11
Heat pumps; Air-source heat pump water heaters; Heat pumps for energy processing; Domestic air conditioning installations; Air filters; Ventilation [air-conditioning] installations and apparatus; Air-conditioning installations; Heating installations; Ventilating installations; Hot water apparatus; Heat regenerators; Burners, boilers and heaters; Heating, ventilating, and air conditioning and purification equipment (ambient); Sanitary installations, water supply and sanitation equipment; Refrigerating and freezing equipment
37
Installation, maintenance and repair of air-conditioning apparatus; Retrofitting of air conditioning installations in buildings; Retrofitting of heating, ventilating and air conditioning installations in buildings; HVAC (Heating, ventilation and air conditioning) installation, maintenance and repair; Construction of geothermal community heating installations