There’s nothing like sitting next to a cozy fire on a cold winter day. Fireplaces are often a coveted feature, providing a home with ambiance and warming your house. In this guide, we’ll tell you all about fireplaces, covering everything from anatomy and safety precautions to decor ideas and upgrades.
Key Elements of a Fireplace
To help you understand a fireplace’s anatomy so you can use it safely and effectively, we’ve listed the different parts of a fireplace below:
- Ash pit: Cellar under the fireplace grate that collects ashes
- Chimney: Structure that channels smoke and gases out of your home
- Chimney cap: An elevated cover that prevents moisture from snow or rain and animals like birds from entering the flue
- Crown: This tops the chimney
- Damper: A covering that you can move—it separates the firebox from the flue
- Firebox: The fire burns in this cavity
- Flue: Duct or liner that is inside the chimney and moves the smoke up
- Hearth: The fireplace’s floor, which extends into the room
- Mantel: A decorative shelf above the fireplace
- Spark arrester: A metal screen that covers the top of the flue to prevent burning ash from escaping
Anatomy of a Chimney: Beyond the basic parts listed above, a properly functioning fireplace also includes a smoke chamber — the space between the damper and the flue liner that funnels smoke upward. If any of these components aren’t working correctly, you’ll know it: A chimney that smokes constantly may have nests or animals plugging the flue, creosote buildup choking airflow, or a damper set too low (less than 12 inches from the top of the firebox). The fix may be as simple as installing a chimney cap or hiring a chimney sweep certified by the Chimney Safety Institute of America.
How a Fireplace Works
As heat rises, it creates a column of heated gas in the chimney’s smoke chamber. This process is called the “draw,” and it pulls more heat from the fire below, sending it up the flue. The draw helps smoke and gases to flow out of your home, creating a safe and comfortable environment.
Types of Fireplaces
There are three common fireplace types—traditional wood-burning, electric, and gas. Learn more about each in the following sections.
Wood-Burning Fireplaces
Traditional wood-burning fireplaces heat a home and create a cozy atmosphere. They require some regular maintenance, such as chimney sweeps and ash removal. You’ll need a supply of firewood, and you have to make sure the area is properly ventilated for your safety.
Keep in mind that a traditional wood-burning fireplace is only about 15 percent efficient — far less than a modern furnace or boiler. That means most of the heat goes up the chimney rather than into your living space. Still, real estate consultants have told TOH project teams that wood-burning fireplaces add meaningful value to a home, so it’s worth installing them wherever you can.
Gas Fireplaces
Gas fireplaces are popular because they’re convenient and clean. All you have to do is flip a switch to turn them on, and they don’t need wood or ash removal. Gas fireplaces come in vented and ventless options, with the former requiring a chimney or flue and the latter using indoor air for combustion. They may not offer the same traditional ambiance as wood-burning fireplaces, but they’re generally easier to maintain.
Within gas fireplaces, there are important distinctions. A sealed combustion gas insert requires an electrical connection and a gas line in the firebox, along with dedicated ducting for fresh-air intake and exhaust—drawing combustion air from outside rather than from your heated rooms. A gas log set, on the other hand, features a burner with ceramic logs and an open flame, giving you the look and feel of a traditional wood fire. As TOH has reported, traditional wood-burning fireplaces are only about 15 percent efficient, while direct-vent gas units can reach 70 to 82 percent efficiency.
Pro Tip: Richard Trethewey, TOH plumbing and heating expert, explains the appeal of gas fireplaces: “These units are highly efficient because they don’t allow any conditioned air to leave the building, and people love them because they go off and on with the push of a button.”
Electric Fireplaces
Electric fireplaces are versatile and don’t need venting or a fuel source other than electricity. They don’t require a chimney and can feature realistic flame effects. You can also use them with or without heat. While they may not provide as much warmth as wood or gas options, they’re easy to install and are cost-effective.
Safety Considerations for Fireplace Use
You can protect your home and family by practicing fireplace safety precautions. Your fireplace requires regular inspections and proper maintenance. A professional can inspect your fireplace before you use it, especially if you just purchased a new home. Ask your chimney inspector to perform a check annually to identify potential issues before they become safety hazards. The inspection will cover:
- Chimney height and liner condition
- Compliance with current building codes
- Creosote buildup
- Damper functionality
- Mortar and brick integrity
Maintenance Tips for Safe Operation
An inspection is one part of regular fireplace maintenance. You can also keep your fireplace operating safely by taking the following steps:
- Clean the chimney at least once per year, but consider cleaning it more often if used frequently
- Keep the area around the fireplace clear of flammable materials
- Never leave a fire unattended
- Remove ashes regularly
- Use a fireplace screen to contain sparks
You must properly ventilate a gas fireplace, so ask an inspector to check the lines for leaks. Electric fireplaces require less maintenance, but you still have to inspect them for frayed cords or other electrical issues.
Pro Tip: Mark Schaub, chimney expert at Chimney Savers in Hillsborough, New Jersey, who has consulted on many This Old House television projects, compares fireplace safety to parenting: “Fireplaces are like children. They need to be watched. Be prepared to stay with the fire until the end.” Let the fire burn out naturally—tossing water onto it can damage the firebox—then dispose of ashes safely in a metal bin left outdoors. “You’d be amazed at how long embers can stay hot in a bed of ash,” Schaub says. “It could be a couple of days before they cool.”
Why It Matters: Cleaning chimney flues isn’t just about keeping things tidy—it prevents the buildup of creosote, an oily, flammable by-product of wood fires. “This is especially important in homes with older masonry chimneys,” says Charlie Halbert, a veteran home inspector based in Connecticut. Mortar between the bricks deteriorates over time, resulting in gaps; if creosote residue in the chimney catches fire, the flames can spread through those openings. The National Fire Protection Association recommends that chimneys be swept at least once a year at the beginning of winter. Find a certified sweep through the Chimney Safety Institute of America at csia.org.
Give Your Fireplace a Fresh Look
Painting or staining your fireplace brick is a simple do-it-yourself (DIY) project that can dramatically change the feel of a room. Remember to use protective gear and ventilate the space as you paint or stain your fireplace, and if you live in a home with lead paint, consider hiring a professional to handle any paint removal.
Paint your fireplace by taking the following steps:
- Clean the surface thoroughly with soap and water.
- Apply a latex primer designed for masonry.
- Use elastodynamic paint or acrylic latex exterior paint for best results.
- Apply thin coats with a roller or brush, allowing each coat to dry completely.
You can stain the brick if you want a more natural look. To stain your fireplace, you can:
- Clean and dry the brick surface.
- Test the stain in an inconspicuous area to make sure it’s the right color for the room.
- Apply a thin coat of stain with a brush or clean rag.
- Wait 24 hours between applying another coat.
Refinishing your mantel can give the entire room a fresh look. You can refinish a wooden mantel by following the steps outlined below:
- Remove old paint or varnish with a chemical stripper.
- Clean the surface and allow it to dry completely.
- Sand lightly if you think it’s necessary, but be careful not to damage any intricate details.
- Apply new paint or stain as desired.
Real-World Refresh: When Kevin and Layla Palmer tackled the dreary gray fireplace in their 1950s Prattville, Alabama, home, they painted the firebox and surrounding brick with black heat-resistant paint, then built a custom mantel by gluing lauan plywood over the remaining brick surface and adding legs from 1-inch-thick MDF. The entire transformation cost just $87 — proof that a dramatic fireplace face-lift doesn’t require a big budget. (TOH Magazine, Jan 2013)
Troubleshooting Common Fireplace Issues
Even well-maintained fireplaces can experience problems. Knowing how to address common issues can help you properly maintain your fireplace. We’ll address two common issues below.
If your fireplace is smoking, check for:
- A closed or partially closed damper
- A cold flue (pre-warm it by burning newspaper)
- Improper chimney height
- Obstructions in the chimney
- Wet or unseasoned wood
Drafts can cause issues, such as inefficient burning and smoke problems. To fix a draft:
- Build smaller, hotter fires
- Check for and remove any chimney obstructions
- Consider installing a chimney cap to prevent downdrafts
- Ensure the damper is fully open
- Use well-seasoned hardwood
Repurposing an Unused Fireplace
You can repurpose your fireplace if you decide you don’t want to use it to build fires. We’ve listed a few creative ways to use your fireplace below. Some of these ideas are more functional, while others transform your unused fireplace into a unique design element.
Turn your fireplace into a conversation piece by:
- Creating a bookshelf with wooden shelves
- Displaying art or collectibles inside the hearth
- Installing a wine rack for an elegant storage solution
- Transforming it into a plant nook with potted plants or a terrarium
If you’re interested in using your fireplace in a more functional way, you can install an electric fireplace insert—or turn the hearth area into a cozy reading nook by adding some cushions and lighting.
DIY Fireplace Projects
If you’re looking for some DIY fireplace projects, you can:
- Add a new mantel or refinish your existing one
- Purchase a new fireplace screen or tools
- Update the hearth with a different tile or stone
Some fireplace projects require a professional’s experience, including:
- Installing a gas fireplace or converting from wood to gas
- Making major structural changes to the fireplace or chimney
- Performing extensive masonry work, such as repointing or rebuilding
- Repairing or replacing a damaged flue liner
Our Conclusion
A fireplace creates a cozy and warm atmosphere in any room. Not only are they functional, but they can enhance a home’s decor. Whether you have an electric, gas, or wood fireplace, you can protect your home and family by practicing fireplace safety precautions. By understanding the different fireplace components, homeowners can enjoy their fireplaces for years to come.
