Furnace Flue Pipe Installation

6 7 and 8 inch diameter flue pipes must be at least 24 gauge in thickness.

Furnace flue pipe installation. Flue pipe joints should overlap 30 mm 1 1 4 in each joint in the assembly must be fastened with at least three screws. Flue pipe is too small for the amount of combustion gases generated by the furnace. A flue pipe is a metal pipe that either stands alone as a chimney pipe leading from a furnace or runs inside a masonry chimney. Run vertical pipe up through the ceiling and roof.

Galvanized flue pipes must not be used because the coatings vaporize at high temperatures and release dangerous gases. Pull away insulation or install an insulation shield to keep the area clear around the pipe. Pitch the flue pipe up toward the chimney. You would core a hole 1 4 to 1 2 inch bigger than the outer diameter of the pipe.

Without it smoke and other toxic materials will build up inside the house. The most common variables for which the flue must be sized are btu capacity of the furnace the horizontal and vertical length of the flue and the number of elbows and type of vent connector the part of the flue that connects the furnace to the main flue pipe. Installing a flue pipe is the most important part of the installation of your new furnace. The size would depend on your furnace s flue pipe connection.

These toxins can have a deadly effect. This allows the hot combustion gases to to move into the chimney easier. Cut a framing hole at least 10 inches in diameter with a jigsaw tool. Use black painted flue pipes.