Key takeaways
- Opening size: Measure the width, height, and depth at several points, since older fireplace openings are rarely perfectly square. Allow enough room for ventilation and avoid forcing a unit into place.
- Heating performance: A 1,500-watt setting is commonly suited to supplemental heating in a modest room, but it should not be treated as a whole-home heating system. Use the lower setting when you want ambiance with less output.
- Insert or log set: A framed insert gives a finished, built-in appearance, while a log set is more flexible and can work well where the original fireplace surround should remain visible.
- Controls and timer: Remote controls, adjustable flame brightness, multiple colors, and timers make the fireplace easier to use from a sofa, screened porch entrance, or adjacent outdoor entertaining area.
- Safety and placement: Look for overheating protection, keep fabrics and furniture clear of the heater outlet, and confirm that the electrical cord can reach a suitable outlet without an extension cord unless the manufacturer explicitly permits one.
What's inside
Turning an open, drafty fireplace into a useful feature is not as simple as sliding in the first electric unit that fits the opening. Existing fireplaces vary widely in depth, width, hearth height, and clearance, while older masonry surrounds can make heat placement and cable routing more complicated than expected. For outdoor-living-minded homeowners, the goal is often a comfortable transition zone between the house and patio—not just a decorative flame effect.
This guide compares electric inserts and log-set-style heaters for existing fireplaces, focusing on fit, realistic flame presentation, sound, heating flexibility, controls, and practical installation considerations. Measure your opening carefully before ordering, and remember that an electric insert normally needs a properly located household outlet rather than a chimney connection.
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How to Choose a/an Electric Fireplace Insert For Existing Fireplace (2026)
- Opening size: Measure the width, height, and depth at several points, since older fireplace openings are rarely perfectly square. Allow enough room for ventilation and avoid forcing a unit into place.
- Heating performance: A 1,500-watt setting is commonly suited to supplemental heating in a modest room, but it should not be treated as a whole-home heating system. Use the lower setting when you want ambiance with less output.
- Insert or log set: A framed insert gives a finished, built-in appearance, while a log set is more flexible and can work well where the original fireplace surround should remain visible.
- Controls and timer: Remote controls, adjustable flame brightness, multiple colors, and timers make the fireplace easier to use from a sofa, screened porch entrance, or adjacent outdoor entertaining area.
- Safety and placement: Look for overheating protection, keep fabrics and furniture clear of the heater outlet, and confirm that the electrical cord can reach a suitable outlet without an extension cord unless the manufacturer explicitly permits one.
The Best Electric Fireplace Insert For Existing Fireplace (2026)s Reviewed
PuraFlame Western Electric Fireplace Insert
The Western is a strong all-around choice for a standard-size fireplace opening, with a 33 1/16-inch width and 25 9/16-inch height. Its 750/1500-watt heater, remote control, and fire-crackling sound create a more convincing fireside atmosphere, making it especially appealing in rooms that open toward a deck or covered patio.
PuraFlame Klaus Electric Fireplace Insert
The Klaus adds a glass door and mesh screen to the familiar PuraFlame insert format, giving the front a more traditional stove-like character. It is a good fit for homeowners who want a defined visual centerpiece, adjustable supplemental heat, and crackling audio without handling wood, ash, or chimney maintenance.
23-Inch Electric Fireplace Insert with Log Set
This compact 23-inch model is worth considering for narrower fireplaces or smaller living spaces. Adjustable flame brightness, an eight-hour timer, low-noise operation, a log set, and overheating protection make it a practical choice when you want straightforward controls and a less imposing installation.
Valuxhome 36-Inch Fireplace Insert
The Valuxhome is the better direction for a broad fireplace opening, with a 36-inch format that can provide a stronger visual presence across a larger wall. Its 750/1500-watt settings, remote control, crackling sound, and overheating protection cover the features most useful for relaxed evening gatherings indoors or near an enclosed outdoor-living area.
LegendFlame 23-Inch Free Standing Electric Log Set
The LegendFlame EF290 takes a different approach from a fully framed insert: its log-set design can preserve more of the original fireplace surround and create a flexible, open look. With 750/1500-watt heating, remote operation, and crackling sound, it suits buyers who want a simpler visual upgrade rather than a complete facade replacement.
Frequently Asked Questions
Can an electric insert go into an existing wood-burning fireplace?
Usually, yes, provided the unit fits the opening and has adequate clearance and electrical access. The chimney does not need to vent electric heat, but the fireplace should be clean, dry, and free from conditions that could damage the appliance or cord.
Do electric fireplace inserts need professional installation?
Many plug-in models are designed for straightforward placement, but professional help may be sensible if the outlet needs relocating, the fireplace has damaged masonry, or the insert requires a custom surround. Never modify the unit or block its ventilation openings to improve the fit.
Will an electric insert heat the whole room?
It can provide noticeable supplemental warmth in a suitably sized room, particularly near the fireplace. Performance depends on insulation, ceiling height, drafts, and room layout, so use the heater as a comfort boost rather than a replacement for central heating.
Are log-set models better than enclosed inserts?
Neither style is universally better. Log sets offer a more open appearance and can be easier to place, while enclosed inserts generally look more finished and can better cover the fireplace opening. Choose based on measurements, the surround’s condition, and the visual style you want.
Final Thoughts
For a polished, full-width installation, the PuraFlame Western is a compelling starting point, while the Klaus brings extra traditional character through its door and mesh screen. If your fireplace is wider, the Valuxhome 36-Inch deserves attention; for a smaller or more flexible opening, the compact LegendFlame log set is a practical alternative.
