Botnia 81 — 8.1 kW Off-Grid Propane Sauna Heater

FinSteam

Botnia 81 — 8.1 kW Off-Grid Propane Sauna Heater

The FinSteam Botnia 81 is the original 8.1 kW propane gas sauna heater in the FinSteam range, supplied in the UK by Steam & Oak. It runs from a propane bottle with no mains electricity, no chimney and no flue, and the merchant states 70–75°C in 15–20 minutes. It is certified as a standalone gas appliance, so it can be retrofitted into an existing barrel, cube or cabin sauna that meets the FinSteam installation specification, or specified into a new build.

£1,695

Manufacturer list price

View at Steam & Oak offer: £1,695 — matches the list price · verified 9 Aug 2026 · Merchant-listed price at time of verification; configuration options R11/R14/R11S/R14S may vary in price. Price and availability are set by Steam & Oak and subject to change.

Specifications and pricing verified with the merchant · last verified 9 August 2026

View at Steam & Oak

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Specifications

Power output: 8.1 kW(Merchant published product page (Steam & Oak))
Fuel: UK propane (I3P, 37 mbar); butane/propane mix (I3P/B, 30 mbar) on request(Merchant published product page (Steam & Oak))
Gas consumption: 0.6 kg/h at full output(Merchant published product page (Steam & Oak))
Heat-up time: 15–20 minutes to 70–75°C(Merchant published product page (Steam & Oak))
Sauna size range: 4–12 m³ insulated · 4–8 m³ non-insulated(Merchant published product page (Steam & Oak))
Dimensions: 61 × 51 × 30 cm(Merchant published product page (Steam & Oak))
Weight: ~9.8 (configuration-dependent) kg(Merchant published product page (Steam & Oak))
Stone capacity: Up to 20 kg with Orbis 11 cage · 25 kg+ with Orbis 14(Merchant published product page (Steam & Oak))
Clearance to combustible timber: 200 mm sides, 1000 mm ceiling (50 mm sides with Njord shield)(Merchant published product page (Steam & Oak))
Safety systems: Oxygen depletion sensor auto shut-off and flame monitoring; EU type-examination certificate stated (AENOR, Gas Appliance Regulation 2016/426)(Merchant published product page (Steam & Oak))
Configurations: R11 (Orbis 11 cage), R14 (Orbis 14 cage), R11S (+ Njord shield + Halo rail), R14S (Orbis 14 + Njord + Halo)(Merchant published product page (Steam & Oak))
Off-grid capable: Yes — no mains electricity, chimney or flue required(Merchant published product page (Steam & Oak))
Product type: Gas sauna heater(Merchant published product page (Steam & Oak))

Supplied by

Steam & Oak

Steam & Oak is NEATLY's first integrated wellness merchant. Product, imagery and specification data is supplied or verified through the merchant's own published material. Catalogue coverage is intentionally limited until further verified data is supplied.

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