What are Andirons and How Do Firedogs Protect My Fireplace?

If you’ve ever seen decorative metal supports inside a traditional fireplace, you’ve likely been looking at andirons, also known as fire dogs. These classic components have been used for centuries to hold firewood in place, improve how a fire burns, and add visual character to a masonry fireplace.

How do Andirons Work?

Andirons sit in front of the glass or opening of your hearth appliance. Everything from wood stoves to masonry fireplaces make use of andirons.

An andiron is one of a matched pair of metal supports that sit on the fireplace floor. Each piece has a horizontal back bar, called a shank, which holds the wood, and a front upright post that keeps logs from rolling forward. By raising the firewood several inches above the masonry hearth, andirons allow oxygen to flow freely underneath the fuel. This airflow is essential for reliable ignition and clean, efficient burning.

When firewood rests directly on the hearth, it smothers the fire and produces smoke. Elevating the logs creates a natural draft beneath them, giving the fire the oxygen it needs to burn hotter and more consistently. Andirons also act as a safeguard by preventing shifting logs from rolling toward the room and reducing prolonged contact between burning wood and the hearth floor. NFPA 211 classifies andirons as masonry fireplace accessories, meaning they are optional tools intended exclusively for open-burning masonry fireplaces.

Why Are Andirons Called Firedogs?

The term “firedog” comes from the shape of traditional andirons. Early designs often featured upright front posts crafted to resemble small dogs! (Complete with heads, legs, or curved “paws.”) These decorative front supports looked like loyal animals standing guard at the mouth of the fire. Over time, the nickname stuck, and “firedog” became a common English term for andirons, even when the design became simpler and more utilitarian. In essence, they were seen as sturdy companions that “guarded” the fire and prevented logs from escaping.

Where Can You Buy Andirons?

Andiron Safety and Sizing Considerations

Andirons must fit fully inside the firebox. No part should extend beyond the fireplace opening, as exposed metal becomes dangerously hot. They should also sit far enough back to avoid interfering with the damper. Measuring the depth and width of the firebox before selecting a set ensures proper fit and safe operation.

An andiron is a metal stand that holds firewood up inside a brick fireplace. It helps air flow under the logs so the fire burns better and keeps logs from rolling out.

Andirons are an important part of your fireplace and one of many fireplace terms that we use at The Stove Shop. There is an entire industry filled with terminology most folks never use. (Words like fireplace insert, pre-fab, level 2 and pyrolysis.) Our goal is to help you better understand these terms and provide information so you can make the best decision possible for your home.

We believe homeowners are smart, capable people that can make their own decisions as long as quality education is available. If we can be of use, please contact us at The Stove Shop.