To replace an electric fire in a media wall without a rebuild, match the new unit's rough-opening and cavity depth, not its advertised size. Three popular "60-inch" built-ins need openings ranging from 16 to 25 inches tall and 5-1/2 to 12 inches deep. Within about 3 inches per side, a trim kit or a framed-in filler fixes it. Bigger mismatches mean cutting one section of the wall, not all of it.
Bad advice spreads here because fire brands name units by flame width, retailers rarely publish rough openings, and most media wall builders frame the hole around one specific fire that later gets discontinued. Below are the beliefs that cost homeowners the most when that original fire dies.
"A 60-inch fire is a 60-inch fire"
If my old fire was 60 inches, any 60-inch replacement will slide into the same hole.
The "60" is a marketing width. We pulled the manufacturer spec sheets and manuals for three widely sold 60-inch built-ins and lined them up:
| Model (60-inch class) | Unit W x H x D | Framed opening the maker specifies | Wall it's designed for |
|---|---|---|---|
| Dimplex IgniteXL XLF60 | 60-1/4" x 15-1/2" x 5-7/8" | 60-5/8" W x 16" H | 2x6 (2x4 only with optional trim kit) |
| Touchstone Sideline Elite 80037 | 59-3/4" x 19-3/4" x 5-1/2" | Per dimensional drawing (sizes don't share framing) | 2x6 recessed |
| Amantii Panorama BI-60-DEEP | 58-5/8" x 23-5/8" x 12-5/8" | 60" W x 25" H x 12" D | Deep built-in chase |
All three are "60-inch," and all three are within 1-5/8 inches of each other on width. Height is where they split: an opening framed for the Dimplex is 9 inches too short for the Amantii and roughly 4 inches short for the Touchstone. Depth is the real wall-breaker. The Amantii wants a 12-inch cavity, more than double what a 2x6 stud wall gives you.
Rule of thumb: Width rarely kills a swap. Height and depth do. Check those two numbers first.
"Measure the glass and you're done"
Measure the visible flame window of the old fire and buy a new one with the same size.
The viewing area is the least useful number. The XLF60's flame window is 58-3/4 inches wide, but the unit body is 60-1/4 inches and the framed opening is 60-5/8 inches. Measuring the glass would put you nearly 2 inches off.
Pull the old fire out (power off at the breaker first) and record:
- Opening width and height, framing to framing, at three points each. Media wall openings are rarely square.
- Cavity depth from the face of the finished board to the back of the cavity, and note anything in it: the wall behind, a stud, cables.
- Finish thickness of the board, tile or slab around the hole. This decides whether a trim kit can reach.
- Sill depth. Dimplex requires the bottom sill under the XLF60 to be at least 3-1/2 inches deep.
- Power location: a plug-in outlet inside the cavity, or a hardwired junction box, and which side it's on.
- Sill height from the floor. Dimplex recommends mounting the unit's bottom 30 to 40 inches off the floor. Your TV height above depends on this.
For the depth side of the problem, see our guide on how deep a media wall should be.
"A trim kit will hide any gap"
If the new fire is smaller, buy a trim kit and the gap disappears.
Trim kits have hard limits. One US insert retailer's fit guide puts it this way: an opening 1 to 3 inches larger per side takes a standard trim. An opening 4 to 6 inches larger per side needs an extended trim, often ordered with the fire. Past about 6 inches per side, you need custom trim or new framing to narrow the opening.
Brand trims are also model-locked. Dimplex's XLFTRIM60 measures 62-3/4" x 18-1/4" x 1-7/8". It exists mainly so the XLF60 can sit in a 2x4 wall. Each trim is sized to one width, and one retailer lists the 50-inch kit as fitting "XLF50 & EVO50 Fireplaces only." A trim from your old fire almost never carries over to a different model. Amantii's supplied trim only works if your wall finish is 1 inch thick or less. A thick porcelain slab or stone-over-board finish can rule out the trim entirely.
Pro tip: Hold the trim's outer dimensions against your opening with painter's tape before you commit. If the tape line falls past the edge of your finish or onto a tile grout line, plan a filler instead.
"Same brand, same size means a drop-in swap"
I'm replacing my Dimplex with a newer Dimplex of the same width, so it will just fit.
Product lines change inside the same brand. One retailer lists the 74-inch IgniteXL Bold at about 12.1 inches deep and 23.9 inches tall. The standard IgniteXL is 5-7/8 inches deep and drops into a 2x6 cavity. Same badge, roughly double the depth. Treat any successor model as a new fire and check its manual for the framing drawing.
Best for: Homeowners whose fire is still under warranty. Ask the maker for the current equivalent and its framing drawing in writing before buying.
"If it stops working, the whole fire has to go"
A dead built-in fire means hunting for a whole new unit.
Check parts before you cut anything. Amantii's BI-DEEP manual lists the same circuit board part number across all five widths, from 40 to 88 inches. In a DIYnot thread, a UK owner whose one- or two-year-old fire stopped heating couldn't find an element for a model they thought was discontinued. The replies sent them to the retailer's customer service and buying office for manufacturer contacts, and told them to check the overheat reset and thermostat first. A repair that keeps the old unit in its hole is the cheapest fix there is.
Important: Amantii's manual says to always disconnect the power before any maintenance or relocation, and to use a certified electrician if new circuits or outlets are needed. If the fire is hardwired, disconnection and repair are an electrician's job.
"Making the hole bigger means rebuilding the wall"
If the new fire is taller or wider, the media wall has to come down.
Direct Fireplaces describes the real job: cut back the board, add timber or metal studs to support the new opening, and re-board. Only the section around the fire is touched. In a stud-framed wall, raising the opening means moving the header up, which takes space from the gap between fire and TV. Lowering the sill is often easier if the Dimplex 30-to-40-inch floor-height range still works. Widening past a stud means adding new king and jack studs on both sides.
Price range: GetMediaWall's pricing model puts a full 12–16 ft painted media wall with a 60-inch electric fireplace at $7,100–$10,400 nationally ($9,200–$13,600 in the Bay Area). The 60-inch fire alone is $2,500 of that estimate. Re-cutting one opening is a small share of a full build. Get it quoted as a modification, not a new wall.
Important: Enlarging upward shrinks the clearance between the fire's heat outlet and the TV. Re-check the new fire's required clearance to the TV and mantel in its manual. Our electric fire heat and ventilation rules cover why this matters.
"Making the hole smaller is just filler"
If the new fire is smaller, pack the gap with filler and paint over it.
Filler can only close small gaps. Anything larger needs framing: a new stud or noggin, then a board patch flush with the face. A plasterer on AVForums described the method for patching media wall board: glue or screw the patch slightly recessed, fill in thin layers, and sand lightly. The poster said their pre-painted patch became "literally invisible." Thick filler shrinks and shows, so plan a second coat.
Two cautions. First, what you add around a heater outlet must suit the clearances in the new fire's manual. One AVForums builder describes lining the fire area with 1/2-inch fireboard, doubled in places, for extra heat protection. Second, if the wall is fire-rated, National Gypsum notes that larger holes need the gypsum board replaced back to the framing, or the rating can be compromised.
When to DIY: Shrinking width by a few inches in a painted drywall wall, with a plug-in fire.
When NOT to DIY: Tile, slab or stone finishes, any change to a header, or any hardwired fire.
"The new fire can use the old outlet"
The old fire plugged into an outlet in the cavity, so the new one will too.
Check the new unit's power requirements. Amantii's BI-DEEP needs a grounded 15-amp, 120-volt circuit, ideally a dedicated one, and must be wired per the NEC. Touchstone lists a 15-amp circuit for its Sideline Elite. The plug or junction may sit on the opposite side from your old unit. Amantii's cord exits the left side and is 70-7/8 inches long. Relocating a receptacle inside the wall is electrical work, not trim carpentry. Our guide to in-wall outlet code for media walls covers what the NEC allows.
Important: Never run an extension cord or power strip inside the cavity to reach the new plug position. Amantii's manual warns against extension cords outright. Moving or adding a receptacle or hardwired connection in a finished wall is a job for a licensed electrician.
The takeaways
- Compare rough-opening height and cavity depth first. Width is usually within 2 inches across brands.
- Within roughly 3 inches per side, a matching trim kit works, if your finish is thin enough. Past 6 inches, frame the opening in.
- Taller or deeper fires mean re-cutting one section of the wall, not a rebuild, but every inch of height comes from your TV clearance.
- Try a repair first. Shared parts like control boards can keep the original fire in its hole.
- New fire, new power check: circuit, plug side, and an electrician for anything hardwired.
- Ask installers whether they cover modifications, not just new builds. Across the 1,009 installers listed on GetMediaWall, 125 list fireplace media wall work. Only 19 publish a price for it, with a median starting price of $189 (the companies' own claims). Only 84 of the 1,009 state any warranty on their websites, with a median of 12 months.
If the fit check says you need a new opening, you can compare local fireplace media wall installers, read about our fireplace media wall service, or answer a few questions to get free quotes. Still choosing the fire? Start with how to choose an electric fire for a media wall.
Sources
- Dimplex IgniteXL XLF60 product/spec sheet (PDF) — XLF60 unit, viewing and framing dimensions; 3-1/2" sill; 30–40" mounting height; XLFTRIM60 size; 120V/1,500W
- Amantii Panorama BI-DEEP installation manual (PDF) — BI-60-DEEP size and 60" x 25" x 12" rough opening; 1" max finish for trim; 15A/120V circuit; shared circuit board part; cord side and length
- Touchstone Sideline Elite series specs (Very Good Fireplaces) — 80037 dimensions; "sizes do not share framing"; 15-amp circuit
- Touchstone Sideline Elite 84" listing (Best Buy) — recessed design for 2x6 walls
- Dimplex XLF trim kit (Fireplaces Direct) — trims sold per width (50/60/74/100) for XLF fireplaces
- Dimplex XLF50 trim kit listing (Stylish Fireplaces) — "Fits Dimplex XLF50 & EVO50 Fireplaces only"
- Dimplex IgniteXL Bold 74" listing (The Torch Guys) — retailer-listed Bold dimensions of about 12.1" deep and 23.9" tall
- Will an electric fireplace insert fit my opening? (Electric Fireplaces Depot) — trim kit thresholds of 1–3", 4–6" and 6"+ per side
- Replacing a media wall fire: what are your options? (Direct Fireplaces) — cut, add studs and re-board to modify the aperture; isolate power; electrician for wiring upgrades
- Building another media wall (AVForums thread) — builder lining fire area with 12.5 mm fireboard, double-lined in places
- Patching holes in dot and dab wall (AVForums thread) — plasterer's patch method and the homeowner's result
- Electric fire no heat (DIYnot thread) — owner of a discontinued fire trying to source parts; reset and thermostat checks
- Fire-rated wall repair best practices (National Gypsum) — larger holes need board replaced back to framing