Looking for fireplace insert gas cost in Knoxville, TN? Call GasFireplaceInsert Experts for a contact a provider — no obligation. Licensed, insured certified gas fireplace pros serve Knoxville and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

When estimating a gas fireplace project, several variables shift the final number. The type of unit—whether you choose a direct vent, vent-free, or an insert—plays a big role. You also have to account for the labor required to run new gas lines or update venting through your walls and roof. Customizing the surround, including stone, tile, or a new mantel, adds to the material costs. If you are converting an existing wood-burning fireplace, the complexity of the chimney liner installation will impact the total. Exact pricing confirmed free on the call.

About this service

Several factors influence the total cost of adding a gas insert, including the type of finish, remote control capabilities, and the complexity of the gas line installation. Costs can fluctuate based on whether your chimney needs a new liner or if specific masonry work is required to seat the unit.

Summer is the smartest time to plan a new fireplace installation or replacement. Because contractors are not dealing with the winter rush, you often have more flexibility with scheduling appointments. It is the perfect opportunity to renovate your fireplace surround or upgrade to a more efficient model while you aren't reliant on it for daily heat.

Frequently asked in Knoxville

What's the average cost of a gas fireplace insert?

What are the disadvantages of a gas fireplace insert?

Some disadvantages can include the need for a gas line and proper ventilation, which pros will assess. While generally efficient, improper installation could lead to heat loss. A pro can walk you through potential drawbacks and how they might apply to your home in Knoxville.

Can you put a gas fireplace insert in an existing fireplace?

Absolutely. Most gas fireplace inserts are designed to fit into existing masonry or pre-fabricated fireplaces. The pros will check the dimensions and structural integrity of your current fireplace to ensure a proper and safe fit in your Knoxville home.

What is the best gas fireplace insert for 2026?

What are the disadvantages of a gas fireplace?

Main concerns often revolve around the need for a gas line and proper venting to the outside. Some people also find the flame less natural than wood-burning fires. A licensed pro can explain these points and how they are managed in Knoxville installations.

What is the lifespan of a gas fireplace?

With regular maintenance, a gas fireplace insert can last 15-20 years or more. The lifespan depends on the quality of the unit and how well it's cared for. Pros can advise on maintenance schedules to keep your Knoxville fireplace running smoothly.

Also serving nearby: Asheville · Chattanooga · Murfreesboro · Roswell · Sandy Springs

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More on this: CSIA gas appliance guidance — venting and inspection.

Service area details

198,162residents

2,007per sq mile

8ZIP codes served

Serving all of Knoxville — population 198,162; about 2,007 residents per square mile across 98.7 sq mi. ZIP codes covered include 37901, 37902, 37909, 37912, 37914, 37915, 37916, 37917.

Neighborhoods served in Knoxville: Downtown Knoxville, Bearden, West Knoxville, North Knoxville, South Knoxville, Old City — and every surrounding area.