LED lighting control apparatus;lighting control apparatus; ballasts for lighting installations

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