Air-conditioning, air cooling and ventilation apparatus and instruments; Air filtering installations; Air impellers for ventilation; Air purifying apparatus and machines; Chimney blowers; Decorative grills made of non-metal non-combustible materials for use in decorating evacuation ducts, air inlets, and hot air outlets of fireplaces; Electric fans; Electric fans for personal use; External filtering device for use in a local containment area for removing oil and other contaminants from storm drain effluent as it exits storm water systems; Flexible pipes being parts of bath plumbing installations; Heating systems for residential and commercial buildings comprised of boilers, valves, pipes, manifolds, control panel switches, and electrical wire, all sold as a unit; Hot air blowers; Plumbing fittings, namely, baffles; Plumbing fittings, namely, valves; Portable electric warm air dryer; Roof fans; Strainers for plumbing drains; Taps for pipes and pipelines being parts of sanitary installations; Turbine ventilators; Ventilating exhaust fans; Ventilating fans for commercial and industrial use; Ventilating fans for industrial purposes; Ventilating, high-velocity portable exhaust fans for commercial and agricultural use; Ventilation fan accessories, namely, grilles; Ventilation hoods