air conditioners; air driers; air reheaters; cooling evaporators; cooling installations and machines; evaporators; filters; HVAC units; HVAC/R units; drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; refrigerating appliances and installations; apparatus for the exchange of substances and heat for use in refrigeration; refrigerator condensers; dryers for the removal of water vapor from compressed air and gases; cooling units for industrial purposes; evaporative air cooling units; air cooling apparatus; components for air conditioning and cooling systems, namely, evaporative air coolers; cooling evaporators; air-conditioning, air cooling and ventilation apparatus and instruments; desiccant systems comprised primarily of liquid desiccants for cooling, humidification, dehumidification, and heating, as components of HVAC units; desiccant systems, namely, combinations of liquid desiccants and membranes in a housing, for cooling, humidification, dehumidification, and heating; valves for fluid control; desiccant dehydrators; heat pumps; pressure regulators for gas, water and sanitary installations; thermostats; air movers; fans; refrigerant and evaporative condensers for air conditioning, heat pumps, and commercial and industrial refrigeration systems; humidifiers; dehumidifiers