Fireplace inserts are a popular upgrade for homeowners who want to refresh an outdated fireplace without a full renovation. But can you put a fireplace insert in an existing fireplace? The short answer is yes, and doing so can transform your old hearth into an efficient, reliable source of heat.
If you’re thinking about replacing your fireplace, this guide will walk you through how inserts fit into existing masonry fireplaces, what types are available and what to consider before installation. By the end, you’ll know exactly what’s possible, and why a Forge & Flame fireplace insert may be the perfect fit for your home.
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Can Fireplace Inserts Go Into an Existing Fireplace?
Yes, you can install a fireplace insert into most existing masonry fireplaces. In fact, inserts are specifically designed for this purpose. They fit directly into your current firebox and connect to your chimney through a properly sized liner system.
While some minor modifications may be needed for safety and performance, inserts are typically a simple, cost-effective way to upgrade your fireplace. Most installations can be completed in a day by a professional technician. The result is a more efficient, cleaner-burning system that retains the classic look of a built-in hearth while delivering modern heating performance.
Can You Put a Wood-Burning Fireplace Insert in an Existing Fireplace?
Yes, a wood-burning fireplace insert can be installed inside an existing masonry fireplace with the right venting and chimney liner. The liner helps maintain draft efficiency and directs exhaust safely outside.
Wood-burning inserts are a favorite among homeowners who love the look and feel of wood burning flames. They offer higher heat output and efficiency than an open fireplace, which can lose up to 80% of its heat through the chimney. With the right insert, you’ll enjoy the same authentic wood fire experience as you would with a fireplace without sacrificing performance or safety.
Can You Put a Pellet Fireplace Insert in an Existing Fireplace?
A pellet fireplace insert is another excellent choice for an existing fireplace. Instead of logs, these units burn compressed wood pellets, which are efficient and easy to store. Pellet inserts often require access to an electrical outlet to power the feed system and fans, but installation is still straightforward.
These inserts are prized for their convenience—just load the hopper, set the thermostat and enjoy steady, hands-free heat. They are perfect for homeowners who want the warmth of a fire with less maintenance.
Read more in Comparing Fireplace Inserts: What’s Best for You?
Advantages of Adding a Fireplace Insert Into an Existing Fireplace
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Upgrading your traditional fireplace with an insert brings both practical and aesthetic benefits. Whether wood-burning or pellet-based, inserts dramatically improve the way your home uses heat.
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Higher Efficiency: Fireplace inserts are designed to trap and circulate heat rather than lose it up the chimney, converting up to 70–80% of fuel into usable warmth.
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Lower Heating Costs: Because they’re more efficient, inserts reduce the need for supplemental heating, saving money on energy bills through colder months.
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Cleaner Burning: Inserts minimize smoke, soot and creosote buildup, keeping your air cleaner and your chimney safer.
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Elevated Design: Forge & Flame inserts offer timeless craftsmanship and modern design options to match your home’s aesthetic.
Learn more in Fireplace Technology: Gas Direct Vent
Tips on Replacing a Fireplace with a Fireplace Insert
If you’re ready to replace your current fireplace, these tips will help you plan your installation confidently.
1. Measure carefully. Take precise measurements of your existing firebox (height, width and depth) to ensure your insert fits properly.
2. Hire a certified installer. Professional installation ensures safety, correct venting and compliance with local building codes.
3. Choose the right liner. A stainless steel chimney liner is typically required to connect your insert safely to the flue.
4. Burn properly seasoned wood. If selecting a wood insert, always use dry, seasoned firewood to reduce smoke and improve performance.
5. Schedule maintenance. Annual cleaning and inspections keep your insert performing safely and efficiently.
Contact a Dealer to Get the Right Forge & Flame Fireplace Insert for Your Space
A fireplace insert is one of the most effective ways to breathe new life into your existing fireplace, offering modern efficiency, timeless design and lasting warmth. Whether you prefer the tradition of wood or the ease of pellets, Forge & Flame has an insert designed for your space and style.
Ready to transform your fireplace?
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