air conditioners; air conditioning devices; room air conditioners; evaporators for air conditioners; evaporators for air conditioning systems; air-conditioning devices; evaporators for air-conditioning systems; ventilation [air-conditioning] installations for buildings; cooling installations for gas; air conditioning apparatus for residences; air conditioning apparatus for residential use; air vents [ventilation systems]; air heating apparatus for residential use; heating installations [water]; air doors [air conditioners]; heating units; aerators [ventilation systems]; air doors being air conditioners; air-conditioning apparatus for residential use; axial-flow fans for air-conditioning; evaporators for air conditioning apparatus; hot air doors being air conditioners; evaporative air coolers; residential air-conditioning units; air-conditioning apparatus for residences; axial-flow fans for air conditioning; hot air doors [air conditioners]; electric fans for air-conditioning; evaporators for air-conditioning apparatus; air conditioners for industrial purposes; residential air conditioning units; air conditioners for vehicles; air conditioning apparatus for commercial buildings; cooling installations for water; water conditioning systems; room ventilators [supply dampers]; hot air doors [air-conditioning apparatus]; ventilation dampers; air conditioning apparatus; air conditioning apparatus for office use; fans [air conditioning]; axial fans for air conditioning; air cooling devices; heating installations; room air-conditioning apparatus; floor heating apparatus; room air conditioning apparatus; ventilation [air-conditioning] installations for vehicles; air conditioning installations for residential use; motorized fans for air conditioning; air impellers for ventilation; air-conditioning apparatus for commercial buildings; environmental control installations for cooling purposes; environmental control installations for the purposes of cooling; axial fans for air-conditioning; motorized fans for air-conditioning; air conditioning apparatus for public buildings; air-conditioning apparatus; ventilation [air-conditioning] installations for laboratories; air heating apparatus; hot air doors being air-conditioning apparatus; ventilating fans; ventilation [air-conditioning] installations and apparatus; combustion chambers; air conditioning apparatus for air vehicles; air-conditioning installations for residential use; heating installations for fluids; air doors [air-conditioning apparatus]; thermostatic valves as parts of heating installations; ventilating fans for industrial use; cooling installations; air-conditioning apparatus for office use; fans [air-conditioning]; ventilating fans for use in vehicles; air conditioning apparatus for use in clean rooms; air-conditioning apparatus for public buildings; portable air conditioners; environmental control apparatus and installations for the purposes of cooling; dampers [heating]; thermostatic valves [parts of heating installations]; installations for the cooling of water; evaporators; air cooling apparatus; cooling appliances and installations; installations for cooling water; environmental control apparatus for the purposes of cooling; heating installations for industrial use; air conditioning filters; environmental control apparatus for cooling purposes; fans for air-conditioning installations; room humidifiers [apparatus]; air-conditioning apparatus for use in clean rooms; cooling installations and machines; air-conditioning units; ventilating fans for industrial purposes; fans for air-conditioning apparatus

installation of HVAC systems; installation of heating, ventilation and air-conditioning [HVAC] systems; installation, maintenance and repair of heating, ventilation and air-conditioning [HVAC] systems; installation, maintenance and repair of HVAC [heating, ventilation and air conditioning] systems; installation of heating, ventilation and air-conditioning systems; cleaning of air conditioners; installation and repair of heating, ventilating and air-conditioning systems; retrofitting of heating, ventilating and air-conditioning installations in buildings