Air filters for industrial use; Filters for air purifiers; Air filters for household use; Dehumidifiers; Air dehumidifiers; Air washers; Electric heaters for commercial use; Gas scrubbers; Air filtering installations; Ventilating fans for commercial and industrial use; Ventilating exhaust fans

Apparatus for humidifying ventilating air; humidifiers; Air cleaners and purifiers for residential and commercial use, incorporating an air filter and accompanying housing; Fresh air exchangers for use in residential and commercial forced air heating and air conditioning systems; Heat recovery ventilators for heating and cooling applications; electrically powered heat exchangers, other than parts of machines, for residential use; Porous pad evaporators used in humidifiers; Evaporative coolers...

Apparatus for humidifying ventilating air; humidifiers; Air cleaners and purifiers for residential and commercial use, incorporating an air filter and accompanying housing; Fresh air exchangers for use in residential and commercial forced air heating and air conditioning systems; Heat recovery ventilators for heating and cooling applications; electrically powered heat exchangers, other than parts of machine, for residential use; Porous pad evaporators used in humidifiers; Evaporative coolers ...