How much does a fireplace insert cost?

Wood insert (installed): $2,500-$6,000 (includes unit, chimney liner, and labor). Gas insert (installed): $2,500-$6,500 (includes unit, gas line, venting, and labor). Electric insert: $200-$2,000 (plug-in, minimal installation). The installed cost varies by: unit quality, chimney condition, gas line distance, and labor rates. A gas insert is the most popular choice (convenience + efficiency + reasonable cost).

Is a fireplace insert worth it?

Yes. An old open fireplace is a net heat loss (loses more heat than it produces). A fireplace insert converts it to a net heat gain (70-85% efficiency). Annual heating savings: $200-$600 depending on fuel type and how much you use it. Zone heating (heating the room you are in with the insert, lowering the thermostat for the rest of the house) produces the biggest savings. Plus: the home is warmer, the fire is more enjoyable, and the insert adds resale value.

Can I install a fireplace insert myself?

Electric inserts: yes (plug and play, no installation needed). Gas inserts: generally no (requires a licensed professional for gas line connection and venting). Wood inserts: possibly, if you are comfortable with chimney work (installing a stainless steel liner through the chimney). Most jurisdictions require permits and inspections for gas and wood insert installations. For safety: hire a certified installer (NFI-certified for gas, WETT-certified for wood).

What is the difference between a fireplace insert and a freestanding stove?

A fireplace insert fits inside an existing masonry fireplace opening. A freestanding stove sits in front of or away from the fireplace (or in a room with no fireplace). Inserts use the existing chimney (with a liner). Freestanding stoves can vent through a wall or new chimney pipe. If you have an existing fireplace: an insert is the cleaner, more integrated option. If you do not have a fireplace: a freestanding stove is the way to go.

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Woodworking & Lumber

Fireplace Insert Guide: Wood, Gas & Electric Options

Lumberama Editorial Team, Heating & Fireplace Specialists Jun 11, 2026 13 min read

Why a Fireplace Insert

A traditional open masonry fireplace is beautiful but terribly inefficient. It draws warm air from the room and sends 80-90% of the heat up the chimney (net heat loss). A fireplace insert is a sealed, insulated firebox that fits inside the existing fireplace opening. Benefits: 70-85% heating efficiency (vs. 10-20% for an open fireplace), heats 1,000-2,500 sq ft (depending on the unit), reduces heating bills, improves air quality (sealed combustion reduces smoke in the home), and maintains the look and feel of a real fire.

Wood-Burning Inserts

A cast iron or steel firebox with a glass door and blower fan. Burns seasoned firewood. Efficiency: 70-80%. Heat output: 40,000-80,000 BTU. Heats 1,000-2,500 sq ft. A stainless steel liner runs from the insert up through the existing chimney. Cost: $1,500-$4,000 (unit) + $1,000-$2,000 (liner and installation). Pros: real fire, uses free or cheap fuel (if you cut your own wood), and high heat output. Cons: requires hauling, splitting, and storing firewood, needs regular chimney maintenance, and requires manual operation. Best for: rural homeowners with access to firewood who want maximum heat output. Brands: Regency, Napoleon, Osburn, Lopi.

Gas Inserts

Burns natural gas or propane. A sealed firebox with ceramic logs or modern glass media. Efficiency: 75-85%. Heat output: 20,000-40,000 BTU. Heats 800-2,000 sq ft. Turns on and off with a switch, remote, or thermostat. No chimney liner needed for direct-vent models (coaxial vent through the existing chimney or wall). Cost: $2,000-$5,000 (unit) + $500-$1,500 (installation). Pros: convenience (no wood, no mess, instant on/off), clean (no smoke, no ash), thermostatic control (set the temperature and forget it), and zone heating (heat the room you are in without heating the whole house). Cons: higher fuel cost than wood (but lower than electric heat), requires a gas line. Best for: homeowners who want the look and warmth of a fire with the convenience of a furnace. Brands: Heat & Glo, Napoleon, Majestic, Regency.

Electric Inserts

A plug-in unit that fits in the fireplace opening. LED flame effect (remarkably realistic in modern units). Built-in heater (1,500 watts, heats a single room). No venting needed. No gas line needed. Cost: $200-$2,000 (unit). No installation cost beyond plugging in. Pros: cheapest to buy, easiest to install (plug and play), no chimney or gas line required, safe for apartments and condos. Cons: limited heat output (5,100 BTU, heats one room), higher operating cost than gas ($0.15-$0.25/hour), and the flame effect, while improved, is not as realistic as a real fire. Best for: supplemental heat, ambiance, and locations without a chimney or gas line. Brands: Dimplex, SimpliFire, ClassicFlame.

Sizing

Calculate the square footage you want to heat. 1,000 BTU heats approximately 25 sq ft. A 1,500 sq ft area: needs approximately 60,000 BTU. Wood inserts provide the most heat. Gas inserts provide moderate heat. Electric inserts provide supplemental heat only. Choose based on your primary goal: maximum heat (wood), convenient heat (gas), or ambiance with some heat (electric).