Furnace Flue Pipe Installation

Flue pipe is too small for the amount of combustion gases generated by the furnace.

Furnace flue pipe installation.

These toxins can have a deadly effect. 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. Cut a framing hole at least 10 inches in diameter with a jigsaw tool. Installing a flue pipe is the most important part of the installation of your new furnace.

Pull away insulation or install an insulation shield to keep the area clear around the pipe. 6 7 and 8 inch diameter flue pipes must be at least 24 gauge in thickness. You would core a hole 1 4 to 1 2 inch bigger than the outer diameter of the pipe. In the old masonry chimneys the tile flues can crack or break over time due to the effects of repeated heating and cooling of the air inside the chimney.

Use black painted flue pipes. The size would depend on your furnace s flue pipe connection. The pipe then slips into the hole and is sealed with a high temperature silicone caulk. Pitch the flue pipe up toward the chimney.

Without it smoke and other toxic materials will build up inside the house. Flue pipe joints should overlap 30 mm 1 1 4 in each joint in the assembly must be fastened with at least three screws. Galvanized flue pipes must not be used because the coatings vaporize at high temperatures and release dangerous gases. 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.