Inset Electric Fires: A Simple Guide for Fireplace Openings

If you already have a fireplace opening, chimney breast or old hearth, an inset electric fire can be one of the easiest ways to bring the room back to life.

You get the look of a real fireplace feature, but without the ash, fuel, chimney cleaning or gas work.

That is why inset electric fires are so popular for living rooms, snugs, bedrooms and homes where people want to keep the fireplace area but make it cleaner, easier and more modern.

The key is choosing the right fire for the opening.

A fire that fits well can look like it was always meant to be there. A fire that is the wrong size can look awkward very quickly.

So before ordering, it is worth checking the basics.

Quick answer

An inset electric fire is designed to sit into a fireplace opening, wall recess, chimney breast or prepared cavity.

It gives you a clean built-in fireplace look without needing a chimney, flue or gas supply.

Inset electric fires are a good choice for replacing an old fireplace, upgrading a hearth area, modernising a chimney breast, or creating a neater focal point in a room where a full media wall is not the plan.

Before ordering, always check the opening width, height, depth, power access, clearances and the finished look you want.

The easiest way to think about an inset electric fire is this:

It is for customers who want the fire to feel built into the room, rather than hanging on the wall.

If you already have a fireplace opening, the goal is usually to make the space look finished again.

You might be removing an old gas fire, an unused solid fuel fire, an outdated electric fire, or just refreshing a fireplace that no longer suits the room.

An inset electric fire lets you keep the fireplace focal point but make it much easier to live with.

What is an inset electric fire?

An inset electric fire is an electric fire designed to be recessed into an opening.

That opening could be:

• An existing fireplace opening

• A chimney breast recess

• A prepared stud wall cavity

• A false chimney breast

• A fireplace surround

• A hearth-style opening

The front of the fire remains visible, while the body of the appliance sits into the opening behind it.

This gives a neater, more built-in look than a fire simply placed in front of the wall.

Do inset electric fires need a chimney?

No. Inset electric fires do not need a working chimney, flue or gas supply.

That is one of the main reasons they are so practical.

If you have an old fireplace opening but no longer want to use gas, coal, wood or solid fuel, electric can be a much simpler route.

You still need to check the installation requirements, power access, airflow and dimensions, but you do not need the fire to vent smoke or fumes up a chimney.

That makes inset electric fires a good option for many modern upgrades.

Are inset electric fires good for old fireplace openings?

Yes, they can be ideal.

Many homes have fireplace openings that are no longer used properly.

The room may still be built around the chimney breast, but the old fire might be dated, inefficient, disconnected or simply not your style anymore.

An inset electric fire can help you keep the natural focal point of the room while making it cleaner and easier to use.

It can work well if you want to:

• Replace an old fireplace

• Update a chimney breast

• Keep the hearth area

• Make a snug feel cosier

• Avoid gas or solid fuel

• Create a simpler everyday fire feature

The main thing is to measure the opening properly before choosing the fire.

What should you measure before ordering?

This is the part you do not want to guess.

Before ordering an inset electric fire, measure the opening carefully.

Check:

• Opening width

• Opening height

• Opening depth

• Surround width

• Hearth depth, if there is one

• Distance to nearby shelves or cabinets

• Position of the power supply

• Any uneven stone, brick or plaster edges

• Whether the opening is square and level

• Whether there is enough room for the fire body

Do not rely only on the old fire size.

Old fireplaces are often uneven, and previous installers may have adjusted the opening over time.

It is always better to measure the actual space you have now.

Check the depth carefully

Depth is one of the most important details for inset fires.

A fire might fit the width and height, but still not have enough space behind it.

Before ordering, check the required recess depth for the model you are considering.

If the opening is shallow, you may need:

• A slimmer inset fire

• A spacer frame

• A different model

• A small amount of building work

• A wall-mounted or semi-inset alternative

If the opening has plenty of depth, you may have more options.

This is where photos and measurements really help. If you send us the opening size and a picture of the fireplace, we can usually narrow down the best route quickly.

What about power access?

Inset electric fires need safe power access.

Before ordering, check where the socket or fused spur will be.

You should avoid trapping plugs, stretching cables or hiding unsafe connections inside a closed fireplace opening.

Ask yourself:

• Is there a socket nearby?

• Will the plug or spur remain accessible?

• Does the cable reach safely?

• Will the cable be hidden neatly?

• Is electrical work needed before installation?

• Should a qualified electrician be involved?

For a clean finish, many customers ask an electrician to prepare the power point before the fire is installed.

Can you put an electric fire into an old chimney breast?

Yes, in many cases you can.

An old chimney breast can be a great location for an inset electric fire.

Because the electric fire does not need a live chimney or flue, the installation is usually much simpler than gas or solid fuel.

However, you still need to check the condition and shape of the opening.

Before using an old chimney breast, check:

• The opening size

• The available depth

• Whether the chimney is damp

• Whether loose debris needs clearing

• Whether the surface is suitable

• Whether the opening needs lining or finishing

• Whether there is safe power access

• Whether the fire can be installed level

If the opening is damp or damaged, fix that first. Do not install an electric fire into a wet, unstable or crumbling opening.

Can an inset electric fire be used without heat?

Yes, many electric fires allow the flame effect to run without turning on the heater.

This is a big everyday advantage.

You can enjoy the look and glow of the fire even when the room is already warm.

As a guide, many Lumo electric fires cost approximately 1c–3c per hour on flame-only mode, depending on the model and your electricity rate.

That makes flame-only mode excellent value for evening atmosphere, relaxed TV nights and everyday cosiness.

Running costs are estimates only and will vary depending on your electricity tariff, model, settings and usage.

Do inset electric fires give heat?

Yes, many inset electric fires include a heater.

The heater is usually designed for local room warmth, not as the main heating system for the whole home.

The best way to think about it is:

• Use the flame effect for atmosphere

• Use the heater when the room needs a warmth boost

• Use your main heating system for whole-home heating

That gives you the fireplace feeling without relying on the electric fire to heat every room in the house.

Are inset electric fires easy to maintain?

Yes, they are generally very easy to live with.

There is no ash, no logs to store, no coal dust and no chimney sweeping in the same way you would have with solid fuel.

You still need to look after the fire properly.

Basic maintenance usually means:

• Keep vents clear

• Clean glass carefully

• Follow the product manual

• Keep the area dry

• Do not block heater airflow

• Check power access remains safe

Compared with gas or solid fuel, electric is usually much lower maintenance.

Inset electric fire or media wall fire?

This depends on the room.

Choose an inset electric fire if you already have a fireplace opening or want to keep a more classic fireplace layout.

Choose a media wall fire if you are building a new TV feature wall or false chimney breast from scratch.

An inset fire usually feels more traditional or room-led.

A media wall fire usually feels more architectural and design-led.

Both can look excellent. The right choice depends on the room you are working with.

Choose an inset electric fire if:

• You have an existing fireplace opening

• You want to keep the hearth area

• You are upgrading an old chimney breast

• You do not want a full media wall

• You want a simpler fireplace focal point

• You prefer a more classic room layout

Choose a media wall fire if:

• You are building a new TV wall

• You want a wider built-in fire

• You want shelving or cabinetry around the fire

• You want a more modern feature wall

• You are starting from a blank wall

• You want a one, two or three-sided installation

Best Lumo inset electric fires

The best Lumo option depends on whether you are working with a true fireplace opening, a wall recess, or a feature wall.

Here is the simple showroom breakdown.

Lumo Loft Series

The Lumo Loft Series is the strongest Lumo option for customers who want an inset fireplace look.

It is designed for rooms where you want the fire to feel like a proper fireplace feature without using gas, solid fuel or an open fire.

It works especially well in living rooms, snugs and fireplace openings where you want a cleaner, more modern electric upgrade.

Good for:

• Fireplace openings

• Hearth upgrades

• Snugs

• Living rooms

• Replacing an old fire

• Homes where a media wall is not the plan

• Customers who want a more classic fireplace feel

Choose Loft if you want a proper inset-style electric fireplace feature.

Lumo Aura Series

The Lumo Aura Series is a good option if you want a simple electric fire feature and easy installation.

It may suit customers who do not have the right depth for a traditional inset fire, or who want a cleaner wall-mounted style instead.

Good for:

• Simple living room upgrades

• Bedrooms

• Apartments

• Playrooms

• Wall-mounted layouts

• Easy fireplace features

Choose Aura if you want an easier electric fire upgrade without major building work.

Lumo Vision Series

The Lumo Vision Series works well for clean wall-mounted or recessed installations.

It can be a good alternative if your old fireplace opening is not suitable for a deeper inset-style fire, but you still want a neat modern feature.

Good for:

• Recessed layouts

• Feature walls

• Wall-mounted installations

• Modern rooms

• Homes without a usable fireplace opening

Choose Vision if you want a clean modern look with flexible installation.

Lumo Comfort Series

The Lumo Comfort Series is a practical option for slimline feature walls, chimney breast builds and wall-mounted installations.

It can suit customers who want a neater wall feature rather than a traditional fireplace opening.

Good for:

• Slimline feature walls

• TV walls

• Chimney breast builds

• Living rooms

• Everyday use

Choose Comfort if your project is moving more towards a slimline feature wall than a classic inset fireplace.

What if my fireplace opening is too small?

If the opening is too small, do not force the wrong fire into it.

You may have a few options:

• Choose a smaller inset fire

• Open the fireplace up slightly

• Use a different Lumo range

• Create a new recess

• Build a small feature wall

• Choose a wall-mounted fire instead

The right route depends on the room and how much work you want to do.

This is where sending photos is very useful. A quick look at the fireplace opening usually tells us what options are realistic.

What if the opening is too large?

If the opening is too large, you may need to reduce or finish the space around the fire.

Options may include:

• Building out the sides

• Adding a surround

• Creating a new internal frame

• Using a larger fire

• Finishing the opening with plasterboard, stone or panel work

• Choosing a different style of electric fire

A large opening is usually easier to work with than one that is too small, but it still needs to be planned properly so the fire looks intentional.

Common mistakes to avoid

Here are the mistakes we see most often with fireplace openings:

• Measuring only the old fire instead of the actual opening

• Forgetting to check depth

• Not planning power access

• Assuming every electric fire fits every fireplace

• Installing into a damp or damaged opening

• Choosing a fire that looks too small for the surround

• Blocking airflow

• Forgetting future access for cleaning or servicing

• Choosing by inch size instead of actual dimensions

Most issues can be avoided by checking the opening properly before ordering.

What to send us before ordering

If you are not sure which inset electric fire will suit your fireplace, send us:

• Opening width

• Opening height

• Opening depth

• A photo of the fireplace

• A photo of the full wall

• Whether there is a socket nearby

• Whether you want to keep the hearth

• Whether you want a modern or traditional look

• Any inspiration images you like

With that information, we can usually point you in the right direction quickly.

Final advice

An inset electric fire is a great option if you want to upgrade a fireplace opening without going back to gas, coal, wood or an open fire.

It gives you a cleaner, simpler and more flexible fireplace feature.

The main thing is to measure carefully before ordering.

Check the width, height, depth, power access and condition of the opening. Then choose the fire that suits the room, not just the one that looks nice in a photo.

If you are unsure, send us your fireplace measurements and a few photos. We can help you choose the right Lumo fire before you order.

FAQs

What is an inset electric fire?

An inset electric fire is an electric fire designed to sit into a fireplace opening, wall recess, chimney breast or prepared cavity, giving a clean built-in fireplace look.

Do inset electric fires need a chimney?

No. Inset electric fires do not need a working chimney, flue or gas supply. They still need safe power access, airflow and correct installation.

Can I put an electric fire in an old fireplace opening?

Yes, in many cases you can. You need to check the opening width, height, depth, condition, dampness, power access and installation requirements before ordering.

What should I measure before buying an inset electric fire?

Measure the opening width, height and depth. Also check the surrounding wall, hearth, power access and whether the opening is square and level.

Can an inset electric fire be used without heat?

Many electric fires allow flame-only mode without heat. As a guide, many Lumo electric fires cost approximately 1c–3c per hour on flame-only mode, depending on the model and your electricity rate.

Do inset electric fires give heat?

Yes, many inset electric fires include a heater for local room warmth. They are best used for comfort and atmosphere rather than whole-house heating.

Are inset electric fires easy to maintain?

Yes. They are generally low maintenance compared with gas or solid fuel fires. Keep vents clear, clean the glass carefully and follow the product manual.

Which Lumo fire is best for a fireplace opening?

The Lumo Loft Series is the strongest option for fireplace openings and inset-style upgrades. Aura, Vision and Comfort may suit some rooms depending on the wall, depth and installation style.

What if my fireplace opening is too shallow?

If the opening is too shallow, you may need a slimmer fire, a different installation method, a spacer frame, minor building work or a wall-mounted alternative.

Should I order the fire before altering the fireplace opening?

Yes. It is usually better to choose the fire first, then alter or finish the opening around the exact product dimensions and installation requirements.