Thinking about bringing a sauna into your home, but not sure whether to choose a classic Finnish sauna or a modern near infrared (NIR) sauna? Both will make you sweat – but they work very differently, and the practical differences in cost, space and health effects are bigger than most people expect.
How they heat you: air vs. light
A traditional Finnish sauna heats the air in an insulated cabin to 80–100 °C. Your body warms up from the outside in, through hot air and steam. A near infrared sauna works the other way round: incandescent bulbs emit radiant NIR light that penetrates up to 9 cm into your tissue and warms you from the inside out. The surrounding air stays close to room temperature – many people start sweating within minutes even in their living room. It feels like sitting by a fire, not sitting in an oven.
The light therapy difference
This is the biggest functional difference. A Finnish sauna offers heat therapy only. A NIR sauna adds the therapeutic light spectrum of 600–1000 nm, which studies connect with skin health, muscle recovery, pain relief, better sleep and more – the field known as photobiomodulation. If you want to understand the mechanism, read our guide Red Light Therapy Explained. In short: with a Finnish sauna you get one therapy, with a NIR sauna you get two at the same time.
Temperature comfort and session length
Not everyone tolerates 90 °C air well – for many people (and for those with cardiovascular limitations, always after consulting a doctor) the intense heat of a Finnish sauna is the main barrier. A NIR session is gentler: typically 20–30 minutes per side of the body at a comfortable ambient temperature, with sweating driven by radiant heat rather than extreme air temperature.
Cost, space and installation
A built-in Finnish sauna means a dedicated room, thousands of euros and professional installation, plus a powerful electrical connection. An infrared cabin is cheaper but still needs its own floor space. A portable NIR sauna panel weighs around 8 kg, hangs on a door or stands on a chair, plugs into a normal outlet and costs a fraction of a cabin. Operating costs are similarly modest – roughly 0.15 € per hour of use.
What about EMF?
Electromagnetic fields are a weak point of many FAR infrared cabins and LED panels – measurements often show hundreds of V/m, far above the 10 V/m considered safe. A well-designed incandescent NIR panel can reach practically zero EMF; our own measurements show 0 V/m electric and 0 mG magnetic field from 40 cm. See the full data in our NIR vs FAR vs LED comparison.
Where the Finnish sauna still wins
To be fair: if you love the ritual – the löyly steam, pouring water over hot stones, the social experience of a shared cabin – nothing replaces a real Finnish sauna. It is a cultural experience as much as a therapy. And if you already own one, the two combine beautifully: many of our customers hang a NIR panel inside their existing sauna cabin and get the best of both worlds.
Verdict: which one should you choose?
Choose a traditional Finnish sauna if you value the classic high-heat ritual and have the space and budget for it. Choose a near infrared sauna if you want heat therapy plus red light therapy in one, a gentler temperature, zero EMF, minimal space requirements and a much lower price. For most people starting their home-sauna journey, a NIR panel is the more practical and more versatile first step – and our FAQ answers the most common questions before you decide.