37 Repair, servicing and installation of ventilating, and air conditioning and purification equipment; repair, servicing and installation of sterilisation, disinfection and decontamination equipment apparatus, machines, units and installations; repair, servicing and installation of air purification apparatus, machines, units and installations; repair, servicing and installation of air purification units, apparatus, machines and installations; repair, servicing and installation of air sterilisation apparatus, machines, units and installations; repair, servicing and installation of air decontamination apparatus, machines, units and installations; repair, servicing and installation of sterilisation, disinfection and decontamination apparatus, machines, units and installations; rental of sterilisation, disinfection and decontamination equipment; rental of ventilating, air conditioning and air purification equipment apparatus, machines, units and installations; rental of sterilisation, disinfection and decontamination equipment apparatus, machines, units and installations; rental of air sterilisation apparatus, machines, units and installations; rental of air decontamination apparatus, machines, units and installations; rental of sterilisation, disinfection and decontamination apparatus, machines, units and installations