How to Choose the Right Fireplace Dimensions for Your Home

Last Updated on January 30, 2023 by Kimberly Crawford

When it comes to choosing the right fireplace dimensions for your home, there are a few factors you need to take into consideration. The size of your room, the type of fireplace you want, and your own personal preferences all play a role in what size fireplace is best for you.

In this blog post, we will discuss the different things you need to think about when choosing fireplace dimensions and offer some tips to help make the process easier!

Standard fireplace dimensions.

Fireplaces come in a variety of sizes and shapes, from large, grand fireplaces to smaller, more compact ones. The standard dimensions for fireplaces vary depending on the type and size of fireplace you are looking for.

Freestanding Fireplaces have an average width of 36-40 inches and a height range between 34 and 42 inches. These fireplaces are generally placed against a wall or in the corner of a room, and sit on a hearth made from either brick or stone.

Fireplace Inserts measure an average width of 38-42 inches and height between 22 and 30 inches. They are designed to fit into existing masonry fireplaces, and provide added efficiency, style, and warmth.

Log Burners are smaller than the other types of fireplaces, with a width between 22 and 32 inches and height between 18 and 24 inches. They can fit into many existing spaces as well as most hearths without any additional remodeling.


The width of your fireplace should be determined by the space it is going in, as well as the type of fire you will be using. Freestanding fireplaces generally range between 36-40 inches wide, while inserts range from 38-42 inches and log burners measure 22-32 inches wide.


Fireplace height is determined by the type of fireplace you are installing and the size of the room. Freestanding fireplaces generally range from 34-42 inches in height, inserts measure 22-30 inches high, and log burners average 18-24 inches tall.


The depth of your fireplace should match with the width to ensure a balanced look. Freestanding fireplaces typically measure 15-20 inches deep, inserts range between 15-25 inches, and log burners can be anywhere from 8-15 inches in depth.

Gas fireplace dimensions.

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When installing a gas fireplace, it is important to consider the dimensions of the unit – width, depth and height. Standard gas fireplaces vary in size from 18” to 42” wide, 14”-20” deep and 21”-45” high.

These measurements do not include the space needed for venting or clearance. If your fireplace is to be recessed into a wall, you will need to ensure that the space available is large enough to accommodate the gas fireplace and its venting system.

You may also need additional clearance for combustible materials if the unit is located near walls or furniture.

Lastly, when selecting a gas fireplace, take into account all the necessary accessories that will be needed during installation, such as a flexible gas line or an adapter kit.

Electric fireplace dimensions.

Electric fireplaces come in a range of sizes and can be built into the wall or placed in any room. You can find electric fireplaces that are as small as 18 inches wide and 28 inches high, to those up to 70 inches long and 45 inches tall.

The size you choose will depend on your space requirements and heating needs. If the electric fireplace is going to be a primary source of heat, then you’ll want to opt for a larger model that can produce enough BTUs to adequately heat the room.

On the other hand, if it’s just for aesthetic purposes or supplemental heating, then you may be able to get away with a smaller model.

Masonry fireplace dimensions.

Masonry fireplaces are composed of brick, stone, or concrete. They are larger and heavier in comparison to prefabricated fireplaces and require a larger opening for installation.

Masonry fireplace dimensions typically range from 36 to 48 inches wide and between 28 to 40 inches high.

The depth of the fireplace is usually 13 to 16 inches at its deepest point. When constructing a fireplace, it is important to consider the size and shape of the chimney flue. The opening between the flue and fireplace should typically be between three to five inches.

Outdoor fireplace dimensions.

When building an outdoor fireplace, consider the various dimensions you’ll need to consider. The foundation should be at least 12 inches deep and 36 inches wide.

The firebox should measure no less than 20 inches deep and 24–30 inches wide.

The chimney needs to have a minimum height of 10 feet with an appropriate flue size for proper ventilation.

Corner fireplace dimensions.

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Corner fireplaces are a great way to maximize living space in any room. The right corner fireplace can provide warmth and atmosphere while bringing an air of elegance to the home. But before you purchase a corner fireplace, it’s important to make sure that you know the correct dimensions for your space.

The size of a corner fireplace depends on the space available in the room. Generally, corner fireplaces should measure at least 36 inches wide and 18 inches deep.

Brick fireplace dimensions.

Fireplaces come in a variety of sizes and shapes, but most brick fireplaces will have an average width of 40 to 48 inches and a height that ranges from 24 to 36 inches. The depth should also be taken into account when measuring the fireplace; it typically runs between 14 and 18 inches.

When installing a brick fireplace, it’s important to consider the appropriate clearances for combustible materials.

For a standard brick fireplace, you should have an 18-inch clearance from any combustible material to ensure safety and optimal efficiency.

Additionally, before installing your brick fireplace, be sure to check with local building codes to ensure that the size and height of your installation is compliant with regulations.

Wood-burning fireplace dimensions.

When it comes to installing a wood-burning fireplace, the size of the unit is an important factor. The size of your fireplace will depend on the amount of space you have available in your home and also on how much heat output you want.

Generally speaking, fireplaces come in three main sizes: small, medium and large. Small fireplaces are typically 28 to 36 inches in width and 24 to 30 inches in height.

Medium fireplaces measure 40 to 48 inches wide by 32 to 38 inches tall, while large fireplaces are typically 60+ inches wide and 40+ inches tall.

Double sided fireplace dimensions.

When considering a double sided fireplace, you will want to consider the overall size. These typically measure between five and six feet in width and height, providing ample space for two individuals to enjoy a cozy fire. However, this size can vary depending on the specific model of fireplace that you choose.

Additionally, keep in mind that some models may require extra clearance behind, in front of the fireplace, or on either side to allow for proper installation.

Be sure to check your measurements carefully and consult a professional if needed to ensure your double sided fireplace will fit properly into your home.

The depth of a double sided fireplace tends to be much larger than traditional fireplaces, measuring between 30-36 inches deep.

This will vary depending on the specific model and features selected, such as a raised hearth or additional shelving. Again, be sure to measure carefully and consult a professional if needed for proper installation.

Modern fireplace dimensions.

If you’re looking to upgrade your living space with a modern fireplace, there are various sizes and shapes to consider. Generally, the smallest fireplaces measure about 36 inches wide and 32 inches tall.

The largest models can reach up to 60 inches in width and 50 inches in height. However, keep in mind that the size of your fireplace needs to match the size of the room it’s in, so measure your space carefully before deciding on a particular size.

Additionally, you should also factor in the depth and width of the mantel or hearth to ensure that the fireplace has enough clearance from any nearby walls or furniture.

Linear fireplace dimensions.

Linear fireplaces are some of the most efficient, offering a contemporary aesthetic and superior heating capabilities. When it comes to the size of linear fireplaces, the width varies depending on your style preference and budget.

On average, linear fireplaces range between 24-72 inches wide. The height also varies from model to model but can typically be around 20-30 inches.

The depth of linear fireplaces is usually around 8-12 inches deep, making them ideal for an intimate space. For example, a 72-inch wide linear fireplace may have a height of 24 inches and a depth of 10 inches.

An important aspect of fireplace building is making sure that the measurements of the project are correct. A linear fireplace measures how long the firebox, opening and any other panels like a hearth, will be.

This dimension should be determined by measuring from one end wall to another horizontally or vertically.

For example, if you have a wall on either side of the fireplace, measure from the inside of one wall to the inside of the other. Measurements should account for any trim that may be added around the fireplace opening when determining the linear dimension.

Rumford fireplace dimensions.

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Developed by Count Rumford (Sir Benjamin Thompson, an American physicist and inventor) in the late 1700s, a Rumford fireplace is characterized by its tall, shallow firebox, sloping back wall and small hearth. The purpose of this design was to maximize heat output.

Typical dimensions for a Rumford fireplace are 33″ high, 42″ wide and 24″ deep. The firebox should be 2/3 of the total height (22″). The throat should measure 6-7″ high and 8-10″ wide. And the flue should be at least 10” in diameter.

Fireplace mantel dimensions.

A fireplace mantel should be proportionate to the size of the fireplace and room. Generally, a mantel width should measure one-third of the total width of the fireplace opening, while mantel height can range from 36 inches to 48 inches. The depth should extend 6 to 12 inches in front of the face of the fireplace, allowing for proper display of items and providing a sense of balance.

Fireplace mantel dimensions are an important factor to consider when installing or replacing a fireplace mantel.

The dimensions of the fireplace will determine what size mantel you can safely install, as well as the size and style of other pieces that may go along with it such as corbels or columns.

It is important to measure your existing fireplace to ensure that you purchase the right size and style of mantel.

When measuring your existing fireplace, be sure to measure both the width and height of the opening in your wall.

Many fireplace mantels are designed to fit within standard sizes, but depending on the design of your fireplace, there may be variations in dimensions that should be taken into consideration.

It is important to double-check the measurements of your fireplace against any mantel purchased to ensure that it will fit your specific fireplace opening.

Your fireplace mantel should also be measured in relation to the height of your ceiling and other elements within the room.

Depending on the size and shape of the room, you may need a taller or shorter mantel to fit the architecture of the space. If you are installing a fireplace with other pieces such as corbels or columns, these should also be taken into consideration when measuring for your mantel.

Measure both the width and height of any additional elements that will be included in order to ensure that they will fit correctly with your mantel.

Fireplace hearth dimensions.

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The size of a fireplace hearth can vary depending on the type and style of the fireplace. Generally, a standard rectangular hearth should be at least 18 inches deep and 48 inches wide. The front edge should extend at least 16 inches in front of the firebox opening and 8 inches to either side.

If you have a larger or more complicated design, you may need to adjust the dimensions accordingly. For safety, it is also important that the hearth be level and sloped away from the firebox to create a barrier between it and any combustible materials nearby.

Fireplace insert dimensions.

When shopping for a fireplace insert, you’ll want to make sure that the size of the insert will fit your existing fireplace opening. The most important measurement is the width of the opening. You’ll also need to know the depth and height of the opening.

A standard-sized fireplace insert usually measures between 20″ and 28″ wide, 13″ deep and up to 25″ high. If you want a larger model, look for inserts that measure up to 36″ wide, 20″ deep and 33″ high.

Knowing the dimensions of your fireplace opening can help you select the right size insert for your home.

Fireplace surround dimensions.

When it comes to installing a fireplace surround, the measurements are important. It’s not just about aesthetics but also safety. To ensure proper installation and reduce the risk of fire hazards, a fireplace surround should be installed with specific dimensions in mind.

The correct size of a fireplace surround depends on the size of the existing opening in your home. Generally, the opening should be at least 4 inches (10 cm) wider than the fireplace, and 6 inches (15 cm) higher than the top of the firebox.

The surround should also extend beyond the edges of the actual fireplace by at least 5 inches (12 cm). This will allow enough room for mortar to secure it in place.

Fireplace cord dimensions.

When shopping for wood, you’ll need to consider the dimensions of your fireplace. The width or breadth of your firebox should be no less than 15 inches and no greater than 20 inches. The depth (from hearth to back) should be at least 12 inches and not more than 18 inches deep.

Fireplace cord measurements are typically 16-inches in length, with a width of 8 inches and a height of 4 inches. Be sure to measure the exact dimensions of your fireplace before ordering the cord size that will fit best. Purchasing too small or too large a cord can leave you with an inefficient fire that produces more smoke than heat.

The amount of wood needed for your fireplace will depend on the size of your fireplace cord and how long you plan to burn your fire.

Fireplace cords usually come in two sizes—full or face cord. A full cord consists of 8-foot long logs that are 4-feet high, while a face cord is typically shorter at 4 feet and stacked only 2 feet high.

Fireplace opening dimensions.

The size of a fireplace opening can vary greatly depending on the type and style of fireplace you have. For instance, a traditional masonry fireplace may be slightly larger than an electric or gas unit.

Generally speaking, the minimum dimension for a fireplace opening is about 22 inches in width and 18 inches in height, while the maximum dimension is typically around 48-50 inches in width and 40-42 inches in height.

It is important to measure your specific fireplace opening before purchasing a new insert, stove or surround, as the size of the unit may not properly fit into an incorrectly sized opening.

Fireplace hearth dimensions code.

The National Fire Protection Association (NFPA) has established standards for fireplace hearth dimensions that must be adhered to. The standard size of a fireplace hearth is 36 inches wide and 18 inches deep, with the opening in front measuring 30” wide and 22” high.

All fireplaces must have at least 12 inches of clearance from combustible materials, including walls and furniture. The hearth must also extend a minimum of 16 inches from the opening of the fireplace.

Additionally, any logs or other fuel that is used in the fireplace should be placed at least 18 inches away from the firebox.

Fireplace framing dimensions.

The size of the framing for a fireplace will be determined by the size of your fireplace and its design. Generally, fireplaces should have a minimum 6” clearance from combustible materials on each side and in front; an 8″ to 10″ clearance is best.

The depth of the framing should also be taken into account when determining your fireplace’s size. The minimum depth should be 8″ and the maximum 16″, depending on your fireplace’s design.

Additionally, the framing should be at least 12″ above the finished hearth height. If a mantel is being installed, the framing must extend enough to provide support for it as well.

Fireplace raised hearth dimensions.

Along with the overall dimensions of a fireplace, the raised hearth must also be taken into consideration.

Generally, the raised hearth should have the same width as your fireplace and extend at least 12 inches past each side of the firebox opening. The front of the hearth should extend at least 16 inches beyond the firebox opening.

Additionally, if the material used for the raised hearth is stonework, then a minimum of 4 inches should be added to the depth of the hearth. This allows for proper support when sitting in front of the fire and ensures a safe and comfortable environment.

Fireplace built-ins dimensions.

When building a fireplace and its accompanying built-ins, it is important to consider the dimensions of the firebox, the shelf, and any other components of the built-in.

The firebox should be wide enough to comfortably accommodate logs while allowing air flow around them. For a standard size fireplace, this would typically range from 24 to 28 inches.

The shelf should be wide enough to support the weight of items placed on it, and this would typically range from 12 to 16 inches deep.

Additionally, the height of the firebox should be between 22-24 inches and the depth of built-ins should range from 8-14 inches.

How to measure a fireplace.

Before you start measuring a fireplace, it is important to understand its basic components. A fireplace typically includes an opening (the area between the mantel and the firebox), a hearth (the floor of the firebox), and the firebox (the walls of the box).

To accurately measure your fireplace, you will need a measuring tape and a few other items. Start by measuring the width of the opening from one side to the other and then the height of the opening.

Next, measure the width and depth of the hearth. Finally, measure each wall of the firebox separately – starting at one end, measure to the other end horizontally (width) and then measure up vertically (height).

It is important to make sure that you are recording the measurements accurately. Double-check your calculations and be sure to also take into account any protrusions (such as a mantel) or outcroppings that would affect the measurement of the fireplace.

Once you have all your measurements, add them together to get the total measurements of your fireplace. This is important information to provide when shopping for fireplace accessories or ordering replacement parts. Knowing the exact size of your fireplace will help ensure that you get the right items for it.


What is a standard size fireplace opening?

The size of a standard fireplace opening typically ranges from 28″ to 36″. The exact dimensions of the opening depend on the type of fireplace being used and the manufacturer’s specifications.

It is important to consult an expert before making any changes to your fireplace opening, as this could be potentially dangerous if not done correctly. Always follow all safety guidelines and wiring regulations when working with a fireplace.

Additionally, it is important to ensure the fireplace opening is properly insulated in order to ensure efficient and safe operation of your fireplace.

How tall and wide should a fireplace be?

The size of a fireplace should be determined by the space you have available and the type of fireplace being installed. Generally, fireplaces should be at least 12 inches wide, 28 to 36 inches deep, and 22 to 30 inches tall.

It is best to consult with a professional before deciding on the exact measurements for your fireplace.

The installation may require making modifications to the existing structure or building a new one. Depending on your needs, you may also require additional materials such as venting and insulation.

Can a fireplace be too big for a room?

The answer may depend on the size of the room and the desired look you are aiming for in your home. A fireplace that is too large may overpower a small space, making it feel cramped and uncomfortable.

On the other hand, a fireplace that is too small can be unappealing or even unsafe if it does not provide enough heat to warm the room. For this reason, it is important to select the right size fireplace for your space.

How much space is required around a fireplace?

This depends on the type of fireplace you have. For a standard wood burning fireplace, the US National Fire Protection Association recommends that at least 36 inches be allowed between any combustible material and the firebox. This includes walls, furniture and other items in your home.

If your space allows for it, adding an additional 12 inches to this range is recommended for added safety. For a gas fireplace, the clearance can be reduced to 30 inches from the firebox and any combustible materials.

How wide is a 42 inch fireplace?

The answer to this question varies depending on the type of fireplace. Generally, a 42 inch fireplace typically has an opening width of about 38 inches and a height of 36 inches. However, if you have a gas fireplace or other style, it may be different from these measurements.

What is code for wood around fireplace?

The code for wood around fireplaces is typically based on the type of fireplace, local building codes, and safety regulations.

Generally speaking, it is important to ensure that the combustible materials surrounding a fireplace are far enough away from the heat source so that they do not ignite or accumulate dangerous levels of heat.

For example, some codes require that wood be at least 12 inches away from the fireplace opening. Additionally, many codes require a mantle or other form of non-combustible material to protect combustible materials from sparks that may escape the fireplace.

It is important to consult your local building codes and safety regulations before installing any combustible materials around your fireplace.

What is code for distance between fireplace and mantel?

The answer to this question depends on the jurisdiction, as codes vary from region to region. Generally speaking, however, most codes require that a mantel be placed at least 12 inches away from the fireplace opening.

This is to ensure that combustible materials are not too close to the fire and therefore at risk of catching fire.

Additionally, this distance allows for adequate air circulation and helps to limit the amount of heat transferred from the fire. Some codes also require that mantels be at least 36 inches above the fireplace opening, again in order to protect combustible materials near the fire.

What are the dimensions of a 36 fireplace?

A 36 fireplace typically has a width of 36 inches, a height of 28 to 32 inches, and a depth of 15 to 18 inches. A deeper firebox may be needed if the fireplace is designed for burning logs instead of gas.

The dimensions can also vary depending on the manufacturer. Typically, prefabricated fireplaces are available in common sizes, such as 36 inches wide, which is the most common size for a fireplace.

If you are purchasing a custom-made fireplace, then you may be able to choose your own dimensions and design.

How high should a mantel be mounted above a fireplace?

The general rule of thumb is that a mantel should be mounted at least 60 inches above the fireplace opening, extending up to 66 inches for taller ceilings. However, it ultimately depends on the size of the mantel and how high your ceiling is.

For a mantel with an 8-10 inch shelf depth, mounting between 54-58 inches will provide a balanced look. For mantels with deeper shelf depths, mounting higher may be necessary for the visual balance to be maintained.

Additionally, if your ceiling is very high, you might want to mount your mantel higher than the standard measurements to add an impressive grandeur to the room. This will also help accentuate any artwork or decorations that are featured on the mantel.

How much wider should the mantle be above fireplace?

The size of the fireplace mantle should be two to three inches wider on each side than the fireplace opening. This will provide plenty of space for a variety of decorative items, such as candles and artwork, without being too overpowering in the room.

Additionally, mantel shelves are often much deeper than they are wide, so adding width on either side helps to visually balance the proportions of the fireplace. Finally, wider mantles can help to draw attention away from any imperfections in the fireplace opening that may be visible.

How high should a fireplace mantel be with 8 foot ceilings?

Generally, a fireplace mantel should be mounted between 60 and 66 inches off the floor. This allows for the proper placement of artwork or decorative items on top without it feeling too low or too high.

If your ceiling is higher than 8 feet, you may want to raise your mantel slightly higher in order to keep the overall proportions of your space balanced.

For example, if your ceiling is 10 feet high, you may want to set the mantel at 72 inches off the floor. This will keep your fireplace from looking too weighed down by the mantel and will help it feel more in proportion with its surroundings.


In conclusion, fireplace dimensions are an important consideration before buying or building a fireplace. It’s important to measure the space you have available and find a fireplace that will fit your specific needs. You should also consider factors such as the venting requirements and firebox size in order to determine if the fireplace is safe for your home and environment. With careful planning and consideration, you can find the perfect fireplace to fit your space.