Infrared saunas draw significantly less electricity per session and warm up faster than traditional saunas, but traditional saunas distribute heat more uniformly because hot air fills the entire space, while infrared panels emit directional radiation that heats the parts of your body closest to them most intensely.
If you've been looking into saunas, you've probably noticed the price difference between infrared and traditional models. But the real difference isn't just upfront cost—it's how they use energy and how that energy reaches your body.
Let me walk through what actually happens inside each type, so you can decide which makes sense for your setup and your goals.
How each type generates heat
Traditional saunas (Finnish, steam, dry) use a heater—usually electric or wood-fired—to heat stones or a metal element. That heat warms the air inside the room to 150°F to 195°F. You sit in that hot air, and your body heats up from the outside in.
Infrared saunas use ceramic or carbon heating panels that emit infrared radiation. The panels themselves reach around 120°F to 150°F, but the air temperature stays much lower—typically 110°F to 140°F. The infrared waves penetrate your skin directly, warming your tissues without needing to heat all the air around you first.
This difference in mechanism drives everything else.
Energy efficiency: infrared wins on input
Infrared saunas use less electricity per session. A typical two-person infrared unit draws between 1,000 and 1,500 watts. A traditional electric sauna of similar size draws 4,500 to 6,000 watts.
That's a 3x to 4x difference in peak power draw.
But the real savings come from warm-up time. A traditional sauna needs 30 to 45 minutes to reach temperature. An infrared sauna is ready in 10 to 15 minutes. Over a year of regular use, that adds up. If you sauna four times per week, an infrared unit will use roughly 60 to 70 percent less electricity than a traditional one.
There is a trade-off, though. Infrared panels lose efficiency as they age. Carbon panels degrade after about 5,000 to 8,000 hours of use. Ceramic panels last longer but produce a narrower wavelength. Traditional heaters, by contrast, are simpler and tend to run reliably for decades with minimal maintenance.
Heat distribution: traditional saunas win on uniformity
This is where the two types diverge most.
In a traditional sauna, the hot air circulates. Heat rises to the ceiling, and cooler air stays near the floor. You can feel the temperature difference between the top bench and the bottom bench—that's why Finnish saunas have multiple bench heights. You move up or down to control your exposure.
The key point: the heat fills the space. Every part of your body gets roughly the same exposure regardless of where you sit, as long as you're at the same bench height.
Infrared saunas don't work that way. The panels emit directional radiation. The parts of your body closest to the panels absorb more heat. If you sit facing one panel, your front gets more exposure than your back. If you lean away from a panel, you feel a noticeable drop in intensity.
Some infrared units try to solve this by wrapping panels around the walls—front, back, sides, even under the legs. But even then, the distribution is uneven compared to a traditional sauna. You can rotate or shift position during a session to balance exposure, but it requires active management.
There's also the issue of penetration depth. Infrared wavelengths vary. Near-infrared penetrates shallowly (a few millimeters). Far-infrared penetrates deeper (up to 1.5 inches into tissue). Most consumer infrared saunas use far-infrared, but the exact wavelength depends on the panel type. Traditional saunas don't have this variable—they heat the air, and the air heats you uniformly.
What this means for your session
If your goal is the classic sauna experience—intense heat, sweat pouring, hot air hitting your lungs—traditional is the way to go. The high ambient temperature also means you can stay in for shorter sessions (10 to 15 minutes) and get a strong cardiovascular response.
If your goal is longer, lower-temperature sessions where you can read, listen to a podcast, or stretch, infrared makes practical sense. You can stay in for 30 to 45 minutes without feeling like you're baking. Some men find infrared more tolerable for joint or muscle issues because the heat penetrates without the oppressive air temperature.
Research from the University of Eastern Finland (Laukkanen et al., 2015) found that traditional sauna use—4 to 7 sessions per week—was associated with a 40 percent lower risk of cardiovascular mortality. The mechanism appears to be the cardiovascular load from high heat exposure, which mimics moderate exercise. Infrared studies are less robust, but early evidence suggests similar benefits for blood flow and vascular function, though at lower absolute temperatures.
Practical considerations for your home
Space. Traditional saunas need ventilation—either a dedicated exhaust or a window you can crack. The high heat and humidity require the room to breathe. Infrared saunas are more forgiving. Many are sold as pre-built cabins that you assemble in a spare room or basement with minimal modification.
Installation. A traditional electric sauna typically requires a dedicated 30-amp or 50-amp circuit. That means an electrician and possibly a panel upgrade. Infrared units plug into a standard 120-volt outlet in most cases. Installation cost is significantly lower.
Maintenance. Traditional saunas need periodic cleaning of the heater stones (they collect dust and crack over time) and occasional treatment of the wood. Infrared panels collect dust on the surface, which reduces efficiency—you need to wipe them down. The electronics in infrared units are more complex and more likely to fail than a simple heating element.
The bottom line
Infrared saunas use less energy, warm up faster, and cost less to install. Traditional saunas deliver more uniform heat, a stronger cardiovascular stimulus at shorter session times, and simpler long-term maintenance.
Your choice depends on what you're optimizing for. If you want the most efficient way to get heat into your body for a given amount of electricity, infrared wins. If you want the most consistent, immersive heat experience, traditional wins.
Neither is wrong. They're different tools for different priorities.
Frequently asked questions
How much electricity does an infrared sauna use compared to a traditional sauna?
A typical two-person infrared unit draws between 1,000 and 1,500 watts, while a traditional electric sauna of similar size draws 4,500 to 6,000 watts. That's a 3x to 4x difference in peak power draw. If you use a sauna four times per week, an infrared unit will use roughly 60 to 70 percent less electricity than a traditional one over a year.
How long does each type of sauna take to warm up?
A traditional sauna needs 30 to 45 minutes to reach temperature, while an infrared sauna is ready in 10 to 15 minutes. That faster warm-up time is a big part of why infrared units use less electricity overall, since you're not running a high-wattage heater for as long before your session even starts.
Do infrared saunas heat your body as evenly as traditional saunas?
No. Traditional saunas heat the air, and that air fills the whole space so every part of your body gets roughly the same exposure at a given bench height. Infrared panels emit directional radiation, meaning the parts of your body closest to the panels absorb more heat, and you'll notice a drop in intensity if you lean away from a panel.
Which type of sauna is easier to install at home?
Infrared saunas are generally easier to install because most units plug into a standard 120-volt outlet and many come as pre-built cabins you can assemble in a spare room with minimal modification. Traditional electric saunas typically require a dedicated 30-amp or 50-amp circuit, which usually means hiring an electrician and potentially upgrading your electrical panel.