Hiki L Patio Sauna Thermo

Relaxed room for three, small footprint

Price

£8,395 inc VAT & Delivery Included

Complete DIY Assembly Kit

Every Order Plants 5 Trees

Professional Installation

Comprehensive Warranty

Free UK Mainland Delivery

Choose your installation

Choose your timber colour

Thermo Spruce

Obsidian

Midnight

Silver

Arctic

Walnut

Crimson

Larch

Olive

Choose your roof shingles

Terracotta

Umber

Forest

Graphite

Onyx

Choose your sauna heater

Choose your roof insulation

Buy together
Patio Sauna Hiki L — 2–3 Person 40mm Thermowood Garden Sauna, Glass Door & Window Panel, 3.1m²
Integrated Bluetooth Speakers & Radio

Choose your add-ons

About

A step up in space without a step up in footprint. The Hiki "L" gives three people proper room in a 3.1m² square Thermowood cabin, the heat treated timber resisting moisture and warping through every British season. Solid log walls hold heat efficiently, keeping running costs sensible. Self assembly follows the same simple panel system as the rest of the Hiki range. A natural next step from a single person sauna.

Heat Treated Thermowood

Heat Treated Thermowood

Built for UK Weather

Built for UK Weather

Everything You Need to Install

Everything You Need to Install

Designed for Fast Heat-Up

Designed for Fast Heat-Up

Specification

  • Shape: Square
  • Accommodates: 2-3 People
  • Footprint: 229 x 229 cm
  • Max Height: 235 cm
  • Floor Area: 3.1 m²
  • Wall Thickness: 40 mm
  • Material: Thermowood
  • Glass Door: 70 x 190 cm
  • Window: 90 x 190 cm
  • Assembly: Self-assembly
  • Insulated: No
  • Design Note: Glass door and window panel
  • Power Supply: Single or Three Phase
  • Heater Compatibility: Electric & Wood-Fired

Designed around your ritual

Full Glass Back Window

Full Glass Back Window

Bring the outdoors in. A full glass rear window fills the sauna with natural light and opens up wider scenic views.
Half Moon Back Window

Half Moon Back Window

Privacy meets natural light. A half-moon rear window creates a softer, brighter feel while keeping more enclosed wall space.
Full Glass Front Barrel

Full Glass Front Barrel

Turn every session outward. Full front glazing opens the barrel sauna to natural light and uninterrupted outdoor views.
Full Glass Front Cube

Full Glass Front Cube

Modern design, open views. Full-height front glazing creates a brighter, cleaner space with a sharper architectural finish.
LED Lighting Kits

LED Lighting Kits

Set the perfect mood. Integrated LED lighting creates warmth and atmosphere, transforming the sauna experience day or night
Bluetooth Speakers

Bluetooth Speakers

Soundtrack your downtime. Built-in Bluetooth speakers bring music, podcasts, and guided sessions straight into your sauna.
Quality Accessories

Quality Accessories

Complete the experience properly. Practical finishing touches that improve comfort, convenience, and the overall sauna ritual.
Premium Thermowood

Premium Thermowood

Built to age beautifully. Thermowood offers a richer finish, stronger durability, and better long-term performance.
Finding genuinely more room without committing to a significantly larger structure suits households who want a meaningful step up in comfort over the most compact options, without the cost and footprint of a multiroom log sauna. The core physiological benefits of sauna bathing, improved circulation, reduced muscle tension, a cardiovascular effect comparable to light exercise, remain identical regardless of which specific size within a manageable range a household chooses.

For couples specifically, having relaxed room for both people to use the sauna together comfortably, rather than perching in a tighter single-person space, supports the social and connected aspect of sauna bathing that many find adds genuine value beyond the physical heat itself. A properly balanced square footprint at this size avoids feeling cramped while still remaining genuinely manageable for most typical UK gardens.

Thermowood's durability ensures this modest size increase doesn't come at the cost of long-term reliability, with the same heat treatment process delivering strong weather resistance regardless of overall cabin scale. For households building a wider garden wellness routine around their sauna, season after season, this kind of considered, appropriately sized choice tends to support consistent, comfortable use without the larger commitment a bigger multiroom build would represent.
Delivered flat-packed for self-assembly, with free UK mainland delivery on qualifying orders. The larger Cube format requires a little more assembly time than the smaller Icon models, so we recommend allowing a weekend and having a second person to help. A solid, level base and suitable delivery access are required.

For a complete setup, select Professional Installation and choose your preferred date, allowing for the stated production lead time. We’ll then arrange the installation around your requirements, including any additional preparation or works needed to accommodate your sauna where possible.

Electric sauna heaters require a suitable dedicated electrical supply and are not simply plug-and-play. The power requirements depend on the heater's output and the electrical supply available at the property.

Smaller heaters may be suitable for a 230V single-phase supply, while larger or more powerful heaters can require a 400V three-phase supply. Single-phase power uses one electrical phase, whereas three-phase power distributes the load across three phases and is better suited to higher-powered equipment.

The correct supply will depend on the specific heater you choose, so the heater's electrical requirements should always be checked before installation.

Sauna heaters will normally need to be hard-wired into a correctly rated dedicated circuit with the appropriate cable, isolation and electrical protection. They should not be connected using a standard household plug or extension lead.

The final electrical connection should be completed by a suitably qualified electrician in accordance with the heater manufacturer's instructions and applicable electrical regulations. This is important for both safety and reliable operation of the heater.

If you're based in the Leicestershire area, we can arrange the electrical installation of your sauna heater for an additional fee. Please speak to our team if you'd like this included with your sauna.

Wood-fired sauna heaters do not require an electrical supply for heating, but they do require the correct installation of the stove, chimney, flue and surrounding heat protection.

The stove must be positioned according to the manufacturer's required safety distances from timber walls, benches and other combustible materials. Depending on the stove and sauna design, suitable heat shields or other non-combustible protection may also be required.

The floor beneath and immediately around the stove may also require suitable non-combustible protection, particularly where there is a risk of embers or hot material falling from the stove.

A suitable chimney and flue system must be installed to safely carry smoke and combustion gases outside the sauna. Where the flue passes through the roof, the correct insulated chimney components, roof flashing and heat-resistant protection should be used.

Correct ventilation is also important. A wood-fired stove requires an adequate supply of combustion air, while the sauna itself needs sufficient airflow to provide fresh air, circulate heat and allow moisture to escape.

When choosing the position of an outdoor wood-fired sauna, you should also consider where the chimney will discharge in relation to your house, neighbouring properties, windows, boundaries and outdoor seating areas.

Any applicable local requirements should be checked before installation, particularly where chimney positioning, smoke control or other restrictions may apply.

The Hiki L needs the same straightforward Thermowood care as the smaller Hiki S, simply across a somewhat larger interior. After every session, leave the door open for twenty to thirty minutes to let the heat room dry out fully, preventing mould and dark staining on timber surfaces. Wipe down the interior once cooled, and give it a light sand once or twice a year wherever hands and bare skin make the most contact.

The glass door and larger window need only a standard glass cleaner and soft cloth. Leave the interior timber unsealed, allowing it to breathe and absorb moisture properly during sessions.

Thermowood's natural weather resistance keeps exterior maintenance minimal compared with standard Spruce, needing little beyond occasional checks for surface wear. A light oil treatment every couple of years maintains the original colour if preferred, or allow natural weathering to a silvery grey, which requires no upkeep at all.
This sauna comes with a 5 year warranty for residential use and 2 years for commercial use, covering structural timber, glazing, and hardware. Valid claims are assessed case by case, and we'll supply replacement parts wherever possible rather than the whole sauna.
Production takes 7-10 weeks, plus 1-2 weeks dispatch time for pallet haulage. This sauna is delivered flat packed unless otherwise stated. Free UK mainland shipping applies to orders over £500 covering up to one double pallet (2.4m x 1.2m x 2.2m) or two single pallets (1.2m x 1.2m x 2.2m). If your order exceeds this due to length, weight, or quantity, additional pallet charges may apply and are quoted separately based on postcode. Please have a solid base, clear access, and suitable unloading space ready before delivery, with help on site if needed. Pallet deliveries are kerbside only, and you're responsible for moving goods onto your property.
Health Benefits
Assembly & Installation
Delivered flat-packed for self-assembly, with free UK mainland delivery on qualifying orders. The larger Cube format requires a little more assembly time than the smaller Icon models, so we recommend allowing a weekend and having a second person to help. A solid, level base and suitable delivery access are required.

For a complete setup, select Professional Installation and choose your preferred date, allowing for the stated production lead time. We’ll then arrange the installation around your requirements, including any additional preparation or works needed to accommodate your sauna where possible.
Electric Heater Setup

Electric sauna heaters require a suitable dedicated electrical supply and are not simply plug-and-play. The power requirements depend on the heater's output and the electrical supply available at the property.

Smaller heaters may be suitable for a 230V single-phase supply, while larger or more powerful heaters can require a 400V three-phase supply. Single-phase power uses one electrical phase, whereas three-phase power distributes the load across three phases and is better suited to higher-powered equipment.

The correct supply will depend on the specific heater you choose, so the heater's electrical requirements should always be checked before installation.

Sauna heaters will normally need to be hard-wired into a correctly rated dedicated circuit with the appropriate cable, isolation and electrical protection. They should not be connected using a standard household plug or extension lead.

The final electrical connection should be completed by a suitably qualified electrician in accordance with the heater manufacturer's instructions and applicable electrical regulations. This is important for both safety and reliable operation of the heater.

If you're based in the Leicestershire area, we can arrange the electrical installation of your sauna heater for an additional fee. Please speak to our team if you'd like this included with your sauna.

Wood-Fired Heater Setup

Wood-fired sauna heaters do not require an electrical supply for heating, but they do require the correct installation of the stove, chimney, flue and surrounding heat protection.

The stove must be positioned according to the manufacturer's required safety distances from timber walls, benches and other combustible materials. Depending on the stove and sauna design, suitable heat shields or other non-combustible protection may also be required.

The floor beneath and immediately around the stove may also require suitable non-combustible protection, particularly where there is a risk of embers or hot material falling from the stove.

A suitable chimney and flue system must be installed to safely carry smoke and combustion gases outside the sauna. Where the flue passes through the roof, the correct insulated chimney components, roof flashing and heat-resistant protection should be used.

Correct ventilation is also important. A wood-fired stove requires an adequate supply of combustion air, while the sauna itself needs sufficient airflow to provide fresh air, circulate heat and allow moisture to escape.

When choosing the position of an outdoor wood-fired sauna, you should also consider where the chimney will discharge in relation to your house, neighbouring properties, windows, boundaries and outdoor seating areas.

Any applicable local requirements should be checked before installation, particularly where chimney positioning, smoke control or other restrictions may apply.

Cleaning & Care
The Hiki L needs the same straightforward Thermowood care as the smaller Hiki S, simply across a somewhat larger interior. After every session, leave the door open for twenty to thirty minutes to let the heat room dry out fully, preventing mould and dark staining on timber surfaces. Wipe down the interior once cooled, and give it a light sand once or twice a year wherever hands and bare skin make the most contact.

The glass door and larger window need only a standard glass cleaner and soft cloth. Leave the interior timber unsealed, allowing it to breathe and absorb moisture properly during sessions.

Thermowood's natural weather resistance keeps exterior maintenance minimal compared with standard Spruce, needing little beyond occasional checks for surface wear. A light oil treatment every couple of years maintains the original colour if preferred, or allow natural weathering to a silvery grey, which requires no upkeep at all.
Warranty
This sauna comes with a 5 year warranty for residential use and 2 years for commercial use, covering structural timber, glazing, and hardware. Valid claims are assessed case by case, and we'll supply replacement parts wherever possible rather than the whole sauna.
Delivery
Production takes 7-10 weeks, plus 1-2 weeks dispatch time for pallet haulage. This sauna is delivered flat packed unless otherwise stated. Free UK mainland shipping applies to orders over £500 covering up to one double pallet (2.4m x 1.2m x 2.2m) or two single pallets (1.2m x 1.2m x 2.2m). If your order exceeds this due to length, weight, or quantity, additional pallet charges may apply and are quoted separately based on postcode. Please have a solid base, clear access, and suitable unloading space ready before delivery, with help on site if needed. Pallet deliveries are kerbside only, and you're responsible for moving goods onto your property.
Patio Sauna Hiki L — 3 Person Thermowood Log Sauna, 3.1m² — thermowood — angle view 1

Genuinely more room, not a bigger commitment

The Hiki "L" takes the same thermally modified timber construction as its smaller sibling and scales it up to a 3.1 square metre square footprint, giving three people enough room to sit and properly relax rather than squeeze in. Thermowood is produced by heating spruce at high temperature without chemicals, which changes the wood's cell structure so it resists moisture and warping far better than untreated timber, an important quality through a British winter.

The square layout makes better use of the available floor space than a narrow rectangular cabin of the same area, so the bench arrangement feels generous rather than tight, with enough room to lie back rather than simply sit upright. Log built walls rather than a thin panel and frame system mean the cabin holds heat more efficiently once warmed, so it costs less to run and reaches temperature reliably even on cold evenings. Self assembly follows the same numbered panel system used across the Hiki range, with no specialist tools required beyond a basic kit and a free weekend.

This is the size most people land on when a single person sauna starts to feel too small but a full multiroom build feels like more commitment than they want to take on straight away. It works well as a standalone garden feature or as a starting point that can later sit alongside a cold tub for a proper contrast therapy setup, the kind of pairing that turns occasional sauna use into a genuine weekly habit.
Patio Sauna Hiki L — 3 Person Thermowood Log Sauna, 3.1m² — lifestyle photo 2
Patio Sauna Hiki L — 3 Person Thermowood Log Sauna, 3.1m² — thermowood — front view 1
Patio Sauna Hiki L — 3 Person Thermowood Log Sauna, 3.1m² — thermowood — side view 1
Patio Sauna Hiki L — 3 Person Thermowood Log Sauna, 3.1m² — thermowood — side view 3
Patio Sauna Hiki L — 3 Person Thermowood Log Sauna, 3.1m² — thermowood — back view 1
Patio Sauna Hiki L — 3 Person Thermowood Log Sauna, 3.1m² — thermowood — side view 2
Patio Sauna Hiki L — 3 Person Thermowood Log Sauna, 3.1m² — thermowood — side view 4
Patio Sauna Hiki L — 3 Person Thermowood Log Sauna, 3.1m² — lifestyle photo 1

From Your Sketch
To Reality ✏️

A sauna built entirely around your space, your ideas and how you want it to feel.

Send us your hand-drawn sketches, and we’ll turn them into detailed CAD designs ready to bring your vision to life.

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Bespoke wood-fired sauna and wellness space
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
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Built on Tradition. Perfected for Today.

Classic Scandinavian design, refined with premium materials, precise craftsmanship and enduring performance.

Designed to Heat Efficiently

Every curve has a purpose, helping your sauna reach temperature faster while delivering an even, enveloping warmth.

Crafted from Exceptional Thermowood

Heat-treated for durability and stability, our premium timber is chosen for its natural beauty and long-lasting performance.

Premium Tempered Safety Glass

Our premium tempered glazing delivers a refined finish, excellent durability and complete confidence in every sauna.

Frequently Asked Questions

5-Year Guarantee

5-Year Guarantee

Built for years of wellness and relaxation

Free UK Mainland Delivery

Free UK Mainland Delivery

Free delivery throughout England, Wales, and Scotland.

Expert Help, When You Need It

Expert Help, When You Need It

Friendly specialist support before and after your purchase.

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