Water heaters for domestic, commercial and industrial use; heating boiler; heating apparatus; heating installations (water); flues for heating boilers, boiler pipes and tubes for heating installations,;regulating and safety accessories water water apparatus, namely, water filters and puirification unites, and flow control valves; regulating accessories for water and gas apparatus as well as for water and gas pipes, namely, flow restrictors for reverse osmosis water purification units, and flow control valves; solar collectors for heating; solar furnaces; steam accumulators; solar heating panels; pressure water tanks; heat accumulators; heat exchangers; heating installations (water); cooling installations for water, namely, water cooling towers; heating installations, namely, hot water space heating apparatus; air conditioning installations; air conditioning apparatus, namely, air conditioners