Electric vs Gas Fireplace: Cost, Heat, and Which to Choose (2026)

The choice between an electric and a gas fireplace comes down to a trade-off: electric is cheap and simple to install but expensive per unit of heat; gas costs more to install but heats a room faster and cheaper, and keeps working in a power outage. For ambiance-first use, electric usually wins on total cost. For real supplemental heat, gas often does.

Here’s how they actually compare on running cost, install, heat output, and the things that don’t show up on a spec sheet.

Running Cost: The Numbers

An electric fireplace is essentially a space heater with a flame effect. On heat mode it draws about 1,500W and is ~100% efficient at the point of use. A gas fireplace burns natural gas at 20,000–40,000 BTU/hour and vents some heat outside, so it’s 70–85% efficient depending on the model — but gas is far cheaper per BTU.

Electric (1,500W)

$0

Gas (30,000 BTU)

$0

Gas (20,000 BTU)

$0

The per-hour costs look similar, but they’re not delivering the same thing. The electric unit puts out about 5,000 BTU/hour of heat for its $0.285; the gas unit puts out 20,000–40,000 BTU/hour for $0.30–$0.60. Per unit of heat, gas is dramatically cheaper — which is why gas wins when you actually want to warm a room, and the flame-effect-only electric mode (no heating element) costs just pennies an hour.

Installation: Where Electric Wins Big

	Electric	Gas
Unit cost	$100–$1,000	$1,500–$4,000
Installation	$0–$500	$2,000–$5,000+
Requires gas line	No	Yes
Requires venting/chimney	No	Yes (direct-vent or B-vent)
Requires 120V outlet	Yes	Often (for ignition/blower)
DIY-friendly	Yes (plug-in models)	No

A plug-in electric fireplace is genuinely a plug-and-go appliance — many just sit on the floor or mount to a wall. A gas fireplace needs a gas line run, venting through a wall or roof, and a professional install with permits. That upfront gap of several thousand dollars is the single biggest factor in most decisions.

The Outage Question

Note the caveat: many modern gas fireplaces use an electronic ignition and a blower that need household power. Look specifically for a model with a standing pilot light or millivolt/battery ignition if outage heat is the goal.

Heat, Ambiance, and Safety

Heat output: Gas wins decisively. A gas fireplace can heat a 1,000+ sq ft space; an electric unit is realistically a 400–500 sq ft supplemental heater capped by the 1,500W of a standard outlet.

Ambiance: Subjective, but gas produces a real flame, while electric uses LED flame effects that have gotten convincing but aren’t the real thing. Electric does offer flame-without-heat mode for summer ambiance.

Safety and air quality: Electric produces no combustion, no carbon monoxide, and stays cool to the touch — the better choice for homes with small children or anyone sensitive to indoor air quality. Gas fireplaces are sealed (direct-vent) or require careful ventilation; ventless gas models burn indoor air and add moisture and combustion byproducts to the room, and are banned in some jurisdictions. Always pair any gas appliance with a CO detector.

Maintenance: Electric is essentially maintenance-free. Gas needs periodic inspection of the venting, burner, and ignition.

Which Should You Choose?

Choose electric if you want low upfront cost, easy or DIY installation, flame ambiance more than serious heat, no combustion in the home, or you rent and can’t modify the house.

Choose gas if you want to genuinely heat a room, value the lowest running cost per unit of heat, want heat during power outages (with the right ignition), and don’t mind the higher install cost and a gas line.

Frequently Asked Questions

Is an electric or gas fireplace cheaper to run?

Per hour they’re similar — about $0.29 for a 1,500W electric unit vs $0.30–$0.60 for a gas unit at national rates. But gas delivers several times more heat for that money, so per unit of heat gas is much cheaper. For flame ambiance without heating, electric is cheapest at just pennies per hour.

Which is cheaper to install?

Electric, by a wide margin. A plug-in electric fireplace can cost $100–$1,000 with little or no installation. A gas fireplace runs $1,500–$4,000 for the unit plus $2,000–$5,000+ for the gas line, venting, and professional installation.

Does a gas fireplace work during a power outage?

It can, but only if it has a standing pilot light or a battery/millivolt ignition. Models with electronic ignition and a powered blower need household electricity and won’t run in an outage. An electric fireplace never works without power.

Are electric fireplaces efficient?

At the point of use, yes — they convert nearly 100% of the electricity to heat. But electricity is expensive per BTU, so a high efficiency rating doesn’t make them cheap to heat with. They’re capped at about 5,000 BTU/hour on a standard outlet, which limits them to supplemental heating of a single room.

Is a ventless gas fireplace safe?

Ventless (vent-free) gas fireplaces burn indoor air and release combustion byproducts and moisture into the room. They include oxygen-depletion sensors, but they’re restricted or banned in some states and not recommended for bedrooms or tightly sealed homes. Direct-vent models, which exhaust outside through a sealed system, are the safer choice. Always use a carbon monoxide detector.