ELECTRONIC CONTROL DEVICES FOR AIR TREATMENT DEVICES AND INSTALLATIONS; MEASURING DEVICES FOR MEASURING CONCENTRATIONS OF GERMS OR POLLUTANTS IN THE AIR
Electrical and Scientific ApparatusAIR TREATMENT DEVICES AND INSTALLATIONS, IN PARTICULAR AIR CONDITIONING UNITS, VENTILATORS FOR TRANSPORTING AIR, EXHAUST AIR PURIFICATION UNITS, AIR GERMICIDAL DEVICES AND INSTALLATIONS FOR AIR TREATMENT; ACCESSORIES FOR AIR GERMICIDAL DEVICES FOR AIR TREATMENT DEVICES AND INSTALLATIONS, IN PARTICULAR FILTERS FOR FILTERING OUT GERMS IN AIR, UV-RADIATORS FOR DESTROYING GERMS TN AIR, AIR IONIZATION DEVICES FOR DESTROYING GERMS IN AIR
Environmental Control ApparatusREPAIR, MAINTENANCE, AND SERVICING OF EXISTING AIR TREATMENT DEVICES AND INSTALLATIONS; PROVIDING ADDITIONAL AIR TREATMENT DEVICES AND INSTALLATIONS FOR MEETING PREDETERMINED CONCENTRATIONS OF GERMS OR POLLUTANTS
Building Construction and RepairCONDUCTING TECHNICAL PROJECT STUDIES FOR AIR TREATMENT DEVICES AND INSTALLATIONS; CONDUCTING TECHNICAL MEASUREMENTS FOR DETERMINING CONCENTRATIONS OF GERMS OR POLLUTANTS IN THE AIR DURING THE OPERATION OF AIR TREATMENT DEVICES AND INSTALLATIONS
Computer and Scientific