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Description: Electronic controls for environmental heating and cooling apparatus; Environmental heating and cooling apparatus in the nature of heating and air conditioning zone dampers, namely, control devices used in air ducts to regulate the flow of air

Description: Climate control systems consisting of digital thermostats, air conditioning, heating, ventilation and drying control devices

Description: Electronic controls for environmental heating and cooling apparatus; Environmental heating and cooling apparatus in the nature of heating and air conditioning zone dampers, namely, control devices used in air ducts to regulate the flow of air