11 safety equipment for gas devices, gas mains, water devices or water mains, namely, plumbing valves, steam valves, regulating accessories for water supply, namely, metered valves; electric heating fans; power plants; hot water heating systems comprising burner and oil or gas fretted burning plant; central heating elements, namely, thermostatic valves, heat sinks, electric heating fans, heat accumulators, heat exchangers, heat pipes to cool heat producing components, heat pumps, heat registers, quenching apparatus for heat treatment; thermostatic valves, namely, parts of heating installations; electrical and spark igniters for gas appliances and heating plants; electrical furnace boilers; hot water heaters for domestic, commercial or industrial use; sewage treatment plants; heat pipes to cool heat producing components; control equipment for gas devices, namely, valves for the relief of temperature, pressure and gas concentration, namely, thermostatic valves and steam valves; boilers for oil and gas fuel led burning plants, furnaces; mains and pipes being parts of sanitary facilities; air conditioning systems comprising oil and gas fuel led burning plants; furnace boilers, namely, furnace boilers for solid, liquid, or gaseous fuels; burner technology for heating plants, namely, burner igniters for gas furnaces, thermostatic valves, heat sinks, electric heating fans, heat accumulators, heat exchangers, heat pipes to cool heat producing components, heat pumps, heat registers, quenching apparatus for heat treatment; fuel engineering and heating technology for heating plants, namely, solid, liquid, or gaseous fuel burning stoves, burner igniters for gas furnaces, thermostatic valves, heat sinks, electric heating fans, heat accumulators, heat exchangers, heat pipes to cool heat producing components, heat pumps, heat registers, quenching apparatus for heat treatment; control and feedback control for heating technology, namely, valves for the relief of temperature, pressure and gas concentration, gas regulators, regulators for heaters, heating systems, electrical furnace boilers, furnace automates, electric heating fans, power plants, furnace boilers, namely, furnace boilers for solid, liquid, or gaseous fuels