11
HVAC systems (heating, ventilation and air conditioning); Apparatus and installations for ventilating; Apparatus for ventilating; Fans [air-conditioning]; Air-conditioning installations; Air purifying apparatus; Filters for air conditioning; Filters for cleaning air; Cooling installations; Heating installations; Coils [parts of distilling, heating or cooling installations]; Dampers [heating]; Installations for central heating; Humidifiers for central heating radiators; Thermostatic valves; Air-conditioning apparatus; Humidification apparatus for use with air conditioning apparatus
17
Acoustic baffles for soundproofing purposes; Soundproofing materials; Acoustical insulation barrier panels; Acoustic screens for insulation; Sound-absorbing wall coverings; Sound-adsorbing ceiling coverings; Sound control flooring underlayment; Structures (non-metallic -) for noise abatement [insulation]; Acoustic insulating materials; Insulation and barrier articles and materials; Insulating materials
42
Technical design; Technical design and planning of heating installations; Technical design services relating to cooling appliances and installations; Design services; Engineering services relating to energy supply systems; Research and development services