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Last Updated on December 30, 2025 by Mark Jase
If you are searching for the best electric fireplace insert for existing fireplace designs, an indoor electric fireplace insert for existing fireplace setups offers both warmth and visual appeal without complicated installation.
Many homeowners choose an electric fireplace insert for existing fireplace with blower because it improves heat circulation and creates a comfortable atmosphere in medium to large rooms. Modern electric fire inserts for existing fireplaces feature adjustable flame settings, safety shutoff functions, and energy-efficient heating modes.
These units are built to fit traditional masonry openings while offering clean, low-maintenance operation that suits year-round ambiance. Selecting the right model ensures reliable performance, easy control, and a natural flame appearance that elevates any living space.
Through detailed comparison and user insights, we found some of the best electric fireplace insert for existing fireplace options are listed below.
# 32″ FLAME SHADE Electric Fireplace Insert – Best Electric Fireplace Insert for Existing Fireplace
This 32″ electric fireplace insert offers a compelling blend of powerful supplemental heat and ambience for existing fireplaces, making it a solid choice for those seeking electric fire inserts for existing fireplaces with real practicality. With 750 W and 1500 W heat settings, it can heat rooms up to 400 sq ft, providing adjustable warmth where you need it most. The 1 – 8 hour timer and 6 brightness levels let you tailor the flame effect for day or night, while the remote control makes it easy to adjust settings without leaving your seat. The tempered safety glass and ETL certification ensure peace of mind during operation. This indoor electric fireplace insert for existing fireplace combines efficient zone heating with adjustable flame visuals that look great year-round — even without heat.
User Experiences: Positive feedback praises the quiet heating and instant warm-up, and many users highlight the realistic flame effects and customizable brightness that enhance their living space.
Key Benefits
- Adjustable 750/1500 W heat
- 6 flame brightness settings
- Remote-controlled timer and thermostat
- ETL certified safety design
Compatible For
- Existing wood or gas fireplaces
- Living room hearth upgrades
- Bedrooms and family rooms
- Cozy zone heating
Special Note: Ensure you measure your fireplace opening carefully before buying; installation dimensions matter for a seamless fit.
# Touchstone Fireplug 24″ Electric Fireplace Insert – Smart Electric Fire Insert
This Touchstone Fireplug 24″ electric fireplace insert converts an existing masonry fireplace into a high-tech indoor electric fireplace with Wi-Fi and Alexa compatibility — perfect for modern smart homes. With 6 flame colors and 13 ember options, plus crackling fire sound and an adjustable timer, it delivers beautiful flame visuals that you can enjoy with or without heat. The unit stays cool to the touch on the sides and back, making it safer around kids and pets. Its 1500 W heater with thermostat control supports supplemental heating in colder months, and the included trim kits help create a polished finished look when installed in your hearth. This electric fire insert for existing fireplaces blends smart-home convenience with warmth and ambiance enhancement.
User Experiences: Homeowners appreciate the Alexa integration and soothing flame tones, calling out how easy it is to update an unused fireplace to something stylish and functional.
Key Benefits
- Alexa and Wi-Fi enabled control
- Multiple flame & ember color options
- Safe, cool-touch design
- Remote and app controls
Compatible For
- Existing masonry fireplaces
- Smart home setups
- Alexa/Google Assistant homes
- Living rooms and dens
Special Note: Smart features require compatible devices and setup through an app prior to use.
# Benrocks 36″ Electric Fireplace Insert with Glass Door & Mesh Screen
The Benrocks 36″ electric fireplace insert combines a premium look with rich features, ideal for filling a large existing fireplace opening with style. This insert features dual heater settings (750 W/1500 W) for efficient room heating and LED flame effects in multiple colors that operate independently from the heat. Its tempered glass and mesh screen design enhances aesthetics and blends classic fireplace elements with modern electric convenience. A remote control, 1-9 hour timer, and built-in log-speaker sound offer both ambience and functionality in one package. You can use this electric fire insert with or without heat, making it versatile for all seasons.
User Experiences: Users highlight the attractive glass-door design and authentic flame plus crackling sound combination, noting the enhanced decor and warmth it brings to living spaces.
Key Benefits
- Dual heat modes
- Realistic flame & log sounds
- Stylish glass door display
- 1-9 hour timer
Compatible For
- Large existing hearths
- Living room focal points
- Fireplace wall installations
- Traditional or modern decors
Special Note: Larger size means you must confirm firebox dimensions before purchase.
# 23″ Electric Fireplace Insert – Compact Insert with 8 Flame Colors
For smaller fireplace openings, this 23″ electric fireplace insert delivers 8 flame color options and 1400 W heating power with overheat protection and remote control. Designed for indoor electric fireplace insert for existing fireplace setups, it features sidelight accents and a user-friendly timer to manage usage. The heater offers ample warmth for moderate-sized rooms, while the adjustable flame colors allow customization of mood and ambience. This unit provides an affordable yet functional solution for transforming unused hearths into a cozy focal point in your home.
User Experiences: Customers often mention the easy installation and variety of flame colors that allow creative mood lighting, even when the heat function isn’t in use.
Key Benefits
- 8 flame color selections
- 1400 W heat output
- Remote control convenience
- Overheat protection
Compatible For
- Small fireplace openings
- Apartments and condos
- Bedroom fireplaces
- Secondary heating zones
Special Note: Compact size may not suit large fireplaces without trim kits.
# 18″ Recessed Electric Fireplace Insert – 3D Realistic Flame Heater
This 18″ recessed electric fireplace insert features a 3D realistic flame effect combined with 1400 W heating power, perfect for cozy corners or smaller existing fireplaces. Its sleek design ensures a modern look while delivering steady warmth and captivating visual flame effects. Overheat protection gives added peace of mind, and the remote control enhances convenience for adjusting settings from across the room. It’s a good option for apartments, small living rooms, or bedroom installations where both heat and flame realism matter.
User Experiences: Many buyers note the immersive 3D flame visuals and how they elevate the look of an existing fireplace without complex installation.
Key Benefits
- 3D flame effects
- 1400 W heater
- Remote control included
- Compact recessed design
Compatible For
- Small firebox cavities
- Bedrooms and dens
- Modern décor spaces
- Supplemental heat areas
Special Note: Smallest of the group; not ideal for large living rooms without additional supplemental heat.
Why Choosing the Best Electric Fireplace Insert for Existing Fireplace Matters
Picking the right insert feels like a simple upgrade, but it shapes the comfort, warmth, and atmosphere of your whole living space. A fireplace often acts like the heartbeat of a room, so the insert you choose needs to match the way you live. Some folks want strong heat on chilly evenings, while others just want a soft glow that makes the room feel calmer. Both goals make sense, and the right insert can accomplish either one without fuss.
A solid unit also brings safety to the table. An insert with reliable protection systems and clean heat output gives peace of mind, especially if kids or pets wander close to the hearth. The wrong insert might cause rattling noises, poor airflow, or weak flame visuals that feel flat and artificial. A well-matched model offers balanced heating, lower energy use, and a flame display that actually looks alive.
Well, the biggest motivator is convenience. You go from dealing with ash, soot, and smoke to pressing a button and watching the room glow. No hauling wood, no sweeping afterward, no sparks leaping out. Just steady warmth and adjustable flames that fit different moods. For anyone updating an older fireplace, the right insert makes the entire hearth feel refreshed and modern again.
Key Factors to Check Before Buying an Electric Fireplace Insert
• Heating wattage needed for your room size
• Flame realism and color adjustments
• Noise level during heat or blower operation
• Remote control range and responsiveness
• Fitment dimensions for your fireplace opening
• Presence of timer settings for nightly use
• Safety shutoff systems
• Blower strength for stronger room heat
• Power cord length for convenient positioning
• Type of flame bed logs, crystals, or hybrid
How to Install an Electric Fireplace Insert in an Existing Fireplace Safely
Step 1
Clear the firebox of any debris, soot, or leftover material so the insert can sit flat on all sides.
Step 2
Check the power outlet location. Many people place a slim extension through the side of the hearth, but a recessed outlet behind the insert works even better.
Step 3
Slide the insert into the opening slowly and guide the cord out so it does not snag or fold too sharply.
Step 4
Attach mounting brackets if your model includes them. They help prevent shifting over time.
Step 5
Confirm the unit is level. A slight tilt can affect flame projection and create uneven reflections.
Step 6
Turn on the flame mode before heat. This helps you verify that the insert is centered and visually aligned.
Step 7
Check heat flow on low and high settings. Air should push outward into the room instead of back toward the fireplace walls.
Best Electric Fireplace Insert for Existing Fireplace: What Fits Your Space?
| Fireplace Size | Recommended Insert Width | Best Feature Match | Notes |
|---|---|---|---|
| Small hearths | 18–23 inches | Gentle heat settings | Great for bedrooms or compact dens |
| Medium hearths | 25–30 inches | Balanced flame realism | Works well in apartments or midsize homes |
| Large hearths | 32–36 inches | Flame customization and strong blower | Ideal for spacious living rooms |
| Extra-wide hearths | 40–50 inches | Multi-color flame systems | Best option for modern open layouts |
Heating Performance and Flame Realism: What You Should Expect
Heat Strength
A well-built insert pushes warm air evenly across the room instead of forming hot pockets near the hearth. A 1400 to 1500 watt system usually suits living rooms and open spaces, while smaller wattage inserts work well in tighter rooms. Many models add a blower to help move heat farther, which can make a noticeable difference on cooler nights.
Visual Flame Quality
Good flame projection feels organic, not stiff or repetitive. Some units mix different brightness levels, shifting colors, and layered effects to create depth behind the glass. Those small details keep the fireplace from feeling like a simple display. The more customization the insert offers, the easier it becomes to match different moods in your home.
Year-Round Use
Many folks enjoy flame-only mode during warmer months. The best units keep this mode quiet and smooth, letting you enjoy the ambience without heat. A soft glow on a summer evening can actually make the room feel calmer without affecting temperature.
User-Friendly Features That Make a Fireplace Insert Worth Buying
• Remote control with clear buttons
• Full screen brightness adjustments
• Timer shutoff for overnight use
• Quiet flame motor and blower
• Flame-only mode for warm seasons
• Easy-reach control panel
• Multiple heat levels
• Memory function for previous settings
Who Should Buy an Electric Fireplace Insert—and Who Should Avoid It
| Ideal For | Not Ideal For |
|---|---|
| Homeowners updating an old masonry hearth | People wanting real wood scent or smoke |
| Renters needing a no-chimney solution | Those expecting whole-house heating |
| Anyone tired of sweeping ash | Homes without available wall outlets nearby |
| People wanting quiet ambiance | Users who prefer intense wood-fire heat |
| Apartments or condos with no venting | People seeking rugged outdoorsy fires |
Maintenance Routine for Longer-Lasting Electric Fireplace Inserts
Step 1
Unplug before touching anything. Basic safety always helps.
Step 2
Wipe the glass gently with a soft cloth. Avoid harsh sprays that streak or cloud the surface.
Step 3
Dust the vents carefully. Clear airflow keeps the heater from getting stressed.
Step 4
Inspect the power cord for bends or wear. A quick check takes seconds and prevents risk.
Step 5
Turn on flame mode occasionally during off-season. It keeps internal motors from stiffening.
Step 6
Loosen any visible debris inside the firebox with a dry cloth. Keeping the chamber clean preserves the flame reflection.
Safety Tips to Follow Before and After Installation
• Keep curtains several inches away from the heater vent
• Do not connect to overloaded power strips
• Let children view flames from a short distance to avoid accidental touches
• Keep the blower vent unobstructed
• Set timers during nighttime use
• Position furniture far enough that airflow remains open
• Inspect glass temperature before leaning near it
Final Buying Checklist for the Right Electric Fireplace Insert
| Feature | Must-Have | Nice-to-Have |
|---|---|---|
| Flame realism | Yes | Adjustable colors |
| Heat settings | High and low | Thermostat modes |
| Blower | Strong airflow | Ultra quiet models |
| Timer function | 1 to 9 hours | Multi-stage scheduling |
| Safety shutoff | Required | Cool-touch front |
| Installation fit | Exact size | Trim kits |
FAQs
How much heat can an insert typically produce?
Most units operate between 750 and 1500 watts. That is usually enough for small to medium rooms.
Does an insert need venting?
No venting is needed because they run on clean electrical heat.
Can I leave the flame effect running for long periods?
Yes, the flame effect uses low wattage and stays safe with proper airflow.
Will the glass become hot during use?
Some models get mildly warm, but many stay comfortable to touch because of improved airflow systems.
Can the insert run from a normal household outlet?
Yes, they plug into standard home outlets.
Summary
A well-matched electric insert brings comfort, easier upkeep, and greater flexibility for your home. You gain adjustable flames, steady warmth, and reliable safety features without dealing with soot or wood storage. The right model transforms an older fireplace into a cozy spot for relaxing evenings, family gatherings, or quiet nights with soft lighting. With the proper size and settings, your hearth becomes one of the most enjoyable places in your home.
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