Air conditioning apparatus; heat accumulators; steam accumulators; electric air deodorizing apparatus; air cooling apparatus; air driers, namely, dehumidifiers; air conditioning installations; air filtering installations; ionization apparatus for the treatment of air or water; air valves for steam heating installations; air purifying apparatus and machines; air sterilizers; boiler pipes for heating installations; boilers, other than parts of machines, namely, electrical boilers, furnace boile...