A gas fireplace insert lets you set flames ablaze with a flick of a switch. Here's what to look for to choose the best option for you.
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Gas fireplace inserts provide an easy-care, heat-efficient source for warm, glowing fires. This natural gas-powered alternative is great for those who don't want to deal with the log-stacking and ash-hauling chores associated with wood-burning fireplaces. Because most are lit by simply pressing a button or flipping a switch, gas fireplaces provide a nearly effortless way to warm up a room.

Essentially, a gas fireplace insert consists of a firebox equipped with a steel or cast-iron surround, a log and burner set, and a decorative faceplate that fills the gap between the insert's surround and the sides of a fireplace opening. Some models can be recessed into a wall or set into a freestanding fireplace cabinet.

Gas fireplace inserts require piping for gas and electric wiring for switches and thermostats as well as proper firebox and flue placement. Due to the complexity of installation and safety concerns, this is a job best left to professionals. Generally, it will cost between $2,000 and $5,000 to purchase and have a gas fireplace insert installed, with prices varying by insert model and difficulty of installation.

living room with white fireplace
Credit: David Patterson

Types of Gas Fireplace Inserts

Available in a range of shapes and sizes, gas fireplace inserts are categorized as vented and vent-free types. The best option for you will depend on your existing fireplace or available space and design preferences.

Direct-vent models are ideal for retrofitting existing fireplaces because their flue systems are designed to hook up to existing chimneys; they can also be installed to vent directly out an exterior wall. Top-vent or B-vent versions also directly vent to the outside but are less efficient than direct-vent options.

Vent-free or ventless gas fireplace inserts require no chimney or exterior venting and can be placed into an existing fireplace, a wall, or a freestanding cabinet. They draw oxygen from adjacent rooms and are best run for short periods of time. Look for models with oxygen depletion sensors that automatically switch off burners when a room's oxygen levels become too low.

When shopping for a gas fireplace insert, it's important to know the exact measurements of your existing fireplace opening or the space available for a vent-free version. Know the size of the room you want to heat as warming capacities differ. Evaluate models' efficiency ratings to ensure you get the most efficient model you can afford.

Gas Fireplace Insert Benefits

Switch on a gas fireplace, and you'll understand the advantages over log-fueled versions. In general, gas fireplace inserts eliminate drafts, emit more heat, disperse fewer pollutants, and are much easier to maintain than wood-burning fireplaces. They are simply operated with the flick of a switch or via a handheld remote. Some burners blaze brightly or glow like smoldering coals, while others let you adjust the height of the flames. Although most are equipped with ceramic logs, some gas fireplace burners set flames flickering amid beds of clear or colored fireproof glass rocks, stacks of smooth-sided river stones, or piles of faux charcoal briquettes.

Take time to compare decorative faceplates, fireplace cabinets, and burner systems. Although functionality trumps form when it comes to fire safety, fireplaces and the flames radiating within are meant to be gazed upon and appreciated for both their calm-inducing vibes and the warmth they produce.

Best Gas Fireplace Inserts

Enjoy cozy warmth and dancing flames on demand with these top picks for gas fireplace inserts.

Related Items

Most Reviewed: Duluth Forge Vent Free Dual Fuel Ventless Gas Fireplace Insert

from $1,189, Amazon

This ventless gas fireplace insert offers customizable warmth for the whole room. Operated by remote control, it can heat up to a 1,350-square-foot area to your desired temperature setting. One five-star reviewer writes that their "main furnace does not run while using the fireplace during the day." Safety features include an oxygen depletion sensor and an automatic shut-off, and hand-painted ceramic fiber logs give it a realistic look. 

Best Vented: Kingsman Fireplaces Direct Vent Natural Gas Fireplace Insert

$2,000 (was $2,443), Wayfair

Convert your wood-burning fireplace to a cleaner, more efficient alternative with a vented gas fireplace insert. This model pulls fresh air from outside and vents exhaust through your existing chimney or special ductwork, creating a closed system that won't impact your indoor air quality. A heat-activated blower with variable speed controls lets you adjust how it distributes warm air into the room, and a safety screen provides another layer of protection. Choose between logs or decorative glass and black, copper, or pewter finishes to coordinate with the overall design of the room. To install this gas fireplace insert, you'll need a gas line and professional help. 

Credit: Courtesy of Walmart

Best All-Inclusive: ProCom Dual Fuel Vent Free Gas Fireplace System

$1,150, Walmart

This gas fireplace system includes everything you need to create a cozy focal point, including a wood mantel, vent-free insert, remote control, and ceramic fiber logs. It's designed to produce up to 32,000 BTU of heat, which is enough to warm 1,500 square feet of space. An antique white finish gives the mantel an elegant appearance. 

Credit: Courtesy of The Home Depot

Best Budget-Friendly: ProCom Universal Ventless Firebox

$639, The Home Depot

Designed to fit any standard 32-inch fireplace, this ventless gas insert offers a budget-friendly option for customizing your fireplace. Decorative panels mimic the look of brick inside the firebox, and a draw screen provides added safety. One five-star reviewer writes that they've owned a ProCom insert for over 10 years and use it "all winter, every winter." Note that the log set and blower are not included, so you'll need to purchase those separately. 

Best for Small Spaces: Pleasant Hearth Gas Fireplace Firebox

$508, Lowe's

Best for areas measuring less than 500 square feet, this vent-free gas fireplace insert will enhance the cozy feel of your living room. Its zero-clearance design eases installation in tight spaces, and a matte black finish gives it a clean, modern look. For a decorative touch, you can line the firebox's flat face with noncombustible materials such as tile, marble, or slate. The interior brick panels and log set are sold separately. 

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