Building technology/ building services (building automation)CleaningGas installationHeatingPlant engineeringRefrigerationRenewable energiesSanitarySolar panelsVentilation
Cable layingCleaningCommunication technologyData network worksElectrical installationIndustrial construction and hall buildingLighting systemsPhotovoltaicsRenewable energiesSolar panels
Air conditioningCanal constructionCleaningElectrical installationHeatingPipeline constructionRemediation worksRenewable energiesSanitarySolar panelsTiles and panels