The chimney and flue are two different components that require regular cleaning and maintenance. That said, make sure you don’t use the terms flue cleaning and chimney sweeping interchangeably.

A reputable chimney sweep discusses their difference in this post.
Differentiating the Flue and Chimney
Smoke and gas have to travel away from your fireplace or furnace. The combustion source relieves the pressure using a vertical or fan-supported horizontal pipe. This part is called the flue. It requires annual cleaning due to the smoke and gas it removes when its combustion source operates.
On the other hand, a chimney is a masonry or stone housing protecting the flue. The brick, stone or masonry can protect the flue against the elements and extend beyond the chimney line. Some chimneys have no flue and operate traditionally or have a special lining protecting them against the smoke and gas rising out of them.
Flue Cleaning vs. Chimney Sweeping
Professional flue and chimney cleaning services involve the removal of blockages and buildup impeding their functions, and this is all they have in common.
Flue cleaning is typically much easier and faster than chimney cleaning because it usually connects to pneumatic air pressure combustion sources, such as boilers, furnaces and water heaters. A tentacle whip can remove the accumulated residue or sediment along the flue’s lines.
Chimney cleaning, on the other hand, requires special equipment and cleaning methods to remove caustic buildup along the masonry or lining walls. Soot and creosote require extra effort and aggressive cleaners to be removed effectively.
You can always count on Batts’ Chimney Services for top-notch flue and chimney repair and cleaning services. We are a family-owned company that has served the community since 1978. Call us at (256) 660-1338 (Northern Alabama) or (205) 956-8207 (Greater Birmingham Area). You can also fill out this contact form to schedule a consultation.