Knowledge Builders

what size of gas fireplace do i need

by Mckenzie Batz Published 3 years ago Updated 2 years ago
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The most common fireplace sizes are:

  • 24 inches by 24 inches
  • 36 inches by 30 inches
  • 48 inches by 32 inches

Full Answer

What is the best rated gas fireplace?

  • BEST OVERALL: Napoleon Grandville VF Series GVF36-2N 37″ Vent Free
  • BEST BANG FOR THE BUCK: ProCom Vent-Free Dual Fuel Fireplace Insert
  • BEST FLEXIBILITY: Empire Loft Series DVL25 Fireplace Insert
  • BEST DUAL FUEL: Superior DRI2000 Gas Fireplace Insert
  • BEST DIRECT VENT: Empire Tahoe Deluxe 36″ Direct-Vent NG Millivolt

More items...

What are the standard dimensions of a fireplace?

Typical fireplace dimensions depend on much space you want them to take up. The standard fireplace opening is between 24 and 36 inches wide, 24 and 29 inches high, and 16 inches deep. The distance from the hearth to the fireplace damper is about 37 inches. The rear of the firebox should be between 11 and 19 inches wide and 14 inches high.

What is the largest gas fireplace insert?

What is the biggest gas fireplace insert? Two FullView insert models fit your space and heating needs. The FV44i offers the largest viewing area and 40,000–16,300 BTUH. The smaller FV33i provides 31,000 to 13,000 BTUH.

Which gas fires are the most efficient?

Which Gas Fires Are The Most Efficient?

  • Open Front Gas fires. Open front gas fires look fantastic with their traditional open fire period aesthetic. ...
  • Outset Living Flame Gas Fires. Outset fires are those that sit on the hearth rather than being set into the chimney. ...
  • Outset Radiant Gas Fires. ...
  • Glass Fronted High Efficiency Gas Fires. ...
  • Balanced Flue High Efficiency Gas Fires. ...
  • Flueless Gas Fires. ...

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How do I know what size gas fireplace I need?

As a basic benchmark, a small gas fireplace will heat less than 500 sq. ft., a medium gas fireplace will heat between 500 – 1,000 sq. ft, a large gas fireplace will heat between 1,000 – 2,200 sq. ft., and an extra-large gas fireplace will heat over 2,200+ sq.

How many BTUs do I need for my gas fireplace?

You can expect a standard gas fireplace to be around 30-40,000BTUs. A gas fireplace heat output might be shortened, to 30kBTU for 30,000BTU for example, for simplicity purposes. What is this? BTU is a standard measurement of heat, and is short for British Thermal Unit.

Can a fireplace be too big for a room?

Regardless of heat output or TV size, the size of the fireplace should suit the size of the room. A small fireplace will be lost in a large space. Likewise, a large fireplace could overpower a tiny room. However, we see clients going too small far more often than going too big.

How many square feet will a fireplace insert heat?

Wood-burning inserts can heat anywhere from 1,000 to 3,000 sq. ft., depending on their size. Inserts are small enough to fit into most traditional masonry fireplaces. An insert designed to heat 1,500 square feet will burn for three to five hours before you need to reload; for 1,500 to 3,000 sq.

Is it expensive to run a gas fireplace all day?

Not at all. Using natural gas is one of the most inexpensive ways to heat your home. That's why gas fireplaces, gas fireplace inserts, outdoor gas fireplaces, even gas furnaces are such cost-effective heating options. Realistically, most gas-powered fireplaces will burn through about $1 worth of natural gas per day.

How many BTU do I need for a 20x20 room?

As a general rule, a 20×20 feet or 400 square feet room should use a 12,000 BTU or 1 Ton air conditioner. If your room is heavily shaded, you can save cost by using a 9,000 BTU or 0.75 Ton air conditioner.

What is the standard size for a fireplace?

The average fireplace is approximately 36 inches by 30 inches, but there is plenty of variation in the fireplaces available on the market. The most common fireplace sizes are: 24 inches by 24 inches.

How big should my TV be above fireplace?

The general rule of thumb is the tv should be about 2/3 of the width of whatever piece of furniture is anchoring it. So whether you're setting your TV on a console, hanging it above a credenza, or mounting it above the fireplace, you want “breathing room” on either side.

What size should a fireplace be?

A fireplace should be 24 – 72 inches (2 – 6 feet) wide. Generally, smaller rooms require smaller fireplaces, while bigger rooms benefit more from larger ones. Getting the dimensions wrong poses the risks of a fireplace that overpowers or does not meet a room's heating demands.

What is the average cost of a gas fireplace insert?

Gas fireplace inserts are installed in pre-existing, wood-burning fireplaces, making the overall cost far lower than installing an entirely new system. The insert itself will cost around $1,200, with labor costs running between $500 and $3,500 depending on the complexity of the job.

Is it worth having a fireplace insert?

Studies have shown that as much as 95 percent of the residual heat in a traditional wood fireplace is expelled outside. A wood-burning fireplace insert offers a slower, more efficient burn rate providing up to five hours of uninterrupted heat. It consumes less fuel and has heating efficiencies of 80+ percent!

Do gas fireplace inserts save money?

Lower Fuel Costs Many homeowners are upgrading their outdated heating systems with more cost-efficient gas fireplace inserts. Not only do they use less gas than a traditional furnace, but gas inserts are also a much more efficient heat source than many older wood-burning fireplaces.

How many BTU do I need for 800 square feet?

17,000 BTUWindow Air Conditioning Chart100 Sq. Ft.5,000 BTU400 Sq. Ft.10,500 BTU500 Sq. Ft.11,500 BTU800 Sq. Ft.17,000 BTU1,000 Sq. Ft.21,000 BTU2 more rows•Jun 8, 2021

Does gas fireplace use more gas than furnace?

Gas fireplaces use less gas than other traditional heating methods such as furnaces. The amount of gas that a fireplace uses is dependent on many factors such as the BTU rating, unit type, and how frequently the system is used.

How big is a fireplace?

The average fireplace is approximately 36 inches by 30 inches, but there is plenty of variation in the fireplaces available on the market. The most common fireplace sizes are:

How far off the floor should a fireplace be?

If this is the case, you probably want your fireplace to be at about eye level when seated – roughly 40-42 inches off the floor.

How high should a mantel be above a fireplace?

According to the National Fire Protection Agency (NFPA), the mantel must be at least 12 inches above the top of the fireplace box. Make sure to also check your local housing codes to see if their rules require more than a 12-inch cushion.

What is a fireplace surround?

A fireplace surround refers to all of the components of a fireplace outside of the firebox.

How far should a fireplace mantle stick out?

You want your fireplace mantle to stick out at least six inches, which will make sure it can deflect heat while still looking stylish.

How much does a fireplace add to a home?

Additionally, the survey found that over 83% of those surveyed estimated that a fireplace would add between $1,000 and $5,000 of value to a home.

How wide is a firebox?

The fireplace’s rear firebox is generally between 11-19 inches wide, with a height of 14 inches.

What does "size" mean in a fireplace?

When a customer talks about the “size” of a fireplace, they are usually referring to the physical dimensions of the unit. Many of us in the hearth industry refer to “size” in terms of how much space a fireplace will heat, rather than the “size” of the glass or the dimensions of a certain model.

What is the BTU of a fireplace?

Mid-size fireplaces are in the 30-60,000 BTU range and smaller dimensionally. Your WE LOVE FIRE dealer can help determine what size and/or model would be a good choice for your home. Or, see our BTU calculator to get a sense of how much heat you might want.

Is the size of a fireplace important?

The amount of heat and the physical size of a fireplace are both important, but there are a few other questions that should be answered before a specific product is selected.

Can you have an electric fireplace in your home?

Do not rule out an electric fireplace in a couple of areas in your home. There are lots of different sizes and special effects that you and your family will enjoy.

Can you install an electric fireplace?

The benefits of electric fireplaces include: ease of installation. Literally, anywhere there’s a wall, you can install an electric. With the heating element on, electric heat is 100% efficient. With the element off, you can enjoy the “flames” (some call it “moving wall art”) year-round.

Is a gas fireplace a good choice?

Most people are aware that a gas fireplace is extremely convenient. Many people are not aware of the huge selection of gas fireplaces. There is equipment that can be ducted to an adjacent room. Equipment with several log and “media” options. There are traditional style fireplaces with large BTU outputs that are sixty inches wide and four feet high! They’re perfect for a great room.

How big is a fireplace?

An average fireplace is about 36”x30”. When it comes to the actual dimensions of a fireplace, these can be found in just about any size larger than 24”x24”, all the way up to 48”x32” and higher. The physical size of a fireplace insert is often listed by the width in inches, and they tend to range from about 20” to 60”.

How to measure fireplace size?

To calculate fireplace size, measure the width, length, and height of your room in inches. Multiply these three numbers together to determine the room’s volume, then multiply that number by four, which will give you a close minimum heat output. You can select an appropriate size with the original dimensions.

How to size a fireplace mantel?

To do this, just make sure that the mantel shelf width divided by two is less than the width from the fireplace center to any wall, door, window, or shelf.

What is the most important factor when selecting a fireplace?

While heat output matters, most people no longer rely on fireplaces as their only heat source, so size is the most important factor when it comes to selecting one. You’ll want a fireplace that doesn’t overpower a small room or get swallowed up in a big room.

How much heat does a gas fireplace use?

For another idea on how much area fireplaces can heat, are some of the most common heat outputs for sizing gas fireplace inserts: 1 Small: 10,000-18,000 BTU – heats up to 800 sq. ft. 2 Medium: 25,000-30,000 BTU – heats up to 1,400 sq. ft. 3 Large: 35,000-40,000 BTU – heats up to 1,800 sq. ft.

How to divide shelf width for fireplace?

If you’re getting a fireplace mainly for aesthetics, then simply take your mantel’s shelf width and divide it by two. Then, just make sure it’s less than the width from the fireplace center to any wall, door, window, or shelf.

What is the first thing to decide on when it comes to fireplace size?

When it comes to fireplace size as compared to room size, the first thing to decide on is what kind of unit you are planning on installing.

How big is an electric fireplace?

There are electric fireplaces perfect to be situated in right smack in the middle of a living room and usually have a dimension of 31 inches in height, a width of 44 inches, and a depth of 13 inches.

How deep is a fireplace?

A fireplace’s depth is measured from the back of the firebox to the opening—the average depth of a fireplace is about 16 inches deep.

How tall should a fireplace mantle be?

With the height, generally, a mantle should at least be 12 inches above the opening. For a standard fireplace with a 36 inches width, it should be 29 inches tall.

What is a fireplace insert?

A fireplace insert is usually a sealed box taking the place of an old masonry fireplace. A fireplace insert can be powered by wood, gas, or propane, and they produce more heat and consume less fuel than a traditional fireplace. There are two types of fireplace inserts, and they could either be powered by gas or wood.

How tall is a masonry fireplace?

The height of a masonry fireplace will depend solely on the size of the room where the fireplace will be located.

How big is a gas fireplace insert?

Small gas-powered fireplace inserts have a width, height, and depth of 26, 17, and 14 inches.

Why do outdoor fireplaces come in bigger sizes?

This type of fireplace usually comes in bigger sizes because they are out in the open and are more vulnerable to air and weather.

What is the most important aspect to consider when choosing a fireplace?

The size of the room is an important criterion regarding this major purchase; however, the most important aspect to consider, in order to optimize your fireplace’s efficiency, is its power, its capacity to heat, expressed in BTU.

Why do we need a fireplace in our living room?

But to make sure everyone feels and appreciates it, your fireplace needs to produce adequate heat, not too hot, not too cold.

HOW MUCH HEAT DOES A GAS FIREPLACE PUT OUT?

He also points out that “a lot of high-efficiency gas fireplaces have a large turn-down ratio—meaning, they can go from 40,000 BTU down to 12,000 BTU, enough to heat the average bedroom or dining room.” He adds that if you had a 40,000 BTU fireplace and only needed to use 50 percent of its capacity, you’d pay less than $1 an hour to operate.

Can you install a gas fireplace in direct contact with a combustible wall?

What has made them so is the technology and installation flexibility of gas-fueled models. Since no actual combustion occurs in gas fireplaces, zero-clearance installation is possible, which, according to Monessen Hearth Systems, means that “these fireplaces can be installed in direct contact with combustible walls and floors.

Do you need a fireplace to buy a house?

Fireplaces have always been among the top amenities for homeowners looking to buy a new house. In fact, they rank just second behind outdoor patios, decks and porches, according to the National Association of Home Builders ( NAHB ). While the cost of adding a fireplace to an existing home used to be prohibitively expensive—requiring the creation of an exterior stone chimney, flue, firebox and, in many cases, floor supports to accommodate the weight of the hearth—today’s options are not only affordable, but a relatively easy home improvement.

Do vents need to be inspected annually?

In addition, the HPBA recommends that all vents for vented gas fireplaces be inspected on an annual basis by a chimney sweep certified by the Chimney Safety Institute of America and also recommends the installation of a carbon monoxide detector with all hearth products. Advertisement.

Does a wood burning fireplace have a damper?

With wood, a certain amount of time is required to light the fire, turn that energy into heat and then get that heat into a room.”. Ruppa points out that in contrast to a gas fireplace, whose warmth is thermostatically controlled, a wood-burning unit comes with only an air control—the damper. That, he says “allows you to control the amount ...

Is it expensive to add a fireplace to a house?

While the cost of adding a fireplace to an existing home used to be prohibitively expensive—requiring the creation of an exterior stone chimney, flue, firebox and, in many cases, floor supports to accommodate the weight of the hearth—today’s options are not only affordable, but a relatively easy home improvement.

What is required for a gas fireplace?

A gas fireplace may have requirements for both the hearth on which it sits (such as thickness) and the heath extension that protrudes out the front (such as minimum coverage area).

Why is a direct vent fireplace less onerous?

A direct vent gas fireplace can therefore have less onerous hearth requirements because they will have a glass front.

What does "open front" mean in fireplace?

An open front means that natural vent gas fireplace inserts typically require a more suitably sized hearth for safety reasons.

What is a hearth in a fireplace?

Hearths are the platform on which fireplaces are placed to help protect the floor of a home.

Is a direct vent fireplace a natural gas fireplace?

Direct vent gas fireplaces can come under the category of built-in gas fireplaces and differ to natural vent gas fireplaces in that both waste and clean air is vented externally.

Can a fireplace insert be vented?

They can commonly be found as inserts for installation into existing masonry fireplaces but may also be standalone units that need to be vented through the roof with a pipe.

Do you need a hearth for a gas fireplace?

The requirements for a hearth for a gas fireplace will typically come down to what is required by the manufacturer for that particular model of gas fireplace . However, natural vent gas fireplaces often require a hearth while direct vent and ventless versions may not, depending on the manufacturer requirements and local building codes and regulations.

How many measurements are needed to measure a firebox?

It's important that the measurements be as accurate as possible, with no obstructions in the way to obscure them. There’s a total of four measurements that need to be taken: the front width of the firebox opening, the rear width, depth, and height.

How high should a firebox be?

The height of the firebox opening should be a minimum of 18 inches to accommodate most gas log sets.

How to calculate BTUs for a room?

Multiply the room’s length, width, and height to get the cubic feet of the room. Then multiply by 20 and the result is the maximum BTUs allowed for that room. For example, if a room is 1,400 cubic feet, then it can’t have a ventless logs set radiating more than 28,000 BTUs. The firebox clearances for ventless gas logs can vary and are included with the product info and specifications most of the time.

Why are gas logs more realistic?

However, vented gas log sets look more realistic because the flames burn higher and the logs can be stacked more like real firewood, allowing the flames to curl around the logs.

How wide is a log set?

Rear width needs to be at least as wide as the log set. For example: If the log set is 24 inches wide, the rear width of your firebox also needs to be 24 inches wide. Depth should be 12-14 inches. If you are measuring for a see-thru gas log set, the depth needs to be 16-18 inches.

What is the opening width of a log set?

For example A 24-inch log set needs an opening width of at least 28 inches.

Can you convert a wood burning fireplace to gas?

Whether you’re looking to convert your wood-burning fireplace over to gas, or simply want to replace your existing gas log set, it’s important to get the right size that will have the correct clearances for your fireplace.

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