Electrically heated sauna installation

Claim 1

IN A SAUNA INSTALLATION, THE COMBINATION OF AN INSULATED WALLED ROOM, A HEATING UNIT DISPOSED IN SAID ROOM FOR GENERATING AND EMITTING STEAM IN A GENERALLY VERTICALLY UPWARD DIRECTION THEREIN, SUPPORTING MEANS ADAPTED TO SUPPORT THE OCCUPANT WHILE BATHING MOUNTED ON THE INTERIOR WALLS OF SAID WALLED ROOM, AN INSULATING PANEL ON THE CEILING OF SAID WALLED ROOM DIRECTLY ABOVE SAID HEATING UNIT AND SPACED FROM SAID CEILING, AND MEANS EXTERIOR TO THE WALLED ROOM AND CONNECTED WITH SAID HEATING UNIT FOR CONTROLLING THE HEAT ENERGY PRODUCED BY SAID HEATING UNIT; SAID HEATING UNIT INCLUDING A SUBSTANTIALLY VERTICAL CYLINDRICAL HOUSING HAVING A PLURALITY OF ELECTRICAL HEATING ELEMENTS AT VERTICALLY SPACED POSITIONS THEREIN AND OPERATIVELY ELECTRICALLY CONNECTED WITH SAID CONTROL MEANS EXTERIORLY OF SAID ROOM; PERFORATE SUPPORT MEANS IN SAID HOUSING BELOW SAID HEATING ELEMENTS; A COLUMN OF HARD ROUNDED ROCKS SUPPORTED BY SAID SUPPORT MEANS AND HAVING AT EACH OF ITS OPPOSITE ENDS A LAYER OF ROCKS OF APPROXIMATELY TWO (2") INCHES IN VERTICAL THICKNESS OR HEIGHT, SAID ROCKS OF SAID LAYERS RANGING IN SIZE FROM ONE INCH TO ONE AND ONE-HALF (1 1/2") INCHES IN DIAMETER; SAID COLUMN HAVING BETWEEN SAID UPPER AND LOWER END LAYERS OF ROCKS A BODY OF LARGER ROUNDED HARD ROCKS OF DIAMETRIC DIMENSIONS RANGING BETWEEN ONE AND ONE-QUARTER (1 1/4") INCHES AND TWO AND ONE-HALF (2 1/2") INCHES IN DIAMETER, SAID BODY OF LARGER ROCKS FILLING THE SPACE BETWEEN THE LOWER BODY OF SMALLER ROCKS AND THE UPPER BODY OF SMALLER ROCKS; SAID PLURALITY OF VERTICALLY SPACED ELECTRICAL HEATING ELEMENTS BEING DISPOSED IN SAID HOUSING BETWEEN SAID UPPER AND LOWER LAYERS OF ROCKS, SAID LARGER ROCKS IN SAID COLUMN BEING DISPOSED BETWEEN AND ABOVE EACH OF SAID HEATING ELEMENTS; SAID COLUMN OF ROCKS EXTENDING FROM SAID PERFORATE SUPPORT MEANS TO THE UPPER END OF SAID HOUSING; THE UPPER END OF SAID HOUSING BEING OPEN; AND APERTURE MEANS IN THE WALL OF SAID HOUSING BELOW SAID SUPPORT MEANS PROVIDING FOR AIR INLET INTO SAID HOUSING BELOW SAID COLUMN OF ROCKS WHEREBY THE AIR IS CIRCULATED INWARDLY THROUGH SAID APERTURES AND UPWARDLY THROUGH SAID COLUMN OF ROCKS AND OUT THE OPEN END OF SAID CYLINDRICAL HOUSING TO HEAT SAID ROOM, SAID ROCKS BEING ALSO HEATED BY SAID HEATING ELEMENTS.