Installations and apparatus, all for heating, humidifying, cooling and drying; fans; all included in Class 11; installations and apparatus, all for refrigerating and ventilating; boilers (not for machines), and heating units for use therewith; furnaces (not for experimental purposes); heat pumps; burners (other than perfume burners); incinerators; heat exchangers (not being parts of machines); air filters (not being parts of engines, motors or machines or for scientific purposes); and parts and fittings included in Class 11 for all the aforesaid goods; all relating to buildings in industrial or commercial processes on land, in road vehicles, in aircraft or in ships.;