Do You Need a Trim Kit for an Electric Fireplace Insert?

On this page (9 sections)

1. When do you need a trim kit for an electric fireplace insert?
2. What should you measure before choosing a trim kit?
3. What does an insert trim kit do?
4. Can you use an insert without a trim kit?
5. Which insert may suit a smaller opening?
6. Does a trim kit affect installation?
7. What should you check before you buy?
8. How do you choose an electric fireplace insert trim kit?
9. Which insert trim option should you pick?

An electric fireplace insert trim kit can cover gaps around the opening, but the insert body still needs to fit. Compare the body and trim dimensions with your firebox opening before choosing a unit.

A trim kit usually frames the front of an insert. Some models include one, while others may fit an opening without extra trim.

Start with measurements and the installation instructions before choosing based on appearance.

When do you need a trim kit for an electric fireplace insert?

You need trim when the insert’s front leaves a gap that its included trim is meant to cover. If the insert fits the opening as intended and the front looks finished, extra trim may not be necessary.

Measure the opening’s width and height at the front, then check its depth at several points. Openings can vary from top to bottom or side to side, especially in older fireplaces.

Compare those measurements with both the insert body and its overall dimensions with trim. The body needs to fit inside the opening; the trim needs to overlap the edge enough to frame it.

A trim kit is a finishing piece, not a substitute for measuring. It won’t make an insert fit if the body is wider or taller than the available opening.

What should you measure before choosing a trim kit?

Measure the firebox opening and the insert with trim and without trim. These figures answer different questions: whether the unit fits inside and whether its frame covers the opening’s edges.

Measure width and height in more than one place. Use the smallest opening measurements when checking whether the insert body can slide in.

Measure depth from the front edge to the back of the usable space. Check for obstructions such as a raised hearth, an uneven back wall, or a power outlet that could interfere with placement.

Our guide to measuring electric fireplace insert sizes explains how to check the firebox before you buy. If the opening is shallow, also compare it with the installation requirements for the specific insert.

How do insert dimensions differ from trim dimensions?

Insert dimensions describe the unit body, while overall dimensions may include the trim. Use the body size to check whether it fits inside the opening and the overall size to see how much front area the trim covers.

For example, the LegendFlame Jaden body measures 31 in wide by 24 in high by 6 in deep. With its trim kit, it measures 36 7/32 in wide by 26 31/32 in high by 6 in deep.

The Jaden trim kit includes 1 top piece and 2 side pieces. Measure the firebox before choosing it, since its trim dimensions do not mean the insert body fits every opening.

What does an insert trim kit do?

An insert trim kit frames the front and can cover the gap between the unit and the opening. It gives the installation a defined edge when the opening is wider or taller than the insert body.

The trim does not change the insert’s body size or the firebox’s depth. It also does not mean the opening meets the unit’s installation requirements.

Some inserts come with trim included. The PuraFlame Western 33 Inch With Trim Kit has a clean glass-front trim design and overall dimensions of 44.1 in wide by 31.5 in high by 8.8 in deep.

The Western’s stated maximum compatible size is 33 in, while its overall width is 44.1 in. Check the manufacturer’s installation instructions and the opening measurements rather than assuming the size label describes the full outer width.

Can you use an insert without a trim kit?

You can use an insert without extra trim if the unit is designed to fit that way and the installation instructions allow it. A close fit may leave little or no gap to cover.

The LegendFlame Jaden offers dimensions both with and without its included trim kit. Its body is 31 in wide by 24 in high, while the complete unit with trim measures 36 7/32 in wide by 26 31/32 in high.

Don't remove or modify included trim unless the manufacturer’s instructions permit it. A changed installation can affect how the unit sits in the opening.

If the front has a gap, check whether the included trim covers it before looking for a separate frame. Ask the manufacturer about approved options when the opening or fit falls outside the instructions.

Which insert may suit a smaller opening?

The Efiretric Adam has a smaller body than the other inserts here, but its overall trim dimensions still need to fit the fireplace front. Compare its body and outer dimensions separately.

The Adam insert measures 23.46 in wide by 17.64 in high by 5.12 in deep. With front trim, it measures 28.34 in wide by 20.08 in high by 5.17 in deep.

The difference between those widths is the front trim extending beyond the body. Measure the opening carefully to confirm that the body fits and that the trim sits over the front edge as intended.

For a different size range, compare the best 23 inch electric fireplace inserts for cabinets. Check each unit’s body dimensions and trim dimensions against your own opening.

Does a trim kit affect installation?

Yes, the trim affects the front dimensions and how the insert sits against the opening. Follow the unit’s instructions for fitting the trim, placing the insert, and meeting any clearance requirements.

The LegendFlame Jaden’s installation instructions describe fixing the trim kit and sliding the insert into the opening. Its 6 in depth gives you a specific figure to compare with the usable space, but your opening and installation conditions still matter.

The PuraFlame Western has a flat bottom and can sit directly on the floor. It plugs into a 120V outlet and cannot be hardwired, so consider outlet access when planning its position.

Keep the power cord clear of sharp edges and pinch points. If you’re replacing a wood-burning insert or working with an existing fireplace, check the manufacturer’s installation guidance and local requirements first.

For a broader look at placement choices, see electric fireplaces for the wall, recessed spaces, and existing openings. A wall-mounted or recessed unit has different fit questions from an insert with a front trim kit.

What should you check before you buy?

Confirm the body fits, the trim covers the front as intended, and the installation instructions suit your opening. These checks matter more than the width in a product name.

Use this quick checklist:

1. Measure the opening width and height at the front and back.
2. Measure depth at several points and note any obstructions.
3. Compare the insert body dimensions with the smallest opening measurements.
4. Compare the full trim dimensions with the front of the fireplace.
5. Read the installation instructions for fit, placement, and clearance requirements.
6. Confirm the outlet and power cord can reach without being trapped.

For the Western, note that the overall width is 44.1 in even though its name includes “33 Inch.” For the Jaden and Adam, compare the body and overall dimensions separately.

If you’re comparing inserts with wall-mounted options, electric fireplace inserts versus wall mounts can help you decide which installation style fits your room and plans.

How do you choose an electric fireplace insert trim kit?

Choose an insert with included trim when its frame matches the look and coverage you need. Choose a unit without extra trim only when its instructions allow the fit and the front sits neatly in your opening.

The Western includes trim and has the widest overall dimensions here. The Jaden gives separate body and trim measurements, while the Adam has the smallest insert body of these 3 options.

Measure first, then compare the exact body and overall dimensions. If your opening is uneven or the instructions don’t clearly cover your setup, ask the manufacturer before installing.

For other insert styles, browse the electric fireplace insert guide or compare electric fireplace inserts with log sets.

Which insert trim option should you pick?

If you want trim included with a larger unit, compare the PuraFlame Western’s overall dimensions with your opening. If you want separate body and trim measurements, the LegendFlame Jaden makes those comparisons straightforward; for a smaller insert body, check the Efiretric Adam.

The right choice depends on measured fit, front coverage, and the manufacturer’s installation instructions. Once you know your opening size, use electric fireplace insert sizes to narrow your options.

Frequently asked questions

Do all electric fireplace inserts need a trim kit?

No. An insert may fit the opening closely without one, or it may include trim to cover the gap around the unit.

Compare the insert dimensions and trim dimensions with your firebox opening, and follow the manufacturer’s installation instructions to confirm the intended fit.

What does a trim kit do on an electric fireplace insert?

A trim kit covers the edge around the insert where it meets the fireplace opening. It can give the front a finished border and cover a gap, but it does not make an insert fit an opening that is too small or confirm that the unit can be installed there.

How do I measure for an insert trim kit?

Measure the opening’s width and height at the front, then measure its depth at several points. Compare those measurements with the insert body and the trim’s overall dimensions.

Check the installation instructions for required clearances and any opening limits before buying.

Can I add trim to an electric insert that does not include it?

Only use trim that the manufacturer approves for that insert. A separate frame may not attach correctly or leave the clearances the unit requires.

Check the product instructions or contact the manufacturer if the insert’s trim options and opening measurements are unclear.