Boilers (other than parts of machines); Boilers being parts of central heating installations; Boilers for central heating installations; Boilers for hot water supply installations; Boilers for use in heating systems; Central heating boilers; Heating boilers; Hot water boilers; Water boilers; Water heating apparatus (other than parts of machines); Heating apparatus; Heated towel rails; Electrically heated towel rails; Boiler pipes (tubes) for heating installations; Heat regulators (valves) being parts of heating installations; Temperature control apparatus (valves) for central heating radiators; Thermostatic control valves for central heating radiators; Thermostatic valves (parts of heating installations); Control devices (thermostatic valves) for heating installations; Control units (thermostatic valves) for heating installations; Instruments for temperature control in central heating installations (thermostatic valves); Igniting apparatus; Heat pumps; Fans for ventilating; Electrically powered blowers for ventilation