARGING SUCH AIR INTO THE GREENHOUSE INTERIOR AT THE FLOOR LEVEL BELOW SAID BENCH, SAID VENTILATOR OUTER WALL BEING HINGED AT ITS LOWER EDGE AT THE GREENHOUSE WALL AND SWINGABLE OUTWARDLY, A HEATER IN SAID GREENHOUSE REMOTE FROM SAID VENTILATOR TO CAUSE AN UPWARD FLOW OF AIR ADJACENT A WALL OF THE GREENHOUSE, AND A WATER SPRAY IN SAID VENTILATOR DIRECTED DOWNWARDLY TO ENTRAIN AIR FROM THE UPPER APERTURE THEREOF AND TO DIRECT SUCH AIR IN A STREAM BELOW SAID BENCH TOWARD SAID HEATER.