Category Liners & draft

Smoke rolling into the room is not always a blocked flue. In a tightly sealed house the fire simply cannot get enough replacement air.

High-efficiency furnaces produce cooler, wetter exhaust. In an unchanged flue that condenses into acid and eats the chimney from the inside for years.

Plenty of older Elgin chimneys were built with no liner at all. Here is what the liner does, why its absence matters, and what the realistic fix is.

An insert vented into a large open masonry flue is a common installation error that causes poor draft, heavy creosote and hard-to-diagnose smoke problems.