
Electric fireplace inserts are a great way to add warmth and beauty to your home. They are safer and simpler to install than traditional fireplaces, as well as being cleaner due to the lack of soot or ashes. When choosing an electric fireplace insert, it is important to consider the size of the room and the fireplace opening to ensure the insert fits correctly and can efficiently heat the space. The key factors in selecting the right size insert are the dimensions of the fireplace opening, also known as the firebox or cavity, and the square footage of the room.
| Characteristics | Values |
|---|---|
| Safety | Electric fireplace inserts are safer because they don't produce sparks or smoke. |
| Installation | Simple to install and plug into an electrical outlet. |
| Cleanliness | Cleaner because they don't produce soot or ashes. |
| Portability | Great for renters because you can just unplug and remove the insert when moving. |
| Features | Some electric fireplace inserts have adjustable flame colour, flicker, and height. |
| Features | Some have a dimmer control to adjust the brightness of the flame. |
| Features | Some have crackling sound effects. |
| Features | Some allow the flame or heat functions to be used separately or together. |
| Size | The size of the room will determine the number of BTUs required. |
| Room shape | The shape of the room will affect the way you calculate the area. |
| Clearance | Some electric inserts require no clearance, but a general rule of thumb is to allow all inserts 1-2 inches of clearance space. |
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What You'll Learn

Measure the room's square footage
To size an electric fireplace insert, you need to first measure the square footage of the room. This is an important step in any home improvement project as it helps you get the right amount of materials for your project.
To calculate the square footage of a room, you need to measure the length and width of the room. Locate the longest side of the room and measure it with a tape measure or another measuring tool. This is your length. Next, locate the shortest side of the room and measure it. This is your width.
If your room is rectangular, multiply the length and width to get the area in square feet. For example, if your room is 12 feet long and 10 feet wide, the area is 120 square feet.
If your room has an odd shape, such as an L-shape, divide the room into square or rectangular sections and calculate the square footage of each section. Then, add the square footages of each section to get the total square footage of the room. For example, if your room has a large rectangle and a smaller rectangle, and you need to buy flooring for the room, you would calculate the square footage of each rectangle and then add them together to get the total square footage.
You can also calculate the square footage of a room in square inches or square centimeters and then convert your answer to square feet.
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Calculate BTUs needed
When it comes to sizing an electric fireplace insert, one of the most important considerations is calculating the number of BTUs (British Thermal Units) needed. BTU is a unit of energy, specifically referring to the amount of energy required to heat one pound of water by one Fahrenheit. In the context of fireplaces, a higher number of BTUs indicates a higher heat output.
To determine the required BTUs for your electric fireplace insert, you should consider the square footage of the area you want to heat. Online BTU calculators can assist in this process by taking into account various factors, such as room size and climate conditions. These calculators are designed to help you select the appropriate fireplace insert size for your space.
Additionally, variables such as climate, insulation, weatherproofing, ceiling height, and floor plan openness can influence the heating of a space. For instance, if you live in a colder climate, you may require a fireplace insert with a higher BTU output to adequately heat your home.
It's worth noting that fireplace inserts are often used as supplemental heat sources or for zone heating, resulting in temperature differences of around 15°F–25°F. Manufacturers design their equipment with versatility in mind, incorporating features like adjustable gas valves and remote controls that allow you to regulate the amount of heat output.
When in doubt, it is recommended to consult with a hearth expert or your local fireplace dealer to ensure you choose the most suitable BTU output for your specific needs and space requirements. They can guide you in selecting the appropriate fireplace insert model and provide insights based on their expertise and your unique circumstances.
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Measure the firebox/cavity
To size an electric fireplace insert, begin by measuring the firebox or cavity where you plan to install the insert. This step is crucial to ensure you select an insert that fits perfectly into your existing fireplace. Here are the steps to follow:
- Clear the Firebox: Start by removing any debris, ashes, or leftover fuel sources from the firebox. If there are any remnants of a previous fireplace insert, make sure to clear them away to create a clean slate for taking measurements.
- Measure Width and Height: Use a measuring tape to determine the width and height of the firebox opening. Place the tape measure at the back of the firebox and extend it to the front, ensuring that you measure across the narrowest points. Take multiple measurements at different heights to account for any irregularities in the firebox shape. Record the smallest width measurement, as this will be the most restrictive dimension when choosing an insert.
- Assess Depth: Measure the depth of the firebox from the back wall to the front edge. If there are any obstructions, such as a hearth or mantel, take measurements from multiple points to ensure you have the deepest and most accurate depth reading. It is important to leave at least 2 inches of space between the insert and any combustible materials, so factor this into your calculations.
- Consider Clearance: Check the manufacturer's instructions for your chosen electric fireplace insert to understand their specific clearance requirements. Some inserts may require additional space behind, above, or to the sides to accommodate components like fans, vents, or wiring. Make sure to account for these clearances when measuring and selecting an appropriately sized insert.
- Cross-Reference with Insert Sizes: With your measurements in hand, you can now refer to the sizes of electric fireplace inserts on the market. Standard sizes typically range from 26 to 36 inches in width and 20 to 29 inches in height. Compare your firebox dimensions with the insert sizes, looking for a model that fits within the parameters you've measured.
- Account for Installation Requirements: Keep in mind that some inserts may have specific installation requirements. For example, certain models might need to be hardwired into your electrical system, which could impact placement and sizing considerations. Always refer to the manufacturer's instructions and consult with a professional if you're unsure about installation requirements.
By carefully measuring your firebox or cavity and cross-referencing your measurements with electric fireplace insert sizes, you can make an informed decision about the best-sized insert for your space. Remember to consider clearance requirements and installation needs to ensure a safe and functional setup.
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Account for clearance space
When installing an electric fireplace insert, it is crucial to account for clearance space to ensure safe and efficient operation. Here are some detailed instructions and considerations for addressing the clearance space requirements:
Firstly, determine the type of electric fireplace insert you intend to install. Different types of inserts, such as plug-in or hardwired models, may have specific clearance requirements. Familiarize yourself with the manufacturer's instructions and specifications for your particular model. These instructions will provide essential information about the necessary clearance space around the unit for proper ventilation and heat dissipation.
The surrounding materials and surfaces play a significant role in determining the required clearance space. Electric fireplace inserts generate heat, and it is vital to maintain a safe distance from combustible materials such as wood, drywall, or fabric. Typically, there should be a minimum distance of 12 inches (30.48 cm) between the insert and any combustible materials. This distance may vary depending on the manufacturer's instructions and the specific model, so always refer to the provided guidelines.
Additionally, consider any built-in features or accessories that may protrude from the fireplace insert. These could include doors, handles, or decorative elements. Ensure that there is sufficient clearance space to accommodate these protrusions without obstruction. This consideration is particularly important if you plan to install the insert in an existing fireplace cavity or a custom-built surround. Measure the depth of the cavity or the thickness of the surround to ensure it can accommodate the insert with adequate clearance.
Ventilation is another critical factor to consider. Electric fireplace inserts require proper ventilation to prevent overheating and ensure optimal performance. Ensure that there is enough space around the insert to facilitate adequate airflow. This may involve leaving a specific clearance above the unit, usually a minimum of 6 inches (15.24 cm), to allow heat to rise and escape. Additionally, maintain a clear path for airflow around the sides and back of the insert, following the manufacturer's recommendations for optimal ventilation.
Lastly, take into account any <
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Choose an insert with features like sound effects
Electric fireplace inserts are a great way to create a cosy and welcoming ambiance in your home. They are easy to install, require minimal upkeep, and are environmentally sustainable. When choosing an electric fireplace insert, consider selecting one with additional features, such as sound effects.
The crackling fire sound effects offered by some electric fireplace inserts, such as the Vermont 30" insert, can enhance the overall experience, making it even more enjoyable and lifelike. This particular model also has a quiet, fan-forced heater with adjustable settings for even heat distribution, and a no-heat option, allowing you to enjoy the warm glow of the flames without the warmth, perfect for those warmer months.
The safety features of electric fireplace inserts with sound effects are also worth noting. For example, the Vermont 30" insert has an automatic shut-off feature to prevent overheating, making it safe for kids, pets, and the elderly. Additionally, with over 90% less energy consumption than gas, you can enjoy a reduced electric bill while staying warm and cosy.
When it comes to installation, electric fireplace inserts are versatile and can be installed in various spaces, including guest rooms, basements, garages, apartments, workplaces, and even motorhomes or RVs. The lightweight construction of the Vermont 30" insert, for instance, makes installation easy and convenient, and its universal style suits any space.
Overall, choosing an electric fireplace insert with sound effects can elevate your experience, providing both the look and feel of a conventional fireplace without the associated complexities and maintenance.
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Frequently asked questions
Measure the length and width of the room in feet. Multiply these numbers to get the square feet. Then multiply that number by 20 to get the minimum number of BTUs needed to heat the room.
BTUs are British Thermal Units. The larger the room, the more BTUs you will need.
Measure the firebox or cavity at different points to get accurate dimensions.
Electric fireplace inserts are safer, cleaner, and easier to install than other types of inserts. They don't produce sparks or smoke, and they don't have soot or ashes. They can also be unplugged and removed easily.











































