Are you looking to add a cozy and efficient heating option to your home? A gas fireplace insert might be just the solution you need. With its easy-to-use operation and stylish design, a gas fireplace insert can transform a plain fireplace into a focal point of your room. 

However, before you rush to purchase one, it’s important to know how to measure for a gas fireplace insert to ensure a proper fit and safe installation.

Gas fireplace inserts must be measured for their width, height, and depth, as well as checking the manufacturer’s specifications for clearances and gas/electrical requirements. To ensure proper installation, you should consult a licensed professional.


Follow these steps to accurately measure for your gas fireplace insert:

Step 1: Measure the Width of the Fireplace Opening

The first step in measuring for a gas fireplace insert is to measure the width of the fireplace opening at the front, back, and middle. Take each measurement and record it. Once you have all three measurements, choose the smallest measurement as the width of the insert.

Step 2: Measure the Height of the Fireplace Opening

Next, measure the height of the fireplace opening from the hearth to the top of the opening. Record this measurement, as it will determine the height of the insert.

Step 3: Measure the Depth of the Fireplace

Measure the depth of the fireplace from the front to the back wall. This measurement will help determine the depth of the insert.

Step 4: Check Manufacturer’s Specifications

It’s important to check the manufacturer’s specifications for the recommended minimum and maximum clearances around the insert. These clearances are necessary to ensure safe installation and proper operation of the appliance. Make sure your measurements comply with the manufacturer’s guidelines.

Fireplace Measurement Form

Additionally, be sure to check the gas and electrical requirements for the insert. Make sure you have access to a gas line and electrical outlet that meet the manufacturer’s requirements. If you’re not sure about the requirements, consult with a licensed professional to ensure you have the necessary connections.

Step 5: Consider Gas and Electrical Requirements

Check the gas and electrical requirements for the insert. Make sure you have access to a gas line and electrical outlet that meet the manufacturer’s requirements. If you’re not sure about the requirements, consult with a licensed professional to ensure you have the necessary connections.

Step 6: Consult with a Professional

Finally, consult with a licensed professional to verify your measurements and ensure proper installation. A professional can also provide valuable advice on selecting the right gas fireplace insert for your needs and budget.

Tips for Selecting and Installing Your Gas Fireplace Insert

  • Choose a reputable manufacturer and installer. 
  • Look for brands with a proven track record of quality and reliability.
  • Consider the style and features that will best suit your home and personal preferences.
  • Prepare your fireplace and surrounding area for installation. Clear out any debris or obstructions, and ensure that the area is clean and dry.
  • Follow all installation instructions carefully. This includes proper venting and gas line connections, as well as ensuring that the insert is level and secure.

Choosing a gas fireplace insert can be an exciting decision, but it’s important to consider several factors to ensure that you make the right choice. Here are some tips and considerations to keep in mind:

  1. Size: The size of the gas fireplace insert is crucial to ensure that it fits properly in your existing fireplace opening. Make sure to measure accurately (as outlined in the previous section) and select an insert that meets those specifications. Keep in mind that a larger insert will produce more heat, but may require more clearances.
  2. Style: Gas fireplace inserts come in a range of styles, from traditional to contemporary. Consider the decor of your home and choose a style that complements it. Also, think about the ambiance you want to create – do you want a cozy, traditional look or a sleek, modern feel?
  3. Features: Gas fireplace inserts come with a range of features, including remote controls, adjustable flames, and built-in blowers. Think about which features are important to you, and make sure the insert you choose has them.
  4. Manufacturer and installer: Choose a reputable manufacturer with a good track record for quality and safety. Also, select an experienced installer who is licensed and insured. This will help ensure that the installation is done properly and that the insert operates safely and efficiently.
  5. Preparing the fireplace and surrounding area: Before installation, make sure to prepare the fireplace and surrounding area. Remove any debris, such as ash or soot, and clean the chimney. Also, ensure that the area around the fireplace is clear of any flammable materials, such as drapes or furniture.
  6. Venting: Gas fireplace inserts require proper venting to remove the combustion byproducts from the home. There are several venting options available, including direct venting and vent-free. Make sure to choose a venting option that meets local building codes and manufacturer specifications.

Types of Fireplace Depend on Location

The type of fireplace that is suitable for a particular location depends on numerous measurements, including the size of the room, the ceiling height, and the available ventilation. Here are some examples of how different types of fireplaces are affected by these measurements:

  1. Wood-burning fireplaces: These fireplaces require a chimney and adequate ventilation to operate safely. The size of the chimney must be appropriate for the size of the room and the height of the ceiling. Additionally, the room must have enough space to accommodate the fireplace and the required clearances around it.
  2. Gas fireplaces: These fireplaces can be installed in a wider range of locations than wood-burning fireplaces because they don’t require a chimney. However, gas fireplaces still require proper ventilation to operate safely. The size of the room and ceiling height can affect the size of the gas fireplace insert needed to provide sufficient heat.
  3. Electric fireplaces: These fireplaces are the most flexible in terms of location because they don’t require any venting or special clearances. However, the size of the room and ceiling height can still affect the size and type of electric fireplace that is suitable.

Overall, the type of fireplace that is suitable for a particular location depends on several measurements, including the size of the room, the ceiling height, and the available ventilation. It’s important to consult with a professional to ensure that the chosen fireplace is safe and appropriate for the space.

Frequently Asked Questions

Here are some frequently asked questions (FAQs) and answers about using an air fryer for the first time:

Q: How do I measure the width of my fireplace opening for a gas fireplace insert?

A: Measure the width of the opening at the front of the fireplace, as well as the width at the back of the fireplace. Take the smaller of the two measurements.

Q: How do I measure the height of my fireplace opening for a gas fireplace insert?

A: Measure the height of the opening from the floor to the bottom of the lintel bar, which is the horizontal bar that spans the opening.

Q: How do I measure the depth of my fireplace opening for a gas fireplace insert?

A: Measure the depth of the opening from the back wall to the front of the fireplace.

Q: Can I install a gas fireplace insert myself?

A: It is not recommended to install a gas fireplace insert yourself. Installation must be done by a licensed professional to ensure proper installation and safe operation.

Q: Why is it important to check the manufacturer’s specifications for clearances and gas/electrical requirements?

A: Each gas fireplace insert model has specific clearances and requirements that must be met to ensure safe operation. Failure to meet these requirements can result in a hazardous situation.

Q: How can I ensure that the gas fireplace insert I choose is the right size for my fireplace opening?

A: Consult with a licensed professional to ensure that the gas fireplace insert you choose is the appropriate size for your fireplace opening and meets all necessary clearances and requirements. Accurate measurements of the opening are also essential to ensure a proper fit.

Bottom Line

Measuring for a gas fireplace insert is a significant step in adding a cozy and efficient heating option to your home. By following these steps and consulting with a professional, you can ensure a safe and successful installation that will provide warmth and ambiance for years to come.

Alfred Lewis

Alfred Lewis

Alfred Lewis is an expert on fireplace inserts with a wealth of knowledge on the subject. He has a deep understanding of the different types, fuels, sizes, and styles of fireplace inserts available on the market, and is well-versed in the latest trends and innovations in the industry. He has a keen eye for design and can help homeowners choose the perfect fireplace insert to match their home’s decor and personal preferences.

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