Air-conditioning apparatus; Air-conditioning apparatus and installations; Air-conditioning installations; Air-conditioning, air cooling and ventilation apparatus and instruments; Air purifiers; Charcoal grills; Dehumidifiers for household use; Dryers for the removal of water vapor from compressed air and gases; Electric grills; Heating systems composed primarily of tubes, pipes and manifolds through which warm or high temperature water circulates; HVAC units; Plumbing fittings, namely, couple...