Quick Answer: The best electric fireplace trim kit depends on your wall, not just your fireplace’s width. For a fully flush 2x4-wall recess, Dimplex’s XLFTRIM74 Trim Accessory Kit ($270.99, per Dimplex’s own store) is the reference standard for the IgniteXL/Ignite Evolve line. For retrofitting an insert into an existing masonry or gas fireplace opening, Touchstone’s Trim Kit for Fireplug Pro (starting at $69.00, per Modern Blaze) covers irregular gaps around its 24–33” inserts. And for units that only partially sink into the wall, SimpliFire’s TRIM-ALL60 semi-recessed trim skirt ($117.00, down from $158.11, per Flame Authority) finishes the visible front edge instead of a flat seam. These aren’t interchangeable — pick based on how your specific unit was actually installed.
A trim kit looks like the most generic part of an electric fireplace setup — a plain metal frame, the kind of thing a buyer assumes any brand’s version will do. It isn’t. The three kits below solve three genuinely different installation problems, and mixing them up means a gap that never closes right.
Trim kits compared
| Kit | Best for | Fits | Price |
|---|---|---|---|
| Dimplex XLFTRIM74 | Full flush 2x4-wall recess | IgniteXL/Ignite Evolve 74" | $270.99 |
| Touchstone Fireplug Pro trim | Masonry/gas firebox retrofit | Fireplug Pro 24"/29"/33" | from $69.00 |
| SimpliFire TRIM-ALL60 | Semi-recessed (partial depth) | Allusion 60" recessed | $117.00 (list $158.11) |
1. Dimplex XLFTRIM74 — Best for a Full Flush Recess
Dimplex IgniteXL 74" Trim Accessory Kit (XLFTRIM74)
- $270.99 at both Home Depot and Dimplex's own store — the minimalist black metal trim that makes a fully flush 2x4-wall installation possible for the 74" IgniteXL and Ignite Evolve firebox.
- Closes the gap between the firebox and the finished wall surface with a clean, near-invisible edge, per Dimplex's product listing — this is the trim kit reused site-wide as the reference example any time our other guides mention a "2x4-wall install" (see our best 50-inch electric fireplace and Dimplex insert coverage).
- Sold separately by size — 50", 60", 74", and 100" versions exist for their matching IgniteXL/Ignite Evolve firebox widths, so confirm your exact model before ordering.
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This is the trim type most new-construction and full-remodel installs need — the firebox sits entirely inside the wall cavity with no visible depth, so the trim’s only job is closing a flat seam. See our best Dimplex electric fireplace roundup for the IgniteXL firebox itself.
2. Touchstone Trim Kit for Fireplug Pro — Best for a Masonry/Gas Retrofit
Touchstone Trim Kit for Fireplug Pro Electric Fireplaces
- Starting at $69.00 per Modern Blaze, available in 2-inch and 4-inch trim widths sized for the 24", 29", and 33" Fireplug Pro models — not compatible with other Touchstone lines like the Sideline series covered in our Touchstone roundup.
- The Fireplug Pro insert itself ($699, down from $1,049, per Touchstone's own listing) is built to convert an existing wood-burning or gas firebox to electric — a different job than a fresh-cut drywall opening, which is why its trim kit is sized to cover a wider, more irregular gap rather than a tight, flush seam.
- Same 1,500W/5,000 BTU/400 sq ft heater spec as every other indoor plug-in unit on this site — the trim kit changes what opening it can finish, not the heat output.
If you’re replacing a wood-burning or gas insert rather than building a new wall cutout, this is the category to shop — check our best electric fireplace insert guide for the retrofit use case more broadly.
3. SimpliFire TRIM-ALL60 — Best for a Semi-Recessed Install
SimpliFire TRIM-ALL60 Semi-Recessed Trim Skirt
- $117.00, down from a $158.11 list price — a 26% discount per Flame Authority's current listing — sized for SimpliFire's Allusion 60" recessed electric fireplace.
- Built for a "semi-recessed" install, per SimpliFire's own product description: the firebox only partially sinks into the wall and still projects forward a few inches, so the skirt covers that visible front edge instead of a flat wall-to-frame seam like the Dimplex kit above.
- Sized versions exist across the Allusion line (40", 48", 60" all confirmed available) — order the skirt that matches your specific Allusion width, not just the nearest size up.
Semi-recessed is a real third depth category, distinct from both the full-flush Dimplex kit and Touchstone’s retrofit trim — see our best SimpliFire electric fireplace roundup for the Allusion firebox lineup itself.
Why “just a metal frame” spans $69 to $271
A trim kit looks like the kind of accessory that should cost roughly the same everywhere — it’s not a heater, not a glass front, just a frame. In practice the price tracks the installation problem it solves, not its size: Touchstone’s Fireplug Pro trim starts at $69 because it’s covering a rough, pre-existing masonry gap where a little imprecision is expected; Dimplex’s $270.99 kit is engineered for a hairline-tight flush fit in new framing, which costs more to manufacture to that tolerance; SimpliFire’s skirt sits in between because a semi-recessed edge has to look finished from the front without needing the same flush precision as a fully sunk install. Buying the cheapest option for a job that needs the tight-tolerance kind — or vice versa — is the mistake this category actually invites.
The bottom line
Match the trim kit to how your wall opening was actually built, not just to your fireplace’s width. New construction or a full remodel with a fresh 2x4/2x6 cutout calls for a flush kit like Dimplex’s XLFTRIM74. Converting an existing wood or gas firebox calls for a retrofit-style kit like Touchstone’s Fireplug Pro trim. And a unit that only partially recesses needs a semi-recessed skirt like SimpliFire’s TRIM-ALL60. For the fireboxes these kits attach to, see our best electric fireplace insert, best Dimplex, and best SimpliFire guides, or our sizing guide for the clearance a recessed install needs before you cut into a wall.