When you’re choosing an indoor fireplace, the biggest question is simple: Which one actually heats better? Electric fireplaces, gas fireplaces, and wood-burning fireplaces all produce warmth, but they do it in very different ways.
Their heat output, efficiency, installation needs, and overall performance can vary dramatically.
This guide gives you a direct, real-world comparison so you can understand exactly how each fuel type performs indoors — in small rooms, large living spaces, and whole-home layouts.
Before comparing fireplace types, it helps to understand two technical terms that dictate your comfort:
Different fireplace types produce different BTU ranges, and their efficiency dramatically affects real-world performance.
For a full breakdown of energy loss, see our Fireplace Efficiency Guide.
Electric fireplaces don’t burn fuel at all — they convert electricity directly into heat using a built-in heater.
According to the Department of Energy, electric resistance heating is 100% energy efficient in the sense that all the electricity is converted into heat.
Because there’s no venting system, no chimney, and no combustion, all that warmth stays inside the room.
Most electric fireplaces deliver 4,000 to 5,000 BTUs, which is sufficient for supplemental zone heating.
However, powerful 240V hardwired units, such as select models in the Dimplex IgniteXL series, can reach 8,000 to 10,000 BTUs.
Featured: Dimplex IgniteXL 50-In Electric Fireplace offering seamless installation and efficient heating.
Electric fireplaces are ideal for:
They provide steady, predictable heat, but they are generally not designed to heat large or open-concept spaces on their own.
Close to 100%, because nothing escapes outdoors.
Gas fireplaces, especially direct-vent units, are some of the most popular indoor heating options.
They burn natural gas or propane and use a sealed firebox with a vent pipe that brings in outdoor air and expels combustion gases.
Experts at Bob Vila note that gas inserts are an excellent way to update an old masonry fireplace, significantly increasing heating efficiency over an open hearth.
Modern direct-vent gas fireplaces offer 15,000 to 40,000+ BTUs, depending on size and model. High-performance units, like the Empire Rushmore series, are specifically engineered to output massive amounts of heat.
Featured: Empire Rushmore TruFlame Clean Face 36" - A high-output direct vent solution.
Gas fireplaces excel in:
Because gas fireplaces combine radiant heat (from the ceramic logs and glass) with convection heat (air circulating around the firebox), they deliver fast, powerful warmth.
Ranges from 70% to 85% depending on the model. Direct-vent units are the most efficient gas category because they are sealed systems.
Wood-burning fireplaces come in two forms: traditional open-hearth fireplaces and EPA-certified wood inserts.
Their heating performance differs drastically.
For detailed advice on selecting cleaner burning options, the EPA Burn Wise program provides guidelines on certified wood-burning appliances that reduce smoke and increase heat.
Open hearths look beautiful, but are poor heaters. They often deliver only 10–20% efficiency, and may even pull warm indoor air up the chimney, creating a net heat loss.
These are sealed fireboxes installed inside masonry fireplaces.
They generate huge heat output with excellent efficiency. Brands like Enerzone specialize in these high-efficiency inserts.
Wood inserts commonly produce 30,000 to 80,000 BTUs, depending on firebox size.
Large units like the Enerzone Destination 2.3-I can heat considerable square footage.
Featured: Enerzone Destination 2.3-I Wood Insert for maximum heating capacity.
Wood inserts are best for:
Wood produces strong radiant heat, warming people, furniture, and surfaces directly, which creates that "bone-warming" sensation.
60–75% for most EPA wood inserts. This is much higher than traditional wood fireplaces but slightly lower than electric.
When deciding between wood and gas, Family Handyman highlights that while wood offers unmatched ambiance and heat, gas offers superior convenience.
Here is how they stack up against electric options:
| Feature | Electric Fireplaces | Gas Fireplaces (Direct Vent) | Wood Inserts (EPA) |
|---|---|---|---|
| Heat Output | ★★☆☆☆ (Low/Zone) | ★★★★☆ (High) | ★★★★★ (Strongest) |
| Efficiency | ★★★★★ (100%) | ★★★★☆ (70-85%) | ★★★★☆ (60-75%) |
| Maintenance | Very Low | Low | High (Ash/Wood) |
| Installation | Plug-in or Hardwire | Gas Line + Venting | Chimney Liner |
| Best Room Size | Small - Medium | Medium - Large | Large / Whole Home |
If you want serious heat, nothing beats a properly installed EPA wood insert.
The combination of high BTUs, long burn time, and radiant heat makes them unmatched for cold climates and large homes.
Gas provides strong, controllable heat with excellent efficiency and far less maintenance than wood.
It is the best balance of power and convenience.
Electric units provide consistent zone heating without venting, overheating, or safety concerns.
They are the clear winner for renters and smaller footprints.
Choose Electric if you want:
Choose Gas if you want:
Choose Wood (Inserts) if you want:
If you’d like personalized recommendations based on your room size, heating goals, and preferred style, reach out anytime:
📩 support@pureflameco.com
📞 +1-833-922-6460
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