saunacalc

Your sauna behaves like 13 m³ — bigger than its floor plan.

That's the number every answer below is built on. Wall material and glass area scale up the heat load — log keeps it close to the room size, concrete pushes it bigger, glass adds 1.2 m³ per m².

EFFECTIVE M³
— m³
vs. {room_volume} m³ floor plan · panel walls + 1.4 m² glass
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Compare sauna items

Compare — heaters
42 heaters · empirical stone-mass tiers · kW · EU/US stock
20 models outside your room size
Sort:
Tier:
Room size:
Market:
Availability:
EOS Mythos S35 9 kW
EOSEOS Mythos S35 9 kW9 kW · 35 kg stones · 10–14 m³
Standard flat-box · $8,774
View at retailer ↗
Finlandia FLB-80 8 kW
FINLANDIAFinlandia FLB-80 8 kW8 kW · 20.41 kg stones · 7.08–12.03 m³
Standard flat-box · $1,003In stock
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Harvia Cilindro PC90 9 kW
HARVIAHarvia Cilindro PC90 9 kW9 kW · 90.7 kg stones · 8–14 m³
Designer / convection · $1,625In stock
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Harvia KIP80B 8 kW
HARVIAHarvia KIP80B 8 kW8 kW · 20 kg stones · 7.1–12 m³
Standard flat-box · $1,258In stock
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Harvia Topclass KV80E 8 kW
HARVIAHarvia Topclass KV80E 8 kW8 kW · 20.4 kg stones · 7.1–12 m³
Standard flat-box · $1,425
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Harvia Virta Combi HL9S 9 kW
HARVIAHarvia Virta Combi HL9S 9 kW9 kW · 61.2 kg stones · 7.9–13.9 m³
Designer / convection · $2,956In stock
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Compare — stones
20 stone types · olivine, diabase, ceramic · löyly + decorative
Use:
Cost:
Agate (decorative)
DECORATIVE ONLYAgate (decorative)80–200 mm · decorative
Premium
Basalt
NATURAL LOYLYBasalt50–100 mm · löyly-rated
Budget
Cast-iron sauna stones
METALCast-iron sauna stones40–80 mm · löyly-rated
Premium
Ceramic convection spheres
CERAMIC ENGINEEREDCeramic convection spheres30–60 mm · löyly-rated
Premium
Diabase (plain, non-olivine)
NATURAL LOYLYDiabase (plain, non-olivine)50–100 mm · löyly-rated
Mid
Engineered ceramic blocks
CERAMIC ENGINEEREDEngineered ceramic blocks40–80 mm · löyly-rated
Premium
Compare — paneling materials & profiles
21 options · aspen / spruce / cedar / thermo-wood · species + T&G profiles
Type:
Cost:
Market:
Accoya (paneling)
PANELINGAccoya (paneling)Pinus radiata (acetylated) · 15×95 mm
Luxury · Specialty
Aspen (paneling, untreated)
PANELINGAspen (paneling, untreated)Populus tremula · 15×95 mm
Mid · Common
Coast redwood (paneling)
PANELINGCoast redwood (paneling)Sequoia sempervirens · 15×95 mm
Luxury · Specialty
Eastern white cedar (paneling)
PANELINGEastern white cedar (paneling)Thuja occidentalis · 15×95 mm
Premium · Specialty
HPL paneling (high-pressure laminate)
PANELINGHPL paneling (high-pressure laminate)6×1300 mm
Premium · Specialty
PANEL PROFILENordic White Aspen 1×4 T&G1x4 · aspen · clear
US/CA

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We’ll keep your room spec (this 13.3 m³ effective panel-walled room with 8 kW electric heater + L-bench layout) and your ZIP. When we sign a vetted installer in your area, we’ll let you know once. No spam, no resell, no further use of your email. Anonymous-only otherwise.

Your spec carries all the dimensions, materials, heater type, and bench layout above. We won’t share with installers until you confirm at sign-up time. Privacy + retention per /privacy/.