What Is The Standard Size Of A Gas Fireplace?

by | Last updated on January 24, 2024

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Most fireplaces, whether gas or wood burning, typically have openings that are nominally

36 inches or 42 inches wide

.

What is a standard fireplace size?

The standard size of a fireplace is anywhere from

2 – 3 feet wide, 24 – 29 inches high, and always about 16 inches deep

. Of course, the opening could vary depending on your style and design ideas, as well as where you are locating the fireplace.

What is the average size of a gas fireplace?

Typically, gas fireplaces are classified into four sizes – small, medium, large, and extra-large. 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.

How do I choose the right size gas fireplace?

  1. Measure the front width of you fireplace.
  2. Measure the width at the back of your fireplace.
  3. Measure the depth from the front to the back of your fireplace.
  4. Measure the height from the top to bottom of the front your fireplace.

What is a standard mantel width?

For a quick reference, a 36-inch fireplace will probably have a mantel width of

48 inches

. A 42-inch fireplace will probably have a mantel width of 54 inches. The mantel should not be so wide that it reaches anything else, like a wall, window or door.

What is the standard opening for a fireplace?

The standard fireplace opening averages between

24 – 36 inches wide, 24 – 29 inches high, and about 16 inches deep

. The distance from the hearth to the fireplace damper should be about 37 inches.

How do you size a gas fireplace for a room?

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.

Will a gas fireplace heat a room?

Gas fireplaces are an efficient type of fireplace that are

typically good at providing heat for the room

in which they are located, and can be much more efficient and produce more heat compared to the existing masonry fireplace they replace.

How many BTU do I need for a gas fireplace?

Model BTUs Space it will Heat Crave 36 17,500 – 30,000 600 – 900 square feet Crave

48


21,000 – 40,000

800 – 1,300 square feet

Can I leave gas fireplace on all night?


No, you should not leave your gas fireplace on overnight as you risk carbon monoxide poisoning

. Although it’s never recommended, if your gas fireplace has been properly maintained and designed to run continuously, it may be safe to leave it on.

How do you size a gas fireplace log?

  1. Measure the front opening of your fireplace.
  2. Measure the back width of your fireplace.
  3. Measure the depth of the floor from back wall to the front of your fireplace.
  4. Measure the inside height of the fireplace from the floor to the lowest point inside the fireplace.

What brand of gas fireplace is the best?

  • Duluth Forge, Autumn Spice Finish Gas Fireplace.
  • Majestic, Quartz Series QUARTZ32IN Gas Fireplace.
  • Empire Comfort Systems, Boulevard Linear Gas Fireplace.
  • Pleasant Hearth, Full-Size Heritage Gas Fireplace.
  • Comfort Glow, Kozy World GFD2042 Belmont Gas Fireplace.

How deep is a standard mantel?

A depth of

7 inches

is ideal for most mantels, as it allows plenty of room to accommodate decorative objects. Keep in mind that the top and the sides of the mantel should be the same depth. First, use a measuring tape and pencil to measure and mark the mantel top to size.

How far should a mantle stick out?

A mantel should stick out

at least 6 inches (15.24cm) from the wall

. It’s the perfect depth that allows you to have a mantle effectively deflect heat without compromising aesthetics. You can extend it to have more depth for your decorative pieces, but we don’t recommend having it less than 6 inches (15.24cm).

Can a fireplace be too big?

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.

What is the standard height of a fireplace?

Again, “proper” height is relatively subjective to your fireplace, but average or standard fireplace mantel height construction is

around 54” above the hearth’s floor

.

David Martineau
Author
David Martineau
David is an interior designer and home improvement expert. With a degree in architecture, David has worked on various renovation projects and has written for several home and garden publications. David's expertise in decorating, renovation, and repair will help you create your dream home.