Fireboxes & Inserts

291 products

291 products
Sale
Monessen Exacta 42" Vent Free Firebox BUF42
Monessen Exacta 42" Vent Free Firebox BUF42
Monessen
from $928.00 Regular price $1,254.05 Save 26%
Osburn Matrix 2700 Wood Insert OB02700
Osburn Matrix 2700 Wood Insert OB02700
Osburn Matrix 2700 Wood Insert OB02700
Osburn
$4,199.00
Osburn 2000 Wood Insert OB02016
Osburn 2000 Wood Insert OB02016
Osburn 2000 Wood Insert OB02016
Osburn
$2,829.00
Sale
Monessen Exacta 36" Vent Free Firebox BUF36
Monessen Exacta 36" Vent Free Firebox BUF36
Monessen
from $828.00 Regular price $1,118.92 Save 26%
Sale
Monessen Attribute 32" Vent Free Firebox ACUF32
Monessen Attribute 32" Vent Free Firebox ACUF32
Monessen
from $839.00 Regular price $1,093.24 Save 23%

🔥 High-Quality Fireplace Inserts & Fireboxes for Every Home

Looking to upgrade your fireplace without the cost and hassle of a complete rebuild? Fireplace inserts and fireboxes offer an efficient, affordable way to revitalize your space while improving heat output and safety. At Flame Authority, we carry a wide range of electricgas, and wood-burning inserts — plus pre-engineered fireboxes for easy installation.

Whether you're replacing an old fireplace or building something new, this collection has solutions designed for both traditional and modern spaces.

Need help understanding the difference between inserts and fireboxes? Start with our complete guide to fireplace inserts for a full breakdown.


What Are Fireplace Inserts and Fireboxes?

A fireplace insert is a self-contained unit that fits into an existing fireplace opening. Designed to increase heating efficiency, inserts come in various fuel types, including

Inserts are perfect for homeowners who want to convert a drafty wood fireplace into a more energy-efficient heat source. To learn more about how inserts can improve performance and reduce energy loss, read our comparison of fireplace types.

A firebox, on the other hand, is the inner chamber where combustion occurs. Fireboxes are typically used in new construction or remodels and can be paired with decorative surrounds, mantels, or built-in cabinetry.


Types of Fireplace Inserts Available

We carry a variety of insert types to suit your home’s design and heating needs:

Electric Inserts – Simple to install, zero-emissions, and highly efficient. These are ideal for apartments, condos, or homes where venting is limited. For design inspiration, explore our wall-mounted fireplace collection or read our electric fireplace mastery guide.

Gas Inserts – Available in direct vent and ventless models, gas inserts offer powerful heat with convenient control. For questions about safety and ventilation, check out our guide to vented gas fireplaces.

Wood Inserts – Perfect for those who want the authentic crackle of a fire with modern efficiency. Combine your insert with a stylish wood mantel shelf or traditional fireplace surround for a timeless look.


Key Benefits of Fireplace Inserts

Adding or upgrading a fireplace insert offers several benefits:

  • Improved Efficiency: Inserts are designed to maximize heat output while reducing heat loss.
  • Cleaner Operation: Electric and gas models produce fewer emissions and require less cleanup than traditional wood-burning fireplaces.
  • Easy Upgrades: Inserts fit into most existing fireplaces, making them a cost-effective renovation option.
  • Flexible Design: Choose from classic, modern, or transitional styles to match your home décor.

To understand how inserts compare to traditional fireplaces, we recommend reading our article on the benefits of console fireplaces and how they integrate into modern living spaces.


Choosing the Right Insert or Firebox

When selecting a fireplace insert or firebox, consider the following:

  • Fuel Type: Do you prefer gas, wood, or electric? Each has its own pros and cons. Learn more about fireplace fuel types to make an informed decision.
  • Installation Style: Do you need a built-in insert, a plug-and-play electric unit, or a freestanding option?
  • Room Size & Heating Needs: Not all inserts are equal when it comes to heat output. For help, check out our guide to BTU ratings.
  • Design & Layout: Inserts come in various styles and dimensions. Make sure to measure your space and check manufacturer specs before purchasing.

Still unsure? Our indoor fireplace guide walks you through everything from sizing to installation tips.


Complete Your Fireplace Setup

Once you’ve selected your insert or firebox, don’t forget to explore:

Looking for modern inspiration? Our fireplace trends guide offers creative ideas to enhance both form and function.


🔥 Shop Fireplace Inserts & Fireboxes Now

Explore our full collection of fireboxes and fireplace inserts and find the perfect upgrade for your home. Whether you're adding ambiance to your living room or replacing an outdated fireplace, Flame Authority has the quality brands and expert guidance to help you do it right.

From sleek electric models to powerful wood and gas options, our inserts deliver the warmth, efficiency, and elegance you’re looking for—all backed by outstanding support and trusted performance.