Free shipping
Low Price
View Cart

    What You Need To Know Before Buying A Gas Fireplace Insert

    If you are considering renovating your fireplace, but don't want to invest the time or money to completely remodel the setup, a fireplace insert may be the thing you need!

    What You Need To Know Before Buying A Gas Fireplace Insert
    gas fireplace with white mantel

    How they work

    Gas fireplace inserts operate similarly to any other gas fireplace with the exception that they fit inside a pre-existing fireplace space. When a firebox is no longer able to be used in a factory-built fireplace or if you want to update a wood burning masonry fireplace, a fireplace insert is a great option.

    One important point to note is gas fireplace inserts can only be put into an existing wood burning fireplace. The system set up in gas fireplaces does not allow for an insert to be housed within it. Although, a wood burning fireplace can accommodate a wood burning or gas insert.

    What You Need To Know Before Buying A Gas Fireplace Insert
    inserting a gas insert

    If you are interested in purchasing a gas fireplace insert, here are a few pros and cons you need to consider before shopping.


    • You can easily convert your fireplace from wood to gas without opening the wall and destroying the current tile, stone, or brick.

    • Simple to install. If there is an active gas line in the existing fireplace, due to a previous gas log set, you can quickly slip the insert into position and attach the surrounds to cover the gaps between the edges of the insert and the existing fireplace.

    • Large range of styles. Gas inserts have dozens of design options that range from the traditional look of wood burning logs to linear boxes that include fire glass and fire art.
    What You Need To Know Before Buying A Gas Fireplace Insert
    front view of a gas insert


    • Must use a surround. Inserts only come in fixed sizes so there will always be a gap between the edge of the fireplace and the insert. This means you must have a surround. Anyone who wants a "sleek" trim around their fireplace i.e., no overlap, will need to consider another option.

    • Smaller viewing area. Because inserts are installed into an existing fireplace and cover part of the space with a surround, the viewing area of the flames is reduced. If a large open viewing space is a requirement for you, getting a fireplace insert may not be your best option.


    Direct Vent

    This type of pipe system has aluminum inner walls since the flue temperatures from propane and natural gas are cooler than solid fuel. The direct vent system is made up of an exhaust pipe that expels hot gases and an intake pipe that uses outdoor air for combustion. This combination of venting creates excellent heating and operational efficiency.

    What You Need To Know Before Buying A Gas Fireplace Insert
    direct vent setup graphic

    The B-vent system sucks in air from the room for combustion then sends exhaust through a singular pipe in the chimney system. Because the B-vent relies on indoor air for combustion, it tends to absorb all the heat you would expect a fireplace to put out. This type of venting is best for people who live in warmer climates and wish to use a fireplace for looks.

    What You Need To Know Before Buying A Gas Fireplace Insert
    b-vent setup graphic
    Vent Free

    The term "vent free" applies to fireplaces or inserts that burn gas and do not require any kind of chimney or vent system. Vent free systems are a great option for people who have budget restrictions or logistical difficulties installing a chimney. However, some places in the United States, including the entire state of California, have outlawed indoor vent-free gas appliances due to health concerns.

    What You Need To Know Before Buying A Gas Fireplace Insert
    vent free setup graphic


    Gas fireplace inserts need a gas line and sometimes, an electrical supply, to power ignition modules and blowers within the unit. If a gas line already exists and there is a nearby power source, your fireplace just earned itself a front-row ticket to being upgraded with a fireplace insert.

    If your appliance happens to not have either of these features, contact a local electrician to find out if it will be worth it to adapt your current system to fit an insert. Otherwise, you may need to destroy what you currently have and start over from scratch.

    Now that this article is coming to a close, if we haven't covered every detail you hoped we would, you can check out the full-length fireplace insert article here.

    That is sure to cover the rest of your questions on insert types, venting and installation. If not, please reach out to our NFI certified techs by email or phone.

    About the Author

    Amanda Hurd

    Amanda Hurd is a native Memphian, lover of linguistics, and blues music. She has worked in digital marketing for nearly a decade and loves to move people to action with written words. She is the Content Editor for the eFireplaceStore and eCanopy online stores.

    Amanda's obsession with writing extends beyond her professional career, bleeding over into her personal life. She has maintained a blog for nearly six years, regularly posts inspirational content online, and is working on completing her first fiction book!

    If she isn't off somewhere writing, you better believe she has her nose in a book getting ideas about what to write next!

    Questions About This Article

    All customer questions are answered by our NFI Certified Specialists free of charge!
    1 Question & 1 Answer
    from mapleton, iowa asked:
    August 16, 2021
    Does the Majestic Ruby 35" lp gas fireplace insert have a continuous pilot light flame OR does the pilot light automatically ignite when turned on?
    1 Answer
    The pilot will automatically spark when powered on. 
    Submitted by: Will M. on August 16, 2021

    Need Help?
    Sign Up for our Newsletter

    Find the Right Gas Logs
    For Your Fireplace

    Gas Log Calculator Gas Log Calculator
    Back to Top
    Sign-up for our Email!
    Enter your email for new arrivals and special offers.