Sanitary apparatus and installations; clean chambers [sanitary installations]; air purifying apparatus and machines; air-conditioning apparatus; air-conditioning installations; ventilation apparatus; air filters; air sterilizers; humidifiers; air deodorizing apparatus; air reheaters; air handling installations; electrostatic air filters; industrial air purifiers; air separation apparatus; air purifying apparatus; air filtering installations; air circulation apparatus; household air cleaners; air treatment equipment; air conditioning apparatus for industrial use; air cleaning filters [parts of air cleaning machines or installations]; filters for air conditioning; smoke purifiers; humidifiers; equipment for ventilation; aeration apparatus.

Installation, maintenance and repair of sanitary apparatus and installations; installation, maintenance and repair of air-conditioning apparatus; installation, maintenance and repair of ventilation apparatus; repair or maintenance of air-conditioning apparatus [for industrial purposes]; installation of air conditioning apparatus for use in clean rooms; HVAC (heating, ventilation and air conditioning) installation, maintenance and repair; providing information relating to the repair or maintenance of air conditioning apparatus; retrofitting of heating, ventilating and air conditioning installations in buildings; retrofitting of air conditioning installations in buildings; installation of dust extraction apparatus; installation of apparatus for ventilating; heating equipment installation and repair; installation and repair of air-conditioning apparatus; installation and repair of air-conditioning apparatus; installation, repair and maintenance of air reheaters; routine servicing of dust extraction apparatus; routine servicing of air conditioning apparatus; routine servicing of heating apparatus; routine servicing of ventilating apparatus; maintenance and repair of dust extraction apparatus; advisory services relating to the installation of heating and cooling apparatus; information and consultancy services relating to the installation, maintenance and repair of sanitary apparatus and installations; information and consultancy services relating to the installation, maintenance and repair of air conditioners and ventilation apparatus; information and consultancy services relating to the installation, maintenance and repair of air-purifying apparatus and machines.