MULTI-USE COOKERS UTILIZING WARM AIR HEATING FOR USE AS A HIGH PRODUCTIVITY DEEP FRYER, A LARGE CAPACITY SAUTE PAN, A RICE AND PASTA COOKER AND AN INDIRECT HEATING COOKER; RESERVE OIL CARTS WITH PUMPS AND FILTERS; COOKING TABLES COMPRISING A HEATING ELEMENT AND WORK SURFACE; AIR FILTERING AND PURIFYING UNITS ALL OF THE AFOREMENTIONED EQUIPMENT FOR COMMERCIAL USES SUCH AS IN RESTAURANTS AND BY CATERERS