- Choose traditional Finnish if you want the authentic high-heat, steam-capable experience, have the electrical infrastructure, and prioritise the full sensory and social experience of sauna
- Choose infrared if you want lower installation complexity, lower running costs, faster heat-up, and a gentler lower-temperature experience — particularly suited for health-focused daily users
- The right answer depends on your priorities — this guide walks through every relevant factor
The Core Difference
The fundamental distinction is how heat reaches your body. In a traditional Finnish sauna, an electric heater (or wood-fired kiuas) heats rocks to 400–600°C. These rocks radiate heat into the room air, which reaches 70–100°C. Your body heats through convection (hot air) and conduction (contact with hot surfaces). Pouring water on the rocks creates steam (löyly) that briefly increases perceived heat and humidity.
In an infrared sauna, panels emit far-infrared radiation — electromagnetic waves that are absorbed directly by the body without heating the surrounding air significantly. The cabin air sits at 45–65°C, but your core temperature rises through the radiation absorbed. The mechanism is different; the physiological outcome (raised core temperature, sweating, cardiovascular response) is similar but not identical.
☀️ Infrared Sauna
- Air temperature: 45–65°C
- Heat-up time: 10–15 minutes
- Session length: 30–45 min typical
- Steam: Not possible
- Electrical: 15–20A (standard)
- Running cost: $20–$40/month
- Install complexity: Low
- Switchboard upgrade: Rarely needed
- Kit options: Extensive
- Best for: Daily users, gentler heat
🪨 Traditional Finnish Sauna
- Air temperature: 70–100°C
- Heat-up time: 20–45 minutes
- Session length: 10–20 min per round
- Steam: Yes (löyly)
- Electrical: 32–60A dedicated
- Running cost: $40–$70/month
- Install complexity: Medium–High
- Switchboard upgrade: Often needed
- Kit and custom options available
- Best for: Authentic experience, social use
Health Benefits: What the Research Actually Shows
Both types have genuine health benefit evidence, though the research base is not equal. Traditional Finnish sauna has a substantial population-level evidence base — particularly from Finnish cohort studies tracking tens of thousands of people over decades. Infrared sauna has a smaller but growing body of clinical research.
Cardiovascular benefits
The strongest evidence is for traditional sauna. A landmark 2018 study in JAMA Internal Medicine found that men using traditional sauna 4–7 times per week had a 50% lower risk of fatal cardiovascular events compared to once-weekly users. Infrared sauna has shown benefits in smaller studies — improved endothelial function, reduced blood pressure — but lacks the decades-long population-level data of traditional.
Exercise recovery
Both types show benefit for post-exercise recovery through heat-induced increases in blood flow and growth hormone response. Traditional sauna at 80°C produces a more intense acute stress response; infrared at 55°C may allow longer sessions better tolerated by some users. Most sports medicine practitioners who use heat therapy use traditional, but infrared is gaining traction particularly for recovery clinics.
Sleep and stress
Both types show benefit for sleep quality and stress reduction through parasympathetic nervous system activation during the cooling phase after a session. Evening sauna use — particularly 1–2 hours before bed — is associated with improved sleep onset. The mechanism (core temperature drop after heating) works with both types.
Detoxification claims
Both types are marketed with "detoxification" claims. The honest evidence: saunas do increase excretion of some heavy metals and persistent organic pollutants through sweat — measurably. Claims about routine "toxin removal" are significantly overstated in marketing but have some scientific basis. Neither type has clear superiority on this dimension.
The Experience: What It Actually Feels Like
This is where the types diverge most meaningfully for many users, and where personal preference matters most.
Traditional Finnish sauna is intense, social, and sensory. The high heat (80–100°C) demands presence — you cannot ignore it. Pouring water on rocks (löyly) creates a wave of steam that briefly intensifies the perceived heat and is deeply satisfying to experienced sauna users. The traditional protocol of multiple rounds with cold plunges or showers between is a ritual as much as a health practice. Many users describe it as meditative — the heat forces you out of your head.
Infrared sauna is gentler and more accessible. The lower temperature allows users to read, use their phone, or do light activity during a session. The longer session time (30–45 minutes vs 10–20 for traditional) suits some users better. Many infrared users report significant sweating at temperatures that don't feel overwhelming. The experience lacks the steam option and the acute intensity of traditional — for some, this is a positive; for traditional enthusiasts, it feels incomplete.
An increasing number of Australian homeowners build both — a traditional sauna for the full experience and an infrared cabinet in a second location (spare room, master bathroom) for convenient daily low-effort use. If budget allows, this combination optimises for both depth of experience and daily accessibility.
Electrical and Installation: The Practical Reality
This is where traditional sauna creates significantly more complexity and cost for many Australian homes.
| Factor | Infrared | Traditional Finnish |
|---|---|---|
| Power requirement | 15–20A (standard or dedicated) | 32–60A dedicated |
| Switchboard upgrade | Rarely needed | Often needed |
| Electrical cost (install) | $300–$1,500 | $1,200–$3,500 |
| Warm-up time | 10–15 min | 20–45 min |
| Electricity per session | ~$0.30–$0.80 | ~$1.00–$2.50 |
| Ventilation requirement | Recommended | Essential (safety) |
Cost Comparison
| Setup | Infrared Total Installed | Traditional Total Installed |
|---|---|---|
| 2-person, indoor | $2,500–$5,500 | $6,000–$10,000 |
| 3–4 person, indoor | $5,000–$9,000 | $8,000–$14,000 |
| Outdoor (kit) | $6,000–$11,000 | $9,000–$17,000 |
| Custom outdoor build | $10,000–$18,000 | $14,000–$28,000 |
Who Should Choose Which?
☀️ Choose Infrared if...
- Your home has an older switchboard with limited capacity
- You want heat available with 15 minutes' notice
- You use it solo, daily, for health and recovery
- You prefer a gentler experience at lower temperatures
- Budget is under $8,000 fully installed
- You have limited space (infrared tends to be more compact)
- You're installing in a spare room without major works
🪨 Choose Traditional Finnish if...
- You want the authentic high-heat, steam-capable experience
- Sauna is a social activity — multiple users, ritual use
- You're building an outdoor wellness space
- You plan to pair with cold plunge (contrast therapy)
- You have or are willing to upgrade electrical infrastructure
- Long-term health outcomes are the primary motivation
- Aesthetic and experience quality is the priority
No — the two types use fundamentally different structures and heating systems. An infrared cabinet cannot be retrofitted with a traditional heater. If you think you'll want to upgrade to traditional eventually, it's generally better to install traditional from the start or plan for a second build.
Full-spectrum infrared units emit near, mid, and far infrared waves — compared to far-infrared-only in standard units. Some research suggests near-infrared has additional skin and cellular benefits. Full-spectrum units typically cost $2,000–$4,000 more. The evidence for meaningful additional benefit is present but not conclusive. If budget allows and health optimisation is important to you, it's a reasonable consideration — but not essential.
No. A steam room (or steam bath) operates at 100% humidity at around 40–50°C — the opposite of a traditional sauna's low humidity and high heat. The experience and health profile are different. Traditional sauna uses dry or low-humidity heat with occasional steam; a steam room is constant saturation at lower temperature. They're complementary, not interchangeable. See our sauna vs steam room guide for full comparison.