In today's chimney industry, we have top-locking chimney dampers that are easy to install, rust proof, and completely seal the flue when not in use.

It is possible to replace a chimney throat damper, but installing a flue-top damper makes more sense and is a relatively easy do-it-yourself project. A good quality flue-top damper costs between ...

The smoke chamber — the area between the damper and the first flue liner — needs to be a minimum of 27 inches high. Speaking of flue liners, fireplace masons often install ones that are too large.

The safety clip is a simple device that attaches to the damper and will not allow the damper to close all the way. If not, call a fireplace specialist to inspect and install a safety clip.

Also if the fireplace will be placed in a room, like a freestanding wood stove, figure out how you're going to re-arrange the existing elements ahead of installation.