Jeff's experience designing content solutions led him to be one of our first contributors. He helped draft Makey's blueprint and is one of the best explainers of technical details we know.
On the outside, chimneys are often admired for being well-designed, formidable structures. But don’t let their appearance fool you because, as the old saying goes, “it’s what’s on the inside that counts.” And, the inside of a chimney is called the flue.
If the chimney is the visible masonry structure rising out of the firebox through the roof to the exterior of the home, the flue is the open-air space inside the chimney that vents hot air, smoke, and gases from the fire to the outside. As the hot air rises through the flue to the exterior of the home, it draws cooler air from the interior of the building through the firebox back into the flue. Airflow plays an important role in controlling the temperature of the fire and overall heat retention, and is typically regulated by dampers, which open and close to allow more or less air to move through the flue.
Despite being strong masonry structures, chimneys are not damage proof. That’s why, to help protect your chimney, it’s highly recommended (and mandated in some areas) that you install a chimney flue liner: