11
Exhaust air purification installations for organic pollutants and odiferous substances, and parts for the aforesaid installations; ventilation systems and parts therefor; measuring, control, regulating and/or monitoring apparatus and devices for the aforesaid installations; air treatment apparatus, air entrainment devices (included in class 11), in particular ventilators, blowers, air coolers, air filters, jet chambers for the humidifying and elutriation of air, vaporiser nozzles, air volume control valves, air conduits, air outlets, nozzles; filters for process air technology, for filtering dust, fibres, chips, granules and paper; heat exchangers and parts therefor, for exhaust air purification installations
42
Analysis, planning, development, presentation and conducting of technical concepts; technical consultancy; conducting surveys, statistics and prognoses for technical and/or scientific purposes; engineering, architecture and physics; energy technology, electrotechnical and air technology consultancy and support; computer programming and maintenance of computer programs; telemonitoring of technical, building technology and domestic technology projects (included in class 42)