The exhaust gases are vented by way of a small flue pipe that can be directed out a side wall or upwards through the roof.
There is one internal brick chimney at the rear, and a metal flue pipe in the one-story family-room addition.
If you have a fireplace, before you use it, look up the flue pipe and make sure it is clear and open.
Install any flue pipe or tie appliance into chimney.
When taking smoke measurements in the flue pipe, the intake end of the sampling probe is placed at the center line of the flue.
Part of the organic compounds in smoke often condenses in the chimney or flue pipe.
British Dictionary definitions for flue pipe
an organ pipe or tubular instrument of the flute family whose sound is produced by the passage of air across a sharp-edged fissure in the side. This sets in motion a vibrating air column within the pipe or instrument