Best Electric Fireplace Insert

TL;DR

The “best” electric fireplace insert is the one that physically fits your firebox (including depth and any taper) and matches how you’ll actually use it — real supplemental heat vs mostly ambiance. After fit, prioritize safety listing (UL/ETL), controls you’ll use daily (thermostat, timer, flame-only mode), and warranty/parts support so you don’t end up tearing out a built-in later.

Top Recommended Electric Fireplace Inserts

Top Pick: Best Overall Electric Fireplace Insert

Modern Ember Uptown 36 Smart Electric Fireplace Insert

Best for: A living room remodel where you want an insert look (not a freestanding stove) plus app/voice control, and you have a fairly square, non-tapered cavity to slide it into.

The Good

• Customer experience points to strong “out of the box” aesthetics — especially the included log set.
• Smart-control angle is a standout for this category, with Alexa/Wi‑Fi mentioned in product positioning and buyer expectations.
• Good fit for homeowners who want year-round ambiance (flame effect) and occasional zone heat, rather than replacing a central heater.
• Works well as a clean retrofit when you can route the cord safely and keep intake/exhaust vents unobstructed behind a surround.

The Bad

• Multiple buyer reviews warn it’s not tapered at the back — a common deal-breaker for older masonry fireplaces that narrow toward the rear.
• Some installations may show unwanted reflections/glare that can break the illusion in certain rooms (think glossy paint, low ceilings, or a TV mounted above).
• If you’re sensitive to “fake flame” looks, you’ll want to scrutinize real-room videos and be realistic about what LED effects can (and can’t) do.

Our Take: If your firebox is truly square and you want smart controls for daily convenience in a primary living space, this is a solid overall pick — but treat “fit” as the first filter, not an afterthought.

REMII DEEP

Best for: A deeper, built-in feature wall where you’re planning a more permanent install (for example, during a basement refinish where you’re already opening walls and adding blocking).

The Good

• Brand positions this as part of a broader built-in fireplace lineup, which is useful if you’re comparing sizes/finishes across a consistent family.
• “Deep” orientation can be a practical match for feature-wall builds where you can control cavity depth (instead of forcing a unit into a shallow, tapered masonry opening).
• Better suited to projects where an HVAC contractor or licensed electrician is already involved and you want a more architectural look than a budget insert.
• Good candidate to compare against cheaper inserts if long-term serviceability matters (built-ins are painful to remove if something fails later).

The Bad

• We don’t have the same volume of homeowner reports here, so we can’t speak confidently to things like fan noise, flame realism in daylight, or long-run reliability.
• Pricing and final cost can be less predictable than Amazon-style inserts (often varying by size/config and where you buy).

Our Take: If you’re designing a deeper wall cavity (not trying to fit an old tapered firebox), this is worth shortlisting — just confirm exact cut-sheet dimensions and electrical requirements before framing.

FAQ

How do I measure my firebox correctly (including depth and taper)?

Measure opening width (left-to-right at the front), opening height (floor to lintel), and depth in at least two places: near the opening and again at the back wall. Many older masonry fireplaces taper (narrow) toward the rear, so a “boxy” insert that isn’t tapered may physically jam even if the front opening looks big enough. If you’re unsure what clearances you need for airflow and safe operation, follow the unit’s manual and, for built-in work, run the plan by a licensed electrician (NEC-certified).

Do electric fireplace inserts actually heat a room?

They can provide supplemental zone heat, similar to a space heater, but they’re not a whole-house heating solution. Performance depends on the heater design, thermostat behavior, and your room’s insulation and air sealing — plus how open the space is (a closed bedroom is easier than an open-plan great room). For safety mindset and placement/clearance habits, it’s smart to treat inserts like any other portable heater and follow guidance from the U.S. Consumer Product Safety Commission (space heater safety).

Can I run the flames without heat?

Many inserts offer a flame-only mode so you can use the visual effect year-round. That usually cuts power use dramatically versus running the resistance heater, but the exact difference depends on the unit’s lighting/flame system and brightness settings. If flame-only use is a priority (for example, in a Florida condo where heat is rarely needed), confirm flame-only mode is explicitly supported and easy to toggle from the remote/app.

Do I need a dedicated outlet or circuit for an electric fireplace insert?

Many models are 120V plug-in, but you still need a properly grounded receptacle and a circuit that can handle the load without nuisance trips — especially if the same circuit is already feeding a TV, console, or gaming setup. Avoid extension cords and power strips unless the manufacturer explicitly allows them, since overheating and voltage drop are real risks with space-heater loads. The NFPA’s home heating safety guidance is a good baseline for safe habits around heaters.

When should I call an electrician or contractor for install?

Call a licensed electrician (NEC-certified) if you need a new receptacle added inside the firebox cavity, you’re unsure about circuit capacity, or cord routing would be pinched by a surround. For built-ins and framing changes (like a feature wall), an experienced remodeler or HVAC contractor (NATE-certified) can help with layout so you don’t block intake/exhaust vents or create heat traps. The goal is safe airflow and service access later — not just making the opening look clean.

What flame technologies look most realistic?

Inserts generally use LED lighting with reflectors/projection and sometimes moving components to simulate flame. Realism depends heavily on room lighting, viewing angle, and reflections (for example, glossy surfaces or low ceilings can reveal artifacts). When comparing, prioritize real-room videos and homeowner reports about glare or “seeing the mechanism” rather than relying on staged product photos; safety certification (UL/ETL) matters for the heater portion regardless of flame style, which ties back to baseline standards like UL’s electric fireplace/heater safety scopes.

What warranty and parts support should I prioritize for a built-in installation?

For a built-in, prioritize a brand that’s clear about warranty length, how service is handled, and whether replacement parts (like remotes, LEDs, or heater assemblies) are obtainable without tearing out the whole unit. This matters more than small differences in wattage because the cost of failure is often the labor and finish work to remove the insert. If you’re committing to a custom surround, choose the product you’ll still be able to service years from now.

Bottom Line

If we’re picking one for most homes shopping in this shortlist, the Modern Ember Uptown 36 Smart Electric Fireplace Insert stands out for looks and smart-control convenience. Just measure carefully — especially for depth and taper — because homeowner reports flag fit issues in tapered masonry fireboxes, and a poor fit can turn a simple upgrade into a return and rework.

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