Metal chimneys; metal chimney flues; metal stovepipes; pipes, clamps, and fittings therefor of metal; metal building products, namely, formed metal conduits, and metal screens both with and without shutters incorporated therein; chimneys for fuel burning appliances, namely, furnaces, fireplaces and stoves made primarily of metal; flexible metal connector pipes; ventilating ducts of metal; metal chimney liners; metal baseplates, couplings, tee sections, covers, rain caps, spacers, collars, stove connectors and adapters; metal chimney caps; metal chimney cowls; metallic venting pipes and tubes of metal for appliances using various fuel sources; ventilating ducts of metal; metal venting parts, namely, metal connector pipes for venting; metal pipes elbows for pipes, tees, and supports; vent adapters; alignment pipes, namely, alignment pipes of metal for venting; tee-caps, namely, metal tee-caps for venting; metal tee-caps for venting having metal latches; metal vents for venting gas appliances; roof hatches, smoke vents, floor doors and sidewalk doors; all-fuel chimney systems; chimney and pipe system installation parts made of metal, namely, flashings, split angle rings, flange adapter kits, supports, and guides; metal chimney system parts, namely, supports and buckets; metal duct connectors; access doors, roof hatches, garage doors, and static heat and smoke vents, all made of metal; ventilation systems comprising metal gas vent pipes and metal chimneys; metal air duct fittings for use with air distribution systems; metal roof accessories for HVAC and plumbing installations, namely, mounting rails and flashing systems comprised of reinforced pipe flashings; metal clamps; metal roof vents for ventilation in residential and commercial buildings; ventilating metal pipes; ventilating metal liners; HVAC ductwork components and accessories made primarily of metal, namely, flanges, connectors, couplings, access doors, and hangers

Heating supplies and equipment, namely, chimney flues and parts therefor; gas heaters and pipes for heating and ventilating equipment and supports and parts therefor; metal gas vent pipes and fittings for use with gas appliances; flues, chimney and vent pipes being part of heating and ventilation installations and structural parts thereof, namely, pressure reducer valves, safety valves, clamps, T-pieces, connectors, reducers, drip caps, steam valves, elbow joints, tee joints, reducing couplings and drip caps, all for the aforesaid pipes and flues and all sold as a unit; furnaces; fireplaces; chimney flues; internal liners for metal chimneys, all the aforesaid goods made wholly or principally of metal; stovepipe kits comprising pipe sections, connectors and trim collars; metal gas vents; chimneys for solid fuel stoves; venting conduits for direct vent stoves and fireplaces; direct vents for gas, oil and solid fuel appliances; ventilating exhaust pipes and tubes for heating appliances using various fuel sources; ventilation apparatus, namely, pipes and pipe fittings for venting; apparatuses for filtering air, namely, air filtering apparatuses and machines for filtering air for commercial and domestic use; air filtration installations; air filtration units; air purifying apparatuses and machines; air filters for air filtration units in industrial installations; filters for air purifiers; diffusers; registers; grilles; louver valves; return faces; heat and smoke ventilators; chimney sections, pipes, expansion joints, slip joints, joints, drain plugs, elbows, tees, increasers, penetration assemblies, closure rings, storm collars, caps, stack termination caps, and cones; baseboard and floor registers; side wall registers; ventilating registers; dampers; damper kits comprising damper bearings, counterweights, chain, chain coupling and chain lock; grille frames, air volume controllers; manual air volume dampers; control grids and baffles for use with registers, grilles and diffusers for air distribution systems; damper regulators and regulator sets comprising chain, pulleys, hooks and screws packaged together; gas vent pipes and chimneys; flexible duct primarily of nonmetal for use with air distribution systems; metal air duct fittings for use with air distributions systems; registers, diffusers, and grilles used in heating, ventilation, and air conditioning systems; non-metal chimney liners; non-metal gas vents for condensing heating appliances comprising polypropylene pipes, fittings, clamps and liners; HVAC ductwork components and accessories made primarily of metal, namely, diffusers, air turning vanes and rails, and dampers, namely, control devices used in air ducts to regulate the flow of air

Non-metal rigid pipes and fittings therefor, for gas, oil, and solid fuel appliances; pipe flashing units made of plastic and rubber for mechanically sealing pipes going through openings in roofs; flexible duct primarily of nonmetal for use with air distribution systems; non-metal roof accessories for HVAC and plumbing installations, namely, mounting rails, pipe flashing adaptors, and flashing systems comprised of reinforced pipe flashings