Best Electric Heater Inserts for Fireplaces

Electric heater inserts transform unused fireplaces into safe, efficient supplemental heat sources and cozy focal points. Below is a quick comparison of five highly relevant electric fireplace inserts selected for reliability, flame realism, and heating performance.

Use the sections below to compare individual product specifications, features, and installation suitability for common fireplace openings and room sizes.

Electactic 21″ Electric Fireplace Insert

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This 21-inch freestanding log heater is designed for small to medium openings and offers two heat settings: 750W and 1500W. The unit provides five adjustable flame brightness and flicker speed settings, enabling visual customization without producing combustion byproducts.

Safety features include overheat protection and auto shutoff. The insert is cool-to-the-touch which reduces burn risk around children and pets. A remote control allows for convenient operation of heat and flame functions.

Installation is straightforward for freestanding placement inside an existing fireplace or mantel opening. Intended as a supplemental heater, the unit is suitable for focused heating rather than primary whole-house warmth.

LegendFlame 25″ Free Standing Log Set

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The LegendFlame 25″ model is sized at 25″ W x 20″ H x 10″ D and suits a variety of existing openings. It uses energy-saving LED lighting for flame effects and can operate the flames with or without the heater function year-round.

Its features list includes a realistic resin log set with ember bed, optional crackling sound, and the ability to provide supplemental heat for rooms up to about 400 square feet. The product uses a standard 120V polarized plug and is designed for low-maintenance operation.

Because it is freestanding, installation is typically a matter of placing the unit inside an opening and plugging in. The design targets consumers who want realistic visuals combined with occasional heating capacity.

Duraflame Electric Log Set For 1,000 Sq Ft

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Duraflame’s insert emphasizes supplemental heating capacity with infrared heating rated for up to 1,000 square feet. The log set features LED flame visuals paired with a crackling sound effect to simulate a real wood fire atmosphere.

The remote control adjusts thermostat, flame brightness, flame speed, timer, and crackling volume. The unit is intended to reduce reliance on central heating by warming targeted areas and lowering overall energy consumption when used correctly.

Noted for being suitable for existing fireplaces, this log set aims to provide both ambiance and consistent infrared heat distribution, beneficial for rooms where direct warmth is prioritized.

PuraFlame Western Electric Fireplace Insert

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PuraFlame’s Western insert is a larger option with overall dimensions near 35″ W x 27″ H, and a specified firebox width of 32 1/8″. It supports three flame intensity levels and LED flame effects that operate with or without heat.

The unit features a life-like resin log and a three-sided interior brick wall aesthetic behind a clean glass front. The manufacturer advises verifying opening dimensions before ordering due to the larger size.

Its design targets users who want a prominent visual presence along with variable heating modes. The insert’s size and trim may suit larger mantels or remodels where an authentic, built-in appearance is desired.

BELLEZE 23″ Electric Fireplace Insert

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BELLEZE’s 23″ insert offers a combination of practical controls and safety certifications. It includes a 1–8 hour timer, four brightness levels, adjustable temperature from 64°F to 82°F, and CSA/UL certification for indoor use.

The LED flame source claims a long service life, and the unit includes crackling sound that can be toggled. Rated at roughly 1400W operation, the insert is promoted as a smoke-free, low-maintenance alternative to wood-burning fireplaces.

This unit is intended to fit various spaces with compact dimensions and provides a good balance of adjustability, sensor-driven temperature control, and recognized safety standards for indoor electrical appliances.

Buying Guide: How To Choose An Electric Fireplace Insert

Selecting the right electric fireplace insert requires assessing three core categories: fit and installation, heating performance, and visual and control features. Below are practical considerations and comparison perspectives to inform your purchase.

Fit And Installation

• Measure Your Opening: Record width, height, and depth of the fireplace opening or mantel cavity. Some units list overall and firebox dimensions—match these to avoid returns.
• Freestanding Vs. Recessed: Freestanding inserts are easier to place and remove; recessed or built-in models require precise sizing or professional installation.
• Ventilation And Clearance: While electric inserts don’t need chimneys, follow manufacturer clearance and mounting instructions for safe operation and to avoid heat damage to surrounding materials.

Heating Performance

• Wattage And Coverage: Many inserts offer 750W–1500W settings. Higher wattage increases heat output; look for stated coverage (e.g., 400–1000 sq ft) to match room size.
• Heating Technology: Infrared heaters typically provide more direct, penetrating warmth and can feel more consistent for larger rooms; convection-style heaters warm air and are effective for spot heating.
• Supplemental Use Only: Electric inserts are generally designed as supplemental heat sources, not primary heating systems. Consider your home’s insulation and heating needs before relying solely on an insert.

Visuals, Ambiance, And Controls

• Flame Options: Adjustable brightness, color modes, and flicker speed affect realism. Decide if you want flames usable without heat for year-round ambience.
• Sound Effects: Crackling sound can add realism. Confirm whether the sound is adjustable or optional if you prefer silence.
• Remote And Smart Controls: Remote control is standard; some models include app or Wi‑Fi integration. Choose according to convenience preferences.

Safety And Certifications

• Overheat Protection And Auto Shutoff: Look for built-in protection features to prevent overheating during extended use.
• UL/CSA Certification: Certification indicates compliance with recognized safety standards. This is particularly important for appliances installed near combustible materials.

Durability And Maintenance

• LED Lifespan: LED-based flame systems generally last longer and consume less energy than incandescent alternatives.
• Material Quality: Resin logs and ember beds vary in finish and detail. Inspect images and product specs to evaluate perceived realism and build quality.
• Filter Or Fan Access: Check whether the unit offers accessible airflow paths for cleaning or has washable filters to maintain performance over time.

Comparison Perspectives

• Small Openings: Choose compact freestanding models with clear dimensions, like the 21″ Electactic or 23″ BELLEZE for narrow mantels.
• Large Visual Presence: Larger inserts such as PuraFlame fit wider openings and provide a built-in look suitable for remodeled fireplaces.
• Maximum Heat Coverage: For larger rooms, infrared-rated models like the Duraflame 1,000 sq ft option offer broader heating reach.
• Energy Savings: Use insert heating only in occupied zones and lower central thermostat settings to realize cost savings; LED visuals minimize standing electricity use when flame-only mode is used.

Practical Selection Checklist

1. Measure opening (width, height, depth).
2. Match wattage/coverage to room size and insulation.
3. Confirm safety certifications and overheat protection.
4. Decide on desired flame realism and sound options.
5. Check control options: remote, timer, thermostat, app.
6. Review installation type: freestanding, recessed, or built-in.

Using this checklist helps compare models across fit, function, and safety dimensions to find an insert aligned with your space and heating goals.