Hekla Indoor Traditional 220 Sauna — 6 Person Indoor Sauna

Hekla Indoor Traditional 220 — Real Finnish Sauna, 6 Person

The 220 is the largest in the Hekla Indoor Traditional range — sized for six people, built for the family wellness room, the basement build-out, the garden annex that doubles as a small wellness suite. Same UK-manufactured Hekla quality (48mm thermo aspen walls, 8mm grey safety glass, Harvia heater + stones included), scaled up to a full-capacity cabin.

This is the proper investment-grade indoor sauna for households who want sauna bathing to be a shared, weekly thing — not a solo retreat. Plan the install carefully; once it's in, this is a 15-year-plus piece of household infrastructure.

Running cost + warm-up

The Harvia 9kW heater on the larger 220 volume pulls about 9 kWh peak. Run cost at 30p/kWh is typically £2.75–£3.50 per 90-minute session. Warm-up from cold to working temperature (80–90°C) takes around 40 minutes. The larger volume means heat retention between löyly throws is generous — practical when six people are getting in and out.

Why the 220 over the 210X

• Wider footprint (2,200mm vs 2,100mm) + deeper interior (2,100mm vs 2,000mm) — the 220 is a proper 6-person room, not a stretched 4-person.
• Bench layout supports L-shaped or facing-bench configuration — better for shared conversation than the linear bench of smaller models.
• Larger heat reservoir — six people opening and closing the door doesn't drop the room temperature as quickly as a smaller cabin would.

What makes Hekla Traditional different

• 48mm thermo aspen wood walls — aspen has the lowest thermal conductivity of any common sauna wood. The benches stay comfortable to sit on even at 90°C. Thermo treatment makes the wood dimensionally stable and resistant to warping over years of heat cycles.
• 8mm grey safety glass on the door and window — proper safety spec, tempered for thermal shock.
• Harvia 9kW heater with Xenio digital control — Harvia is the gold standard in every UK Finnish sauna review. Stones included.
• Chromotherapy LED lights + bluetooth sound system built in.
• Built-in non-slip vinyl floor grid.
• Choice of two finishes — Nero (dark, modern) or Scandi (lighter wood tone).

What's included

Cabin (48mm thermo aspen), 8mm grey safety glass door + window, Harvia 9kW electric heater, Harvia stones, Xenio digital control unit, chromotherapy LED lights, bluetooth audio, ventilation valve, non-slip vinyl floor grid, instructions. Comes with UK warranty.

Delivery & site preparation

• Standard delivery: Free standard UK delivery is included.
• Site: Indoor saunas need a level floor with clear access from front door to final placement. The 220 needs proper floor space — measure 2,200 × 2,100mm plus working clearance for assembly.
• Electrical: The Harvia 9kW heater needs a dedicated 40-amp single-phase circuit connected by a qualified electrician before first use.
• Ventilation: Sauna ventilation valve included; ambient room ventilation strongly recommended given the larger humidity output of a 6-person cabin.
• Installation: Cabin assembly available — typically a full day for a 2-person team given the larger panel sizes.

Specifications

• Capacity: 6 person
• Use: Indoor only
• Dimensions (W × D × H): 2,200 × 2,100 × 2,100 mm
• Sauna volume: ~10 m³
• Wall thickness: 48mm thermo aspen wood
• Door + window: 8mm grey safety glass
• Heater: Harvia 9kW electric, Xenio control, stones included
• Power supply: 40A dedicated single-phase circuit
• Lighting: Chromotherapy LED
• Audio: Built-in bluetooth sound system
• Colour options: Nero or Scandi
• Warranty: Comes with UK warranty
• Brand: Hekla (Superior Wellness, UK)

💡 UK Sauna Buying Guide | Infrared vs Traditional comparison

Want a smaller indoor traditional? See the 210 (3-4 person) or 210X (4-5 person). Looking for outdoor instead? See Outdoor Barrel or Outdoor Cube Saunas.