11 Heat pumps; heat exchangers, other than parts of machines; heat accumulators; heat generating apparatus; heat regenerators; heat accumulators; heat pumps for energy processing; shell heat exchangers; HVAC systems (heating, ventilation and air conditioning); cold air blowing apparatus; heat sinks for use in heating apparatus; heat sinks for use in cooling apparatus; heat sinks for use in ventilating apparatus; combined heating and air conditioning apparatus; air heating installations; air cooling apparatus; boiler pipes for heating installations; motorised fans for ventilation; linear air diffusers; valves as parts of radiators; ventilating fans; ventilators for heat exchangers; hot water apparatus; storage water heaters; air-source heat pump water heaters; electrically heated hot water tanks; supply air diffusers; copings of metal as adapted parts or accessories of heat exchangers, heat accumulators or ventilating apparatus