Wet cleaning apparatus for air and/or other gaseous media;
apparatus and plants for ventilating, heating, cooling, drying, humidifying, de-humudifying, hardening, cooking, lighting, and for the treatment of air by heating, cooling, humidifying, de-humidifying, or cleaning, including electrical cleaning apparatus included in this class;
heat exchangers for air and/or other gaseous media;
ventilators blowers and fans, centrifugal separators and;
supply and discharge valves for exhausted air from same;
dampers for ventilating plants;
ducts and channels for ventilating plants;
dryers and conditioning plants for drying, moistening, de-moistening, and hardening for treating cellulose and other fibrous material, paper, cardboard, carton, disintegrated cellulose, grain, timber, veneer and board
Weir doors for swimming pool, spa, and hot tub skimmers;
Vacuum control plates for skimmers in swimming pools, spas, and hot tubs;
Socks or nets as part of the skimmer baskets of swimming pools, spas, and hot tubs;
Baskets, not of metal, as part of swimming pool, spa, and hot tub skimmers and filters;
Spas in the nature of heated pools