When choosing a built-in electric fireplace, the layout decision has more practical consequences than most buyers expect. A 3 sided electric fireplace opens flame visibility to the full room, which changes how seating works, how the unit is framed, and how deep the wall cavity needs to be. A single-sided model installs into a standard wall and delivers a clean focal point from one direction. Both use the same electric heating technology, require no venting, and need no combustion fuel. What differs is the structural commitment, price point, and the room configurations where each actually works.
Single-sided built-in electric fireplaces cover a wide price range. The Modern Flames Landscape Pro Slim starts at $2,299 for the 44" model and scales with width. Most single-sided linear models in a comparable quality tier run $1,500 to $4,500 depending on brand, size, and flame technology.
A Popular Choice: Modern Flames Landscape Pro Slim, recesses into a standard 2x6 wall at 5.5" deep
3-sided models carry a price premium. The Modern Flames Landscape Pro Multi starts at $2,779 for the 44" model, roughly 20% more than the equivalent single-sided Slim. The Amantii Signature TruView Series, a hybrid that pairs LED electric flame with Dimplex Optimyst vapor technology, starts at $4,599 for the 55" model.
Installation costs also run higher for 3-sided units. A bay configuration requires roughly 12" of housing depth, compared to 5.5" for a standard single-sided built-in. Retrofitting an existing wall to accommodate that depth typically means building a custom column or partition rather than cutting into a standard stud wall.
Both layouts use PTC ceramic electric heating, which converts electricity to heat at close to 100% efficiency. Neither loses energy through a flue or combustion process, and neither requires fuel beyond the electrical supply.
The primary running-cost variable is heat output. Most single-sided models run on a single dedicated 120V/15A circuit, producing up to 5,000 BTU. The Landscape Pro Multi supports an optional 240V secondary line that raises output to 10,000 BTU, which changes the operating cost equation in a large open-plan space where a 5,000 BTU unit would run continuously at full load.
In flame-only mode with heating off, both types draw approximately 15 to 30 watts, making them practical for year-round ambiance use without meaningful impact on electricity bills.
At standard 120V, most built-in electric fireplaces cover roughly 400 to 500 sq. ft. regardless of whether they are single-sided or 3-sided. The gap opens with high-output options: the Landscape Pro Multi at 240V dual-line covers up to 800 sq. ft., making it one of the few electric fireplaces capable of functioning as a primary heat source in a large open-plan area.
Heat dispersion also differs by layout. In a 3-sided configuration, warmth radiates outward from three glass faces rather than forward from one. In an open-plan space with seating arranged around the fireplace, this distributes heat more evenly across the room. In a narrower space where you want directional warmth toward a defined seating area, a single-sided model concentrates output better.
Neither type requires venting. No flue, no gas line, no combustion byproducts. The installation involves framing and electrical work only.
A single-sided built-in recesses into a 2x6 stud wall at approximately 5.5" of depth. The Landscape Pro Slim is engineered for this specifically: it flush-mounts into a standard-framed wall with no structural modifications beyond opening the cavity and running a dedicated 15A/120V circuit. This makes it practical for most existing homes without altering wall framing.
A 3-sided bay installation is more involved. The Landscape Pro Multi in full bay configuration requires approximately 12" of housing depth. Standard 2x6 walls cannot accommodate this without modification. Most 3-sided installations go into a purpose-built column, partial wall, or entertainment structure, which is easiest to plan during new construction or a full renovation. Retrofitting into an existing wall is possible but typically involves building out rather than cutting in.
Electrical planning matters more for 3-sided units with high-output options. The Landscape Pro Multi standard operation runs on a 15A/120V dedicated circuit, the same as most single-sided models. The optional 240V second line for 10,000 BTU output requires a separate circuit roughed in during framing before drywall is installed.
A Standout Pick: Modern Flames Landscape Pro Multi, configurable as single-sided, corner, or full 3-sided bay
Ongoing maintenance is minimal for both types. No ash, no creosote, no combustion residue to deal with. Routine care means wiping down glass panels with a dry microfiber cloth and keeping air intake vents clear of dust buildup.
3-sided models have more glass surface to maintain: three panels in a bay configuration versus one in a standard front-facing unit. The exposed side panels also collect dust more readily than a recessed single-sided model. The Amantii Signature TruView adds one additional maintenance task: its Optimyst vapor system uses an ultrasonic water reservoir that requires periodic refilling and occasional descaling, with frequency depending on local water hardness.
Safety certifications apply consistently across both configurations. The Landscape Pro Slim, Landscape Pro Multi, and Amantii Signature TruView all carry UL Listing. Confirm UL Listed or ETL Certified labeling before purchasing any built-in electric fireplace, as it verifies the unit has been tested to the applicable safety standards for recessed or built-in installation conditions.
A single-sided model is the better fit when you are installing into an existing wall with limited depth, when seating faces one direction, when budget is a constraint, or when you want heat concentrated toward a defined area. The Landscape Pro Slim handles sizes from 44" to 96", recesses cleanly into a standard wall, and uses the same Hybrid-FX flame technology as the Multi at a lower starting price.
A 3-sided model is the right choice when the fireplace will sit in a column or partial wall projecting into the room, when seating surrounds the unit from more than one direction, or when the fireplace is intended as an architectural focal point visible from across the room. The Landscape Pro Multi is the most flexible option in this category: it can be configured as single-sided, left corner, right corner, or full 3-sided bay during framing, which means the same unit works across multiple layout scenarios without changing the hardware.
For buyers where flame realism is the priority over heating performance, the Amantii Signature TruView delivers vapor-based flame presentation that standard LED projection does not replicate. The Optimyst water vapor rises from the log media and dissipates naturally, creating visible depth in the firebox. The tradeoff is a higher starting price and ongoing maintenance of the water system.
Worth Considering: Amantii Signature TruView, 3-sided vapor and LED hybrid, available in 55" and 75"
Browse available 3-sided electric fireplaces at The Fireplace USA or explore the full built-in electric fireplace collection for single-sided and multi-sided options.
Yes. This is one of the primary use cases for 3-sided models. Installed in a column or partial wall projecting into an open-plan space, a 3-sided electric fireplace provides flame visibility from multiple directions without requiring a solid wall behind it. The Landscape Pro Multi supports this configuration through its modular installation system.
At minimum, they require a dedicated 120V/15A circuit, the same as most single-sided models. Some 3-sided units, including the Landscape Pro Multi, support an optional 240V secondary line for doubled heat output. If you plan to use that option, the second circuit needs to be roughed in during framing before drywall is installed.
Generally, yes. The bay configuration requires approximately 12" of wall depth, which standard 2x6 framing cannot accommodate without modification. Most 3-sided installations require a custom column, partial wall, or entertainment structure. The carpentry scope is larger than a single-sided recess, though the project remains significantly simpler than a gas fireplace installation requiring venting and a dedicated gas supply line.
The Modern Flames Landscape Pro Multi is available in 44", 56", 68", 80", 96", and 120" widths. The Amantii Signature TruView comes in 55" and 75". Options from other brands start around 30" to 36" for smaller column or peninsula installations.
Yes. The Landscape Pro Multi supports single-sided, left corner, right corner, and full 3-sided configurations. The layout is determined by how the surrounding enclosure is framed, not by the unit itself. This makes it a practical choice even when the final configuration is uncertain at the time of purchase.
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