10 Best Electric Fireplace Insert For Existing Fireplace 2025 in the United States

The PuraFlame Western Electric Fireplace Insert is a solid option for those looking to enhance their existing fireplace with a modern touch. With dimensions of 35 1/16” wide and 26 31/32” high, it fits well in many standard fireplace openings, but it's essential to measure your space before purchasing. This insert has a heating capacity of up to 400 square feet, making it suitable for medium-sized rooms, but it should serve as a supplemental heat source rather than the primary one.

One of its standout features is the realistic flame effect with adjustable intensity, which can be enjoyed year-round whether the heat is on or off. The LED technology ensures energy efficiency, so you can save on electricity costs while enjoying the ambiance of a fire. Additionally, the unit includes a remote control for convenient operation and an adjustable thermostat for personalized comfort.

In terms of installation, the insert is designed to be user-friendly. It can be easily plugged in and doesn’t require hard wiring, making it a hassle-free addition to your home. However, the insert's weight of nearly 47 pounds may require assistance during setup. While the flame effect is visually appealing, it might not completely replicate the warmth and aroma of a traditional wood-burning fireplace, which some may miss. Also, the plastic components, such as the resin log, might not appeal to everyone looking for a more authentic look. Safety features are adequate, but users should always prioritize installation in accordance with the provided guidelines.

The Dimplex Revillusion 36" Built-in Firebox is a solid choice for upgrading an existing fireplace with an electric insert. It fits into standard fireplace openings with its 37-inch width and 12-inch depth, allowing for flexible installation—you can surface mount it or recess it fully for a clean built-in look. Heating-wise, it covers about 440 square feet with up to 2575 watts of power, making it suitable to comfortably warm a medium-sized living room.

A standout feature is the flame effect, which uses a Mirage Flame Panel with partially frosted acrylic to create a realistic, reflection-free flame appearance that adds a cozy ambiance without requiring a real fire. The unit includes a thermostat and remote control, making it easy to adjust heat and flame settings from across the room. Safety is addressed with vent-free operation, which simplifies installation since no external venting is required, though usage guidelines for indoor air quality should still be followed. Energy efficiency is reasonable for an electric heater of this size, though power consumption increases at higher heat settings.

The unit carries a two-year warranty, indicating reliability. At nearly 75 pounds, it is somewhat heavy, so professional installation might be advisable. While the firebox provides good heat, it may not be adequate for larger open-plan spaces. The elegant herringbone design may not suit every decor style. This fireplace insert is ideal for users who want a realistic flame effect and dependable heating for a medium-sized room, along with straightforward installation options and remote comfort control.

The PuraFlame Western 33" Electric Fireplace Insert is designed to fit an existing fireplace space with overall dimensions of 44.1" wide, 31.5" high, and 8.8" deep. It offers a realistic flame effect with three settings for intensity and brightness, and its resin log and ember bed mimic the look of a wood-burning fireplace. The insert also includes a remote control for convenience and an adjustable thermostat, allowing it to provide supplemental heat for rooms up to 400 sq. ft. However, it is not intended as a primary heat source.

Installation is straightforward as the unit can be placed directly on the floor and plugged into a standard 120V outlet, but it cannot be hard-wired, which might limit placement options for some users. The unit is energy-efficient, utilizing LED technology for flame effects, and comes with safety features like a cool-touch surface and overheat protection.

Some potential downsides include its inability to serve as a main heat source and the fact that it comes in two packages, which may arrive on different days. Additionally, while customer service is noted as responsive, the one-year warranty might seem limited compared to other products in the market.