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If your old fireplace is nothing but a cold, drafty hole in the wall, an electric insert turns it into a warm, glowing focal point in an afternoon — no chimney sweep, no gas line, no ashes. The catch is sizing: these units come in dozens of widths, depths, and heat outputs, and picking the wrong one means either a sloppy gap or a unit that won’t slide in at all. This guide walks you through the 10 inserts that owners actually swear by, with honest notes on fit, heat, and the sounds that make them feel like the real thing.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Finding the right electric fireplace insert with heater means measuring your opening first and matching heat output to your room size.
Our Picks at a Glance
How To Choose The Best Electric Fireplace Insert With Heater
Before you fall in love with a flame effect, grab a tape measure. The single biggest source of buyer regret here is ordering a unit that’s an inch too wide or too deep for the fireplace opening — it either won’t fit or leaves an ugly gap that needs a trim kit to cover.
Measure the opening, not the mantel
You need the width, height, and depth of the actual firebox cavity, not the decorative surround. Most inserts give you both an “overall dimension” and an “insert dimension” — the latter is what has to clear your opening. A unit that’s 32 inches wide overall might only need a 27-inch opening once the trim kit is on.
Match heat output to your room
Every insert on this list is a supplemental heater, not a furnace. The standard is 400 square feet of coverage at either 750W (low) or 1500W (high). If you’re heating a large open-concept space, look for higher BTU ratings — like the 5,386 BTUs on the infrared model that claims up to 1,000 square feet.
Decide how real you want it
Flame realism ranges from simple LED projections to multi-color dancing flames with glowing ember beds and crackling sound speakers. If you’re replacing a wood-burning fireplace you loved, spend the extra for the units with three-sided interiors and resin logs — the difference at dusk is dramatic.
Quick Comparison
| Model | Best For | Width | Heat Coverage | Heat Output (BTU) | Amazon |
|---|---|---|---|---|---|
| RICHFLAME Edward★ Best Overall | Replacing a wood-burning fireplace | 35″ | 400 sq ft | 5,000 | Amazon |
| COSTWAY 28.5″Best Value | Bedrooms and wall recessing | 28.5″ | 400 sq ft | — | Amazon |
| Sixfivsevn 31″Color King | Ultra-thin media walls | 31.8″ | 400 sq ft | 5,100 | Amazon |
| Kentsky 28″ | Flush built-in mantle look | 28.7″ | 400 sq ft | — | Amazon |
| LegendFlame Jaden 32″ | Adding trim kit to old fireplaces | 32″ | 400 sq ft | 5,100 | Amazon |
| LegendFlame Carl 28″ | Deep openings and mood lighting | 28.66″ | 400 sq ft | 5,000 | Amazon |
| Masarflame 36″ | Retro brick-style interiors | 35.6″ | 400 sq ft | 5,100 | Amazon |
| Ashley 31″ Infrared | Large rooms up to 1,000 sq ft | 31.25″ | 1,000 sq ft | 5,386 | Amazon |
| LegendFlame Austin 40″ | Smart home and app control | 40″ | 400 sq ft | 5,000 | Amazon |
| Westinghouse 50″ | Smart speakers and huge color range | 50″ | — | 5,110 | Amazon |
In‑Depth Reviews
1. RICHFLAME 33 Inches Edward Electric Fireplace Insert
Our pick — over 4.5★ from 500+ verified ratings; the strongest balance of quality and price.
The heavyweight that slides into your old wood-burning opening and makes the room feel finished the same day.
This 35-inch insert is the one buyers pick when they’re retiring a real wood fireplace and want the same visual presence without the mess. It’s a substantial 55.8 pounds, which tells you the build is solid — and the weathered concrete interior gives it a classy, contemporary look that owners call a major upgrade from old gas units. The 8.8-inch depth is worth noting: it’s deeper than several competitors on this list, so measure your firebox before committing.
Heat-wise you get two settings, 750W and 1500W, pushing 5,000 BTUs to warm up to 400 square feet. Buyers report it “fit as an insert to replace our wood burning fireplace” and that it takes the chill out of large rooms — though one noted a big living space still needs more. The three flame settings and log-burning sound run with or without heat, so you get the ambiance in summer too. The crackling speaker is the one thing owners are split on; some love it, others find it unconvincing, and you can simply turn it off.
It’s CSA certified with overheat protection, plugs into a standard 120V outlet on a 15-amp circuit, and the 6-foot power cable exits on the right side. The remote handset covers heat, flame, and sound from your chair. Given the huge praise for its looks — appearance is the number one thing owners rave about here — this is the pick that makes guests do a double-take.
What wins people over
- Weathered concrete interior and realistic flames that look convincing when burning
- True insert fit — slides into existing fireplace openings with no brackets needed
- 51-inch-wide presence at 35 inches that reads as a real fireplace
The trade-offs
- Heavy at 55.8 pounds — get help moving it into place
- Crackling sound speaker is the most common gripe; many just mute it
The verdict: if you’re converting a wood-burning fireplace and want the most realistic, substantial replacement, this is the one to beat.
Think twice if: your opening is under 8.5 inches deep — this unit needs the room.
2. COSTWAY 28.5-Inch Electric Fireplace Insert
A bedroom-sized insert that holds its heat and its price, with a thermostat that handles itself.
At 27.5 pounds, this 28.5-inch unit is a full 28.3 pounds lighter than the RICHFLAME above — easy for one person to lift into a recessed wall or an RV cabinet. Owners use it in master bedrooms and fireplaces alike, with one reporting it “keeps our room comfortable” in a 25×12 space. The best part of the experience is the thermostat: you set a temperature between 62°F and 82°F, and the unit turns itself on and off to hold it, which buyers genuinely love.
You get three flame colors and five brightness settings, so the look changes with your mood, plus a 0-8 hour countdown timer. Heat runs at 1500W high or 750W low to cover up to 400 square feet. The remote handles every mode, though some owners note the remote can’t set the temperature directly — that’s the main quirk. The flame realism is good but not the most lifelike on this list; one buyer called it “not the most realistic flames I’ve ever seen” while still being pleased.
ETL certification and overheat protection cover the safety side, and it’s designed for recessed mounting that fits most TV stands and entertainment centers. The lacquered finish keeps the minimalist look clean. For the price, this is the smart-money pick when you want solid heat, flexible controls, and a slim 6-inch depth.
The smart-money read: this one wins on versatility and self-regulating heat — the thermostat does the thinking for you.
The honest catch: the stabilizing feet are short, so it can feel a bit unsteady, and the blower is quiet but not silent.
3. Sixfivsevn 31-Inch Ultra-Thin Recessed Fireplace
The thinnest unit here at 4.33 inches deep, built to slip into a TV stand without surgery.
If your fireplace sits in a tight media wall, this insert slides into small TV stand bookcases and high-end entertainment centers for 86-inch TVs with no tools and no cutting — owners mention it fits perfectly. It weighs just 22 pounds and is only 4.33 inches deep, so it won’t hog your shelf space. The a neat extra is the color range: 12 adjustable flame and LED flame bed color modes reflected off crystal glass stone, giving a full-spectrum, semi-customizable glow that owners love changing to fit the mood.
Heat comes from 750W and 1500W settings with a 62°F to 82°F thermostat range, covering up to 400 square feet at 5,100 BTUs. It’s a 24-month warranty unit from the manufacturer, which is better than most here. The tempered glass front and metal body keep it looking sleek, and the sleep mode plus 0.5-9 hour timer are handy from bed — the whole point of the remote.
There are two honest caveats. First, there’s no automatic temperature shutoff — the timer works, but the thermostat won’t cycle the heat for you. Second, a small number of customers note creaking and popping noises that develop over months of use as the unit heats and cools. The majority are thrilled — it “instantly made the space feel more inviting” — but it’s worth knowing the longevity isn’t bulletproof for everyone.
Why it stands out
- Ultra-thin 4.33-inch depth fits bookcases and TV consoles other units can’t
- 12 flame and ember color modes with crystal glass reflection
- 24-month warranty gives longer coverage than most inserts
Worth knowing
- No auto temperature shutoff — the thermostat won’t cycle heat on its own
- A few reviewers point out developing creak and pop noises over time
Reach for this if: you need maximum color customization in a tight, shallow opening.
Look elsewhere if: you want set-and-forget thermostat control — this one relies on its timer.
4. Kentsky 28-Inch Recessed Electric Fireplace Insert
A built-in look with zero assembly — this one arrives ready to slide into your mantle.
This 28-inch insert gives you a clean, flush installation against your existing mantle. The overall dimension is 28.7″W x 21.4″H x 6.5″D, but the insert itself is 25.3″W x 20.1″H x 5.3″D — so a built-in trim covers the gap for a neat, recessed look. Owners consistently describe it as a perfect fit for their fireplace, with many noting it came completely assembled and required no work beyond sliding it in.
Heating is handled by quartz elements at 1500W or 750W, warming up to 400 square feet. There’s a 1-9 hour timer and an LCD display that shows your current settings, all reachable through both the remote and a touchscreen. The flame section includes 3 adjustable dancing flame colors and a glowing fuel bed with simulated wood logs — a vintage, nostalgic look that fits TV cabinets, bookshelves, and custom fireplace walls.
Buyers call it whisper-quiet and praise the near-silent operation, plus the flame-only mode that gives ambiance without heat. Reviews also highlight the company’s customer service — when one owner had an issue, a replacement unit shipped within 3 days. The main installation note: there’s no secure mounting method included, so a camper installation needed custom brackets for a solid hold.
The fit-first choice: the built-in trim cover and pre-assembled arrival make this the lowest-effort path to a polished, flush look.
Plan for: adding your own mounting brackets if you need a locked-in hold rather than a gravity fit.
5. LegendFlame Jaden 32-Inch Electric Fireplace Insert
The one that bridges mismatched openings with its included front trim kit.
The Jaden solves the classic insert problem — your fireplace opening is never exactly the unit’s size — by shipping with a trim kit: one top piece and two side pieces. With the trim attached, it measures 32 9/32″W x 21 27/32″H x 6″D, and without it, a slimmer 27″W x 19″H x 6″D. That flexibility means you fix the trim first, then slide the unit into your old opening for a finished look.
Heat output is 5,100 BTUs from 750W and 1500W settings covering up to 400 square feet — enough to “take the chill off” medium rooms, as owners put it, though the maker is clear this is not a primary heat source. The dimmable LED flame and glowing ember effect run with or without the heater, and a built-in speaker simulates charcoal cracking. One caveat: the digital flame isn’t the most photorealistic — some owners note it’s “not as real looking as I would have liked” — but the sound and warmth win people over.
The multifunctional remote has an LCD display and controls the timer, thermostat, crackle volume, flame intensity, and heat mode — no getting up needed. It’s CSA certified with a 1-year warranty, uses a standard 120V polarized plug on a 15-amp circuit, and has a 6-foot power cable at the top right. Owners repeatedly call it a great value for the price.
The strengths
- Included trim kit bridges gaps between your opening and the unit
- Remote with LCD controls timer, thermostat, and crackle volume
- 6-inch slim depth takes less room in the firebox
The trade-offs
- Flame realism is decent but not the most convincing on this list
- Trim kit may need light cutting to fit your exact opening
Best for: anyone with an odd-sized fireplace opening who wants a ready-made gap solution.
skip it if: photorealistic flames are your top priority — this one leans on sound and warmth instead.
6. LegendFlame Carl 28-Inch Electric Fireplace Insert
The deep-bodied showpiece with nine mood lights and a three-sided brick interior.
Where most inserts sit around 6 inches deep, the Carl goes to 10.39 inches — a genuinely deep body that fills bigger firebox openings and gives the flames room to look random and large. The three-sided interior brick wall and clean glass front trim create a built-in feel, and the life-like resin log is lit by nine mood light settings that make it look incredible when the flame is on. Owners call it the best-looking value among the models they compared, with one noting it beat out a gas conversion quote.
Flame control includes 4 brightness settings and a larger, more random flame pattern that shifts from celebratory to romantic to peaceful. The 5,000 BTU heater at 750W/1500W covers up to 400 square feet with an adjustable thermostat, and shoppers say gentle, effective heat in a 16×16 room. It’s a standard 120V 15-amp plug and is not hard-wire capable — plan your outlet placement accordingly.
The install is famously simple: owners describe sliding it in over a trim kit with no brick screws, and measuring the opening is the main prep. The heater is on the quieter side, though a few note it’s not the strongest blower and could raise the electric bill if run constantly. The glass front is solid and saved one buyer money versus models with extra trim. Looks built-in, feels high-end.
What makes it special
- Deep 10.39-inch body fits larger firebox openings beautifully
- Nine mood light settings make the resin log look incredible
- High-end glass front and frame read as a premium build
The honest notes
- Heater is effective but quiet and mild — not a powerhouse blower
- Not hard-wire capable; needs a nearby standard outlet
Choose this for: deep openings and owners who want a showpiece interior with mood lighting.
Consider otherwise if: you need maximum heating punch — this one is about ambiance with gentle warmth.
7. Masarflame 36-Inch Retro Recessed Fireplace Heater
A 35.6-inch wide presence with resin logs and a three-sided brick wall for old-house charm.
This 36-inch unit is built for the homeowner with a traditional brick fireplace who wants a retro-modern replacement. The three-sided interior brick wall and life-like resin logs with an ember bed create the look of a genuine masonry firebox, and owners say it matches beautifully with grey stonework. It’s a substantial 51.6 pounds and 8.84 inches deep, so it reads as a real fireplace rather than a thin TV insert.
The flame system offers 3 color atmosphere lights and 5 variable flame intensities, giving you real control over the glow. Heat is solid at 5,100 BTUs across 750W and 1500W settings, warming up to 400 square feet — one owner reported the high setting raised their whole house temperature by 2°F. The 8-hour timer and remote handle the routine, and the built-in speaker plays charcoal crackling for atmosphere.
The most common criticism is the crackling sound — several owners find it artificial, even static-like, and it’s the unit’s biggest mixed point. The flame quality itself gets strong praise, with buyers appreciating the different flame levels. Installation is straightforward but note the 6-foot power cable exits the right side, which may mean drilling a hole through your existing framing. Fits existing openings well and delivers “exceeded expectations” heat.
The retro pick: the brick interior and resin log set give this the most old-fireplace character on the list.
The honest catch: the crackling sound is the weak spot — most owners suggest keeping it off.
8. Signature Design by Ashley 31-Inch Infrared Insert
The only pick here that claims 1,000 square feet of warmth, thanks to infrared heating.
Every other insert on this list tops out at 400 square feet. The Ashley unit is different: its 1500W infrared heating element pushes up to 5,386 BTUs to warm spaces up to 1,000 square feet — and buyers confirm it heats up quickly and covers a good-size area. That makes it the clear choice for a large living room, open basement, or great room where the others would struggle. One owner notes it works best knocking the chill off 400-600 square feet, but claims go further.
If you want a TV stand installation, this unit measures 31″W x 9″D x 24″H and fits compatible Signature Design by Ashley media consoles perfectly — many buyers pair it with an Ashley TV stand for a smooth look. The realism comes from faux firebrick surround, dynamic glowing embers, and a realistic log set, with an LED multi-flame display that has 5 brightness levels and runs with or without heat. Owners call it quiet, with “no noise whatsoever.”
The remote includes an LED display, a 7-level temperature setting, and a timer programmable from 10 minutes to 9 hours. Infrared heats objects and surfaces directly rather than just the air, which is why buyers report a warm, comfortable room even at a moderate thermostat. There’s no crackling sound speaker here — it’s a silent unit by design, which some prefer. It arrives fully assembled; you place and secure it in the console.
The big advantages
- Infrared heat covers up to 1,000 sq ft — far beyond the standard 400
- Designed to fit Ashley TV consoles for a matched entertainment center
- Arrives fully assembled with tools included
What to know
- Heavy unit — moving and positioning takes two people
- No crackling sound effect; this one is silent by design
The choice for: large rooms where 400-square-foot coverage just won’t cut it.
Not for: anyone who specifically wants fire crackling audio — this unit has none.
9. LegendFlame Austin 40-Inch Recessed Fireplace
A 40-inch linear unit that recesses into the wall and answers to your voice.
This is the modern, built-in-wall statement piece. At 40 inches wide and just 5 25/32 inches deep, it sits nearly flush in a wall cavity or hangs on the wall — your choice — and the thin profile keeps it looking like a custom architectural element. It connects to Google Home and Alexa through the Tuya app, so you can adjust heat, light, and power by voice from across the room, and the app offers more settings than the remote. Owners love this control flexibility.
The flame system is the deepest on this list: multi-color flames and a fuel bed in 5 brightness settings, with your choice of a log set or crystal stone arrangement. Crackling sounds are included and can run with or without heat, across two settings (1500W high, 750W low) producing 5,000 BTUs for up to 400 square feet. The thermostat and countdown timer round out the package, and it’s clearly marked as supplemental heat, not a main source. The heat outlet sits at the middle top with air inlets beside it.
Owners consistently call the installation straightforward with thorough instructions, and it’s CSA certified with a 1-year warranty. Two electrical options — plug-in or hard-wiring — give you flexibility, and it runs on a standard 120V 15-amp circuit. The cons are minor: the space behind the glass is tight for positioning logs or rocks, and you’ll pay more for the build quality. Owners who upgraded from cheaper units call the flame effect the best they’ve seen.
Why it leads on tech
- Google Home and Alexa voice control plus a full-feature app
- Dual installation: in-wall recessed or wall-mounted
- Both plug-in and hard-wire electrical options
The trade-offs
- Premium price for the smart features and build
- Tight glass clearance makes arranging logs and rocks fiddly
Pick this for: a modern recessed wall installation where voice and app control matter.
Pass if: you want a simple plug-in insert you can ignore — this one’s features deserve daily use.
10. Westinghouse 50-Inch Smart Electric Fireplace
The 50-inch flagship with 144 color combinations and a 24-hour timer for serious customization.
If size and customization are your priorities, this is the biggest and most flexible unit on the list. At 50 inches wide, it fits a 49″ x 15″ x 6″ opening and offers up to 144 total color combinations for flames and embers, with 5 independent brightness levels and 5 flame burning speeds. You also get interchangeable faux log and crystal ember bed sets, so the whole look can shift from rustic to contemporary. Owners describe it as stunning and designer-approved, a real centerpiece.
It’s a true smart-home device: compatible with Alexa and Google Home, controllable through the Westinghouse app and the included remote. The built-in thermostat ranges from 62°F to 82°F to hold your preferred temperature, and the 24-hour timer is the longest on this list. Heat output is 5,110 BTUs at 750W/1500W — one owner said it “does a pretty good job of actually heating the room” through a winter, while being clear it’s not a sole heat source. It heats an entire open-concept house, per another.
The front measures 50″ x 15.75″ and the back install is 48.75″ x 14.35″ x 5.56″ for flush recessed mounting. It needs at least 11.8 inches of clearance from any ceiling or mantel above, and the maker warns against plugging other appliances into the same 120V 15A circuit. A recurring caution: the background finish scratches easily, so install it before adding decorative items. The crackling sound is absent here — this is a quiet, color-focused unit — which many owners prefer.
The flagship advantages
- 144 flame and ember color combinations — class-leading customization
- Alexa, Google Home, and app control for full smart-home integration
- 24-hour timer, the longest programmable range on this list
Handle with care
- Background finish scratches easily — install before adding items
- Needs 11.8″ clearance above; no crackling sound built in
Pick this if: you want the biggest canvas and the most color options, with full voice control.
Think twice if: you want fire audio or need a compact unit — this one is large and silent.
Understanding the Specs
BTU and Wattage
Heat output is measured in BTUs (British Thermal Units). Most inserts deliver around 5,000-5,100 BTUs from a 1500W high setting, covering roughly 400 square feet. The infrared model in this list reaches 5,386 BTUs and claims up to 1,000 square feet. Higher BTU means a larger room can be warmed, but always treat these as supplemental heat — the makers are clear none of these are primary heat sources.
Flame Effects and Realism
The “wow factor” comes from LED flame projections, log sets, and ember beds. Options range from 3 flame colors up to 12, and from basic projections to three-sided brick interiors with resin logs. if you want a quiet, color-shifting modern look or a crackling wood-burning feel depends on which visual and audio features matter most to you.
FAQ
How do I measure my fireplace opening for an insert?
Can an electric fireplace insert be a primary heat source?
What is the difference between 750W and 1500W heat settings?
Do I need a dedicated circuit for an electric fireplace insert?
Will the unit work without the heat on?
How much clearance do I need above the fireplace?
What is the difference between insert and wall mount installation?
Can these fireplaces connect to Alexa or Google Home?
Why is the crackling sound a mixed feature for some buyers?
What is the difference between quartz, infrared, and electric coil heating elements?
Final Thoughts: The Verdict
Across the board, the electric fireplace insert with heater winner is the RICHFLAME Edward because it delivers the most convincing wood-fireplace replacement — realistic flames, real heat, and a polished concrete interior that owners rave about. If you want smart-home control and the biggest color range, grab the Westinghouse 50-inch — its 144 color combinations and Alexa support are class-leading. And for a large room that the standard 400-square-foot inserts can’t handle, the Signature Design by Ashley Infrared is the one to reach for, with warmth up to 1,000 square feet. Measure your opening, match the heat to your space, and you’ll be enjoying the glow within an afternoon.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of August 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, Gardening Beyond earns from qualifying purchases. This does not affect which products we feature.