Installation of ionization apparatus for the treatment of air, namely, air purifying apparatus for industrial and commercial use, of appliances and machines for air purification, namely, air purification units for industrial and commercial use, of electric air heaters, of devices as apparatus for air cooling, of air sterilizers, of filters for air conditioning (AC), of air conditioning installations, of air filtering installations, and of hot air space heating apparatus; Maintenance and/or repair of ionization apparatus for the treatment of air, namely, air purifying apparatus for industrial and commercial use, of appliances and machines for air purification, namely, air purification units for industrial and commercial use, of electric air heaters, of devices as apparatus for air cooling, of air sterilizers, of filters for air conditioning (AC), of air conditioning installations, of air filtering installations, and of hot air space heating apparatus
Building Construction and Repair