Electric Fireplace Sizes Explained: From Compact to Extra Large

Last reviewed: October 14, 2026

Electric fireplace size should be judged against the wall it sits on and the TV above it, not the square footage of the room. Manufacturers such as Modern Flames suggest roughly 2 to 3 feet wide for a bedroom and up to nearly 5 feet for a family room with a 15 to 20 foot wall, which is why the same 50-inch fireplace can look balanced in one room and undersized in another.

Sizes run from compact units of around 26 inches to extra-large builds of 90 inches and up. Here is where each band fits.

Decide the installation type before the width

Installation type changes how a given width reads in a room, which is why it should be settled first. A 60-inch wall-mounted fireplace and a 60-inch built-in look and feel different in the same space.

A built-in fireplace is framed into a wall, cabinet, or media feature. Because it becomes part of the room design, you can usually go wider without it feeling out of place. A wall-mounted fireplace sits on the surface like a large piece of decor, so the width has to feel balanced against the wall, the furniture, and the TV. An insert is different again: the existing opening decides the size for you.

Ask one question before comparing widths: are you building this into a wall, mounting it on a wall, or fitting it into an existing opening? Our comparison of built-in vs wall mounted electric fireplaces covers the tradeoff.

Depth is a size too

Wall depth decides whether a recessed unit can sit flush, and it is the dimension most often skipped. A standard interior wall framed with 2x4 studs gives about 3.5 inches of cavity, and many built-in fireplaces need considerably more.

Say you choose a deep built-in unit and then find about 6 inches of cavity where the spec sheet calls for 12. The fix is framing the wall out, which means drywall, framing, and finish work that was never in the plan.

Find the required depth on the spec sheet, measure your actual cavity, and if the numbers do not match, decide whether to build out or choose a shallower model.

26 to 35 inches

Fireplaces in the 26 to 35 inch range suit bedrooms, home offices, apartments, condos, and existing fireplace openings. This size adds a focal point without taking over the wall.

It becomes a mistake on a wide, empty wall, where a small fireplace reads like a picture frame hung in the wrong place. For an existing opening, measure before shopping, because for inserts the physical fit matters more than the visual width. Compare the 26 to 35 inch collection, or start with inserts if this is a conversion.

36 to 49 inches

The 36 to 49 inch range suits smaller living rooms, apartments, secondary sitting areas, and many existing fireplace openings. It is large enough to feel intentional without needing a custom build-out.

Watch proportion. Under a 70-inch TV, a 36-inch fireplace looks undersized, while on a narrower wall with a modest mantel the same unit looks right. Browse the 36 to 49 inch collection to compare.

50 to 59 inches

The 50 to 59 inch range suits many standard living rooms. It is wide enough to feel substantial without designing the room around it.

This band works below a TV, on a media console, or as a simple wall-mounted focal point. A 50-inch fireplace is not automatically small; in the right room it looks clean and deliberate. See the 50 to 59 inch collection.

60 to 69 inches

At 60 to 69 inches, electric fireplaces start to feel architectural rather than decorative. This is where most built-in fireplace walls and media walls begin to look intentional.

It suits larger living rooms, framed installations, and modern linear designs where the fireplace anchors the space. Modern Flames is built around these projects. Compare the 60 to 69 inch collection, and see best electric fireplace brands if you are still comparing.

70 to 79 inches

The 70 to 79 inch range is for wide feature walls and open living spaces where a 60-inch unit would look underwhelming. This is a design decision more than a sizing one.

The common error is buying the fireplace first and designing the wall around it afterward. Reverse that: decide where the TV goes, how wide the wall is, whether there will be cabinetry, and whether the fireplace is centered, before choosing the model. Browse the 70 to 79 inch collection and the Linear Electric Fireplaces collection.

80 to 89 inches

Fireplaces from 80 to 89 inches are feature pieces for large open-concept rooms, wide media walls, and spaces with full wall treatments in stone, tile, or millwork.

They look excellent when the room supports them and forced when it does not. A larger fireplace should look like it belongs to the room. See the 80 to 89 inch collection.

90 inches and up

The 90-inch-and-up range is the statement category, built for oversized feature walls, luxury living spaces, restaurants, hotels, and custom homes where the fireplace is part of the architecture.

Installation planning matters more at this scale. Framing, electrical placement, TV height, finish materials, and wall proportions all have to be worked out together. Start with the extra large collection.

What size fireplace goes under a TV

A fireplace under a TV should be close to the width of the screen or slightly wider. It does not need to match exactly, but it should not look small next to the screen.

A 50 to 59 inch fireplace works with smaller and mid-size TVs, and a 60 to 69 inch unit suits many standard living room setups. From 70 inches up, an installation starts to read as custom and built-in. Height matters as much as width: do not mount the TV too high just because the fireplace sits below it. Read can you mount a TV above an electric fireplace before locking in the design.

Inserts are sized differently

With an insert, the existing fireplace opening determines the size rather than the wall or the room. Measure before shopping, not after.

You need the opening width, height, and depth, plus surround or trim space, outlet access, and clearance around the firebox. An insert that almost fits does not fit. Start with electric fireplace inserts, and if you are building a new frame, see how to build a frame for an electric fireplace insert.

Common sizing mistakes

Five mistakes account for most sizing regret, and each has a straightforward fix.

Assuming bigger is better. Sometimes it is. Sometimes it makes the room feel awkward. Match the scale of the wall, not the budget.

Choosing width before installation style. The same width reads differently mounted on a wall versus built into one.

Undersizing a wide wall. A small fireplace under a large TV on a wide wall looks unfinished.

Ignoring the surrounding materials. Tile, stone, cabinetry, shelving, and wall color all change how large the fireplace reads.

Treating width and heat as the same decision. The heater is a separate component from the flame display, so check the wattage and BTU figures on the model's spec sheet instead of inferring heat from width. See how much space an electric fireplace can really heat, and our operating-cost guide for running costs.

Frequently asked questions

What is the most common electric fireplace size?

Many living-room projects land between 50 and 69 inches, because that width works under many TVs and on standard walls without a custom build. Units from 26 to 49 inches suit bedrooms, offices, and existing fireplace openings. We do not track a single most common size, so measure your wall first.

What size electric fireplace should I get for a media wall?

Start around 60 inches for a media wall and go up from there. The 60 to 69 inch and 70 to 79 inch bands cover many built-in TV wall projects, while large or open-concept spaces often need 80 inches or more. Measure the wall width first, since that governs proportion more than room size does.

Is a 50-inch electric fireplace big enough?

A 50-inch fireplace is big enough for bedrooms, apartments, smaller living rooms, and many TV wall setups. It can look undersized on a very wide wall or in a large open-concept room. Compare the 50 to 59 inch collection against the wider bands before deciding.

What size electric fireplace goes under a 65-inch TV?

A 50 to 60 inch fireplace works under a 65-inch TV in most rooms, depending on the wall and layout. For a more balanced built-in look, 60 inches or wider usually reads better because the fireplace then matches or exceeds the screen width. Check the mounting height as well as the width.

Are 100-inch electric fireplaces too big for homes?

Not necessarily. A 100-inch fireplace suits large homes, open living rooms, luxury media walls, and commercial-style spaces where the room has the scale to carry it. It is usually too large for small rooms or narrow walls. For that scale, start with the extra large collection.

Do larger electric fireplaces heat more space?

Not necessarily. Heat output comes from the heater, which is a separate component from the flame display, so a wider fireplace does not automatically produce more warmth. Check the wattage and BTU figures on the specific model's spec sheet rather than inferring heat from width.

What size electric fireplace insert do I need?

For inserts, the existing opening decides. Measure the width, height, and depth of the opening, plus clearance and outlet access, before comparing models. The best insert is the one that fits properly, which is a fit question rather than a design one.

Where to go from here

Start with the project rather than the number. Once you know whether you are mounting on a wall, building into one, or replacing an existing opening, and once you have measured the wall width and depth, the size decision usually resolves itself. If you are early in the process, compare built-in, wall mounted, and insert options, or tell us about your room.