Electrostatic air filters; refrigeration apparatus; fluid, air and water heaters and chillers all for domestic, commercial and industrial use; air delivery and handling apparatus, all for cooling, heating and ventilating domestic, commercial and industrial buildings and for use in industrial processes; air inductor apparatus, filters, humidifiers, ventilators, diffusers, blenders and convectors; terminal air devices; variable air volume apparatus; refrigerant condensers, evaporators; refrigerant compressors and absorbers; condensing units; fan-coil apparatus; fans and blowers; furnaces; air conditioners and heat pumps, heat exchangers for use in heat transfer for industrial and commercial uses; parts and fittings for all the aforesaid goods; all included in Class 11.;