The Arch - 2 Person Traditional Outdoor Sauna

Small Footprint. Big Impact.

The Arch brings proper sauna heat to your garden without taking over the place.

Designed for one or two people, it combines a compact 2.8m³ interior with substantial 45mm Thermowood walls, elevated alder-wood seating and an included 6kW black Harvia heater.

The curved profile gives the Arch its distinctive character, while black Katepal roofing and tinted glass add a clean, contemporary finish. It is a traditional outdoor sauna that feels considered rather than cumbersome.

Use it after training, pair it with a cold plunge or step inside whenever you need some uninterrupted time to yourself.

Proper Sauna Heat

The Arch includes a powerful 6kW black Harvia electric heater, selected to deliver the high temperatures expected from a traditional sauna.

As the cabin and sauna stones heat up, they create the deep, enveloping warmth that distinguishes traditional sauna bathing from infrared. Carefully adding water to suitable heated stones produces a burst of steam, allowing you to adjust the humidity and intensity of your session.

Straightforward, dependable and made by one of the best-known names in sauna heating, the Harvia heater sits naturally within the Arch’s dark, understated interior.

Compact Enough for most Gardens

Measuring 167cm wide and 120cm deep, the Arch offers a comfortable two-person sauna experience without demanding an enormous outdoor area.

The 2.8m³ cabin makes effective use of the available space. Two people can sit comfortably together, while solo users have room to settle in without heating a largely empty cabin.

Its footprint makes the Arch a practical option for patios, smaller gardens and dedicated home wellness spaces.

Built from 45mm Thermowood

The Arch is constructed from 45mm Thermowood, chosen for its stability, durability and suitability for outdoor sauna construction.

Thermowood is modified using controlled heat and steam. This reduces its tendency to absorb moisture and improves dimensional stability as outdoor conditions change.

The substantial timber walls also help retain heat within the cabin. Natural wood on the sides is balanced by a dark front frame and black curved roof, creating a design that works equally well in contemporary and traditional gardens.

Elevated Alder-Wood Benching

Heat naturally rises inside a traditional sauna. The Arch’s elevated bench places you within the warmer part of the cabin, helping you experience the heat more fully.

Alder wood provides a smooth, comfortable surface and is well suited to high-temperature sauna environments. The bench offers space for two people to sit together or for one person to enjoy the cabin alone.

Traditional Ventilation

Good airflow matters in a traditional sauna.

The Arch uses a dual-ventilation arrangement to promote bottom-to-top circulation. Fresh air enters lower in the cabin while warm, moisture-laden air can leave above, supporting a more balanced and comfortable environment.

Privacy Without Feeling Enclosed

The tinted tempered-glass door gives the Arch greater privacy than standard clear glazing while still allowing natural light into the cabin.

It prevents the compact interior from feeling closed in and complements the sauna’s black frame and roofing. Tempered construction provides the strength and heat resistance required for sauna use.

Built for Outdoor Living

The curved cabin is protected by black Katepal roofing, providing a durable, weather-resistant outer layer and giving the Arch its recognisable profile.

Together with the Thermowood shell and 45mm walls, it creates a robust outdoor sauna designed for regular use throughout the seasons when correctly installed and maintained.

The sauna must be assembled on a firm, flat and suitably load-bearing base, with sufficient access and clearance for installation and future maintenance.

Why Traditional Sauna?

A traditional sauna heats the air, stones and timber around you, creating a more intense environment than a typical infrared sauna.

The high temperature encourages perspiration and produces the unmistakable enveloping warmth associated with Finnish-style sauna bathing. Adding water to suitable heated stones creates short bursts of steam, giving you direct control over how the session feels.

It is simple, physical and pleasantly free from distractions.

Why Choose the Arch?

• Designed for up to two people

• Compact 167 × 120cm footprint

• Powerful 6kW black Harvia heater included

• 45mm Thermowood wall construction

• Elevated alder-wood benching

• Traditional bottom-to-top ventilation

• Tinted tempered-glass door

• Black weather-resistant roofing

• Suitable for solo and shared sauna sessions