e²

Electric equipment and instruments (included in this class), namely switches, time delays, interval and inverse circuits for heating, ventilating and air conditioning apparatus and installations, and systems constructed therefrom for filter monitoring or central control; manually operated or reference variable-dependent circuits, in particular for the reference variables humidity, light, movement, temperature, gas and other variables affecting air quality, and other reference variables in the field of building technology, for the control of heating, ventilating and air conditioning systems; fire protection barriers, fire sensors and data processing equipment therefor, data transmission apparatus, cables and cable networks, and automatic barrier devices to prevent the spread of fire in ventilation ducts; electric drive elements for opening windows and all parts therefor and control devices therefor.Heating, ventilating and air conditioning apparatus and installations, in particular radial fans, outer wall air vents, overflow channels and components therefor (included in this class), and room ventilation systems consisting of the aforesaid apparatus.Installation, maintenance and repair of heating, ventilating and air conditioning apparatus and installations, fire protection devices and drive elements for opening windows, and data processing equipment therefor, data transmission apparatus, cables and cable networks, and automatic barrier devices to prevent the spread of fire in ventilation ducts, drive elements for opening windows and all parts therefor and control devices therefor.Design and technical consultancy with regard to the planning of fire protection devices and data processing equipment therefor, data transmission apparatus, cables and cable networks, and automatic barrier devices to prevent the spread of fire in ventilation ducts, drive elements for opening windows and all parts therefor and control devices therefor, being engineering services.