Best Fireplace Inserts for Existing Fireplaces: Top Electric Options
Transform your existing fireplace into a cozy, modern centerpiece with an electric insert. The following picks are designed to fit a range of openings, offer realistic flame effects, remote control, and energy-efficient operation. Each option provides year-round ambiance, with or without heat, so you can enjoy the look of a wood fire without the mess. Below is a quick overview of five top contenders to consider for your space.
| Product | Brand | Key Feature | Approx. Size (W x H) |
|---|---|---|---|
| PuraFlame Western Electric Fireplace Insert | PuraFlame | Three flame intensities, LED, realistic log set | 32 1/8″ W x 25 9/16″ H |
| LegendFlame EF290 | Legend Flame | Crackling sound, remote control, up to 400 sq ft | 23″ W x 20″ H |
| Giantex 28.5″ Electric Fireplace Insert | Giantex | 3 flame colors, 5 brightness levels, timer | 28.5″ W x unspecified height |
| PuraFlame Klaus Electric Fireplace Insert | PuraFlame | Glass door and mesh, 2 heat settings | 33 1/16″ W x 25 9/16″ H |
| Masarflame 36″ Electric Fireplace Insert | Masarflame | Retro brick-wall design, remote, timer | 32.6″–32.7″ L x 26.4″–26.5″ H |
PuraFlame Western Electric Fireplace Insert

Overall dimensions: 35 1/16″ W x 26 31/32″ H x 8 25/32″ D. Firebox: 32 1/8″ W x 25 9/16″ H x 7 51/64″ D. Suggest confirming opening fit before purchase. Features three flame intensities usable with or without heat; 100% LED energy saving. Includes a three-sided interior brick wall and glass front trim for a modern look. A life-like resin log sits on the ember bed, enhancing realism.
LegendFlame EF290 23″ Electric Fireplace Insert

Firebox size is compact, intended for openings where space is limited. The unit delivers a realistic flame from resin logs with ember bed, and supports 750W/1500W heat with a remote. It provides heat for rooms up to 400 square feet and can operate with or without heat. It uses standard 120V power and is designed for simple installation as a freestanding insert within an existing opening.
Giantex 28.5″ Electric Fireplace Insert

Features include a life-like flame effect visible through tempered glass, with three color options (orange-red, blue, orange-blue-red mix) and five brightness levels. It offers two heat modes (750W and 1500W) and a timer. The decorative flame can be used without heating, and the unit is suitable for wall-recessed or freestanding installation in many openings.
PuraFlame Klaus Electric Fireplace Insert

Overall dimensions: 35.04″ W x 26.96″ H x 8.78″ D. Three flame settings with variable intensity and brightness, usable with or without heat. LED technology is energy-saving. A traditional antique look is complemented by a three-sided interior brick wall, glass door, and mesh screen for a realistic fireplace appearance with minimal maintenance.
Masarflame 36″ Electric Fireplace Insert

Insert dimensions: 32.6″–32.7″ L x 26.4″–26.5″ H with a 750/1500W heater and a 6-foot power cord. Features LIFE-LIKE resin logs, ember bed, and three-sided brick wall design. Five flame intensity options alongside a timer provide flexible decor for year-round use. No smoke or ash generation, suitable for retrofitting larger existing openings.
Buying Guide: Key Purchase Considerations
Choosing the right fireplace insert involves aligning dimensions, heat needs, and aesthetics with your living space. Consider fit: measure your current opening precisely and compare with the insert’s front dimensions and insert depth. Heat output matters: 750W and 1500W options typically cover 400 sq ft rooms, but verify your space size and insulation. Installation: some models are designed for simple freestanding placement, while others require built-in mounting or cabinet integration. Flame realism: LED flame colors, speed, and brightness enhance ambiance; many units allow flame use with no heat for year-round use.
Energy and maintenance: LED technology reduces energy use, and most inserts eliminate real-wood mess. Controls vary from handheld remotes to wall-mounted panels; check for timers and auto-shutoff features. Safety: ensure proper clearance from combustibles, secure mounting, and that the unit has overheating protection. Warranty and availability: confirm product warranty terms and the availability of replacement parts or logs. Finally, consider style: brick interior, glass doors, and mesh screens contribute to a authentic look that matches your existing fireplace aesthetic.