Air filter frames in the nature of frameworks of metal for use in residential, commercial, industrial, and agriculture facilities; Air filter frames in the nature of frameworks of metal for use in air filtering installations

Dust separators; Air pollution control equipment, apparatus, and installations for commercial and industrial use in commercial and industrial installations, namely, dust collectors being parts of dust collecting machines for air cleaning purpose, dust collecting machines that remove particulate matter from air by passing the air through a liquid medium, centrifugal dust separators, centrifugal dust collecting machines, cyclone dust separators, cyclone dust collecting machines; Air filters for motors and engines; Filters for cleaning cooling air, for engines; Air filters for agricultural, commercial, industrial, power generation, and residential facilities and installations, namely, air filters for mechanical purposes; Air filters for residential and commercial uses, namely, air filters for motors and engines

Air quality measurement apparatus, namely, particle counters; Air quality analyzing and monitoring apparatus and instruments, namely, electronic monitors and detectors for monitoring and detecting airborne particulates and for monitoring and measuring air speed, pressure drop, and humidity; Air quality particulate measurement instruments, namely, particle counters

Air filters for residential facilities and installations; Air filtration machines for agricultural, commercial, industrial, power generation, and residential facilities and installations; Air filters for residential and commercial uses, namely, air filters for domestic use and industrial installations; Air filtering installations; Air filters for domestic use; Air filters for industrial and domestic installations

Servicing, namely, maintenance and repair of environmental control systems in the nature of air filtration systems and installations and parts therefor; Servicing, namely, maintenance and repair of environmental control systems in the nature of dust collection and control systems and installations and parts therefor

Custom design and engineering of air filtration systems and installations for agricultural, commercial, industrial, power generation, and residential facilities; Custom design and engineering of dust control systems and installations for agricultural, commercial, industrial, and power generation facilities; Design of environmental control systems, namely, air filtration systems and parts therefor; Testing of environmental control systems, namely air filtration systems and installations and parts therefor; Testing of environmental control systems, namely dust collection and control systems and installations and parts therefor