11 Heat pumps; heat pumps for energy processing; central heating installations; electric heating installations; control units (thermostatic valves) for heating installations; control devices (thermostatic valves) for heating installations; heating installations; home heating installations; heat exchange installations for use in the recovery of waste heat; non-electric central heating installations; solar heating installations; temperature sensitive controls for automatically operating valves (parts of heating installations); temperature control apparatus (thermostatic valves) for central heating installations; evacuated heat pipe solar collectors (heat exchangers); heaters; self regulating heaters; air-conditioning apparatus; air-conditioning installations; hot water heating installations; apparatus for water heating; water heating installations