Best Electric Fireplace Trim Kit? How to buy and install a Fireplace trim kit.

3 Best Electric Fireplace Trim Kits?

3 Best Electric Fireplace Trim Kits? This article discusses the three best electric fireplace trim kits and how to buy and install them.

You need not look far to understand the rationale behind the existence of trim kits, by simply looking at a built-in electric fireplace that has a hole of raw drywall at the edges. A box is just an electric fireplace insert. That box is made into a completed, seamless feature that appears to be part of the wall with a purpose with a trim kit.

Below, you will see the 3 best electric fireplace trim kits currently available in the market, how to measure and install an electric fireplace, and the most common mistakes that first-time buyers make.

Important point to note: A trim kit is not a decorative element you can afford to give up on, at least with most flush or recessed electric fireplace models, it is the only thing that prevents a professional finish and a glaring electrical construction opening.

What Is an Electric Fireplace Trim Kit?

Electric fireplace trim kit: A collection of metal or composite panels that enclose the periphery of an integrated or built-in electric fireplace insert, which bridges the space between the firebox and the material of the wall it is embedded in. Kits usually have a top piece, two side pieces, and occasionally a bottom piece, most of which are sold in flat black or matte finishes so that they do not appear visually on drywall, tile, or stone.

Trim kits are different from mantels. Mantel A decorative shelf-and-surround construction, typically of wood or stone, which surrounds and extends over a fireplace. A trim kit is more minimal and is designed to fill the installation gap around a recessed unit, and it is first made to function and then secondly to look good.

Do You Actually Need One?

Not all installations require a trim kit. This is a speedy gut check.

When constructing a wall around an electric fireplace, and a linear or built-in insert, plan to spend some money on a trim kit at the outset. It is much easier to prepare the rough opening based on a known size of a trim kit than to add it later.

Quick Answer: Our Top 3 Picks

Note: Prices represent a typical market price range of name-brand trim kits as of 2026 and will change depending on the fireplace width and retailer. Price always needs to be checked with the retailer before buying.

The 3 Best Electric Fireplace Trim Kits

1. Dimplex Ignite XL Series Trim Kit — Best Overall

Dimplex trim kits are specifically designed to fit its IgniteXL and Ignite Quest linear fireplace lines, and are the most popular trim kits in the inventory of most fireplace retailers, which says something about how often they are used by their installers. They incorporate a minimalist black metal design that is designed to fade into the wall instead of making a statement and the pieces are designed to fit a 2×4 wall construction with no additional framing tricks.

What we like:

• Each fireplace width (50, 60, 74 and others) is sized to purpose, meaning there is no guessing.
• Profile is slim, which leaves minuscule visual footprint.
• Broadly distributed with good components and support.

Trade-offs:

• Fits only Dimplex-brand fireboxes – not universal.
• High price relative to generic trim.
• Wider sizes (60+ and above) are more expensive.

Ideal use case: Homeowners owning or purchasing a Dimplex Ignite XL/Ignite linear fireplace wish to have a guaranteed factory fit.

2. Universal 3-Piece Adjustable Trim Kit — Best Budget Pick

A number of manufacturers, such as smaller aftermarket brands, offer adjustable 3-piece trim kits that are intended to fit various models of firebox, instead of a single one. They are usually telescoping or overlapping side pieces to enable you to make the fit just right upon installation, making them a convenient choice when the proper trim of your fireplace is out of stock, or when it is back-ordered.

What we like:

• Reduced cost, typically less than 200.
• Design is adjustable and tolerates small measurement errors.
• Supports a variety of firebox brands.

Trade-offs:

• Fit is not as accurate or smooth as a brand-matching kit.
• The quality of the materials differs more between manufacturers.
• Trimming to size, some assembly needed.

Best: DIYers with limited budget or those who have completed an older/discontinued model of the fireplace and the original trim kit is no longer available.

3. Napoleon/Modern Flames Deep-Fit Trim Kit — Best for Deep Recessed Installs

To fit fireplaces that are further recessed into a wall, like replacements of an old masonry firebox or behind additional layers of tile or stone, a deep-fit trim kit provides the additional depth to clean up to the wall surface. Such kits are constructed with longer flanges than the usual trim, a consideration when you do not have a plain drywall surface on your wall.

What we like:

• Additional depth carries heavier wall constructions.
• Excellent suitability with stone, brick or masonry conversions.
• Heavy, high-grade metal in the majority.

Trade-offs:

• More cumbersome and difficult to install.
• Have fewer size options than mainstream Dimplex trim.
• Generally needs a more accurate pre-installation measurement.

Best use: Homeowners who are opening a wood burning or masonry fireplace opening and are installing an electric insert where the wall depth is more than a typical stud wall.

How to Choose the Right Trim Kit?

Consider this decision model prior to purchase.

1. First match the brand. Assuming your fireplace insert does have a manufacturer-specific trim kit, go there. The trim is designed to fit that firebox and will be much more fitting than any of the universal options.
2. Test your wall depth. Typical trim kits are based on 2×4 (approximately 3.5) wall construction. When your wall is thicker (additional layers of drywall, tile, stone veneer) then you will require a deep-fit or extended trim kit.
3. Select finish and color. Majority of the trim kits are in flat black or brushed metal. When your fireplace surround has a different finish, you might wish to paint or wrap the trim to match, but many installers leave it black because it does not appear as a decoration, but as a shadow line.
4. Check return policy prior to purchase, trim kits are bulky, fragile at times, and costly to ship. Since they can be difficult to return once assembled or out of packaging, verify fit specifications with your rough opening, before you place an order.

Comparison at a Glance

How to Measure Your Fireplace for a Trim Kit?

The most frequent cause of trim kits being returned or not fitting is getting the measurement erroneous. Follow this sequence:

1. Measure the firebox width and height! measure it exactly as the instructions in the installation manual of your fireplace say it should be, and not as it appears to your eye.
2. Measure your wall aperture or rough-in framing and measure its width and height, including any tile/stone thickness that will overlay the drywall.
3. Confirm the listed “fits” specifications of the trim kit, which are typically provided in either a list of compatible models or a range of widths, rather than a precise size.
4. Take into consideration the wall depth, as it will dictate whether you should use standard or deep-fit trim.
5. Whenever possible, use an order from the manufacturer, not a generic size chart, on the fit chart.

How to Measure Your Fireplace for a Trim Kit?

The majority of trim kits are intended to be installed by DIY, although it is much simpler with a second person.

1. Install the trim on top of the fireplace not on top of the firebox.
2. Put the trim pieces together – depending on the kit and instructions included, most are simply screwed together, top, sides and occasionally bottom panels.
3. Install the trim around the firebox opening before completing the wall, to determine any sizing problems before they are difficult to correct.
4. Complete wall surface (drywall, tile etc.) to the point where the trim will be installed.
5. Attach the trim kit to the mounting points of the framing or firebox as indicated by the manufacturer.
6. Seal or caulk the trim edge, as manufacturer suggests, to give a cleaner finished edge.
7. Test fireplace operation once trim has been installed to ensure that nothing is blocking vents or controls.

Mistake to watch out of fitting the trim kit prior to the completion of the wall material. Majority of kits are designed to be installed over an already finished wall surface, not to replace the drywall or tile behind.

Trim Kit vs. Mantel vs. Media Console: What’s the Difference?

The three choices can address the same basic issue of completing the look around a fireplace in various forms.

When the fireplace is being permanently enclosed into a wall, a trim kit is usually the correct choice. A mantel package would be appropriate to homeowners who desire a more traditional and decorative appearance and feel no issues about the additional volume. A media console is the one that would be the best when you simply cannot alter the wall in any way, e.g. in a rental.

Common Mistakes to Avoid

• Purchasing the universal trim that is not checked by the wall depth. All universal kits do not necessarily support thicker walls.
• Placing an order of the trim without establishing the exact model number of the fireplace. Fireplaces may have similar appearances, but not the same trim specifications.
• Omitting the dry-fit step. It is a major rework at the end of the day to have to fit the trim in before the wall is built up.
• The assumption is that trim kits are cross brandable. The trim kit of Dimplex will not fit a Napoleon firebox, even at the same width.
• Not observing the finish gap around vents or switches. There are also some trim kits that have control cutouts that are needed, and failing to plan this results in delays in the installation.

Cost Breakdown

These are approximate market ranges which are used as a guide to planning, not a quote. Before buying, always check the current price with the retailer or manufacturer.

You May Also Read:

• Can You Paint an Electric Fireplace?
• Electric Fireplace Breaker Requirements? 7 Essential Safety Rules

FAQs:

My Final Thought:

A brand-compatible kit such as the Dimplex IgniteXL trim is the safest and best-fitting option to a new wall around a linear electric fireplace, to most homeowners. When the budget is the primary factor or your specific model is not available in the trim you want, a universal adjustable trim kit will do it with a bit more patience in installing. And in the event that you are converting an old masonry fireplace or that you are working with a thicker wall a deep-fit trim kit is constructed just to fit that purpose.