Indoor Sauna Large

Room for couples or family together

Price

£3,595 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

Natural Spruce

Choose your sauna heater

Buy together
Indoor Home Sauna Large — 3–4 Person 34mm Spruce Indoor Sauna, Aspen Benches, Floor Not Included, 2.24 × 1.75m
Integrated Bluetooth Speakers & Radio

Choose your add-ons

About

More room for sauna sessions shared together. Inside Sauna "Large" grows to 3.92m² of solid Spruce construction, the extra floor area making a real difference for households using the sauna as a couple or family rather than taking turns alone. Genuine thermal mass built for indoor installation, sauna access without stepping outside year round. Built for households with the indoor space to do it properly.

Natural Nordic Spruce

Natural Nordic Spruce

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: Rectangular
  • Accommodates: 3-4 People
  • Footprint: 224 x 175 cm
  • Max Height: 201 cm
  • Wall Thickness: 34 mm
  • Material: Spruce (34 x 96)
  • Glass Door: 68.5 x 168.7 cm
  • Window: 45.6 x 169 cm
  • Glazing: Tempered Glass
  • Weight: 375 kg
  • Package Size: 220 x 100 x 77 cm
  • Assembly: Self-assembly
  • Insulated: No
  • Design Note: Indoor use; internal 201x158x197cm; aspen benches; floor not included
  • Heater Compatibility: Electric

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.
A larger indoor sauna built for shared use brings a genuinely social dimension to a routine that's often solitary in a smaller cabin. Sauna bathing together, rather than taking turns, supports the relaxed, connected experience that's central to sauna culture across Finland and the Baltic states, and a properly sized indoor room makes that kind of shared use practical for families or couples without anyone feeling like they're waiting their turn.

The core physiological benefits remain the same regardless of room size: heat exposure raises heart rate and improves circulation in a way that mirrors light cardiovascular exercise, and consistent, regular use is what drives the most meaningful long-term cardiovascular and wellbeing improvements documented in research on habitual sauna bathers. An indoor location continues to remove the seasonal weather barrier that often limits outdoor sauna use through colder months.

For households specifically building sauna bathing into family life, having genuine room for everyone to use the space together rather than negotiating turns in a cramped single-person cabin supports a far more consistent habit. Shared, social sauna use tends to get prioritised and protected as a regular fixture in busy household schedules in a way that a solo, occasional routine often doesn't, making a properly sized shared space a genuinely practical investment in long-term consistency.
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.

Caring for this larger indoor sauna follows the same principles as the Small model, simply across more surface area. After every session, ensure ventilation is doing its job and leave the door open to let the heat room dry out fully, since indoor humidity needs proper management without the natural airflow an outdoor sauna benefits from. Wipe down the aspen benches after use and give the interior a light sand once or twice a year wherever contact is heaviest.

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

Given the larger footprint, check the surrounding room's floor and walls periodically for any signs of moisture migration, reinforcing why a properly prepared, water-resistant floor matters even more at this scale. There's no exterior timber treatment needed since the structure sits indoors, but pay attention to the room's overall ventilation and humidity control to keep both the sauna and the surrounding space in good condition over time.
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
Caring for this larger indoor sauna follows the same principles as the Small model, simply across more surface area. After every session, ensure ventilation is doing its job and leave the door open to let the heat room dry out fully, since indoor humidity needs proper management without the natural airflow an outdoor sauna benefits from. Wipe down the aspen benches after use and give the interior a light sand once or twice a year wherever contact is heaviest.

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

Given the larger footprint, check the surrounding room's floor and walls periodically for any signs of moisture migration, reinforcing why a properly prepared, water-resistant floor matters even more at this scale. There's no exterior timber treatment needed since the structure sits indoors, but pay attention to the room's overall ventilation and humidity control to keep both the sauna and the surrounding space in good condition over time.
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.
Indoor Home Sauna Large — Spruce Sauna Room for Sharing, 3.9m² No Floor — spruce — angle view 1

Room for shared indoor sauna sessions

Inside Sauna "Large" extends the indoor sauna concept to a 3.92 square metre footprint at 224 by 175 centimetres, giving genuinely more room than the Small version for households who want to use their indoor sauna regularly with more than one person at a time. Solid spruce construction throughout provides the same genuine thermal mass and durability as an outdoor sauna, simply built and finished for installation within an existing room in the main house.

The extra floor area makes a real difference to comfort, particularly for households who plan to use the sauna together rather than taking turns individually, where the gap between a tight personal space and a properly comfortable shared one becomes obvious almost immediately. As with the Small version, indoor installation means sauna access without stepping outside, valuable for year round use regardless of garden access or outdoor weather conditions on any given day.

Inside Sauna "Large" suits households with the indoor space to support a bigger installation, whether a larger bathroom, a converted utility room, or a dedicated wellness area built specifically around the sauna itself, rewarding that available space with a properly sized indoor sauna rather than a compromise scaled down to fit a smaller room than ideal. It is the version many households wish they had chosen from the outset once they realise how often more than one person wants to use it together.
Indoor Home Sauna Large — 3–4 Person 34mm Spruce Indoor Sauna, Aspen Benches, Floor Not Included, 2.24 × 1.75m
Indoor Home Sauna Large — Spruce Sauna Room for Sharing, 3.9m² No Floor — spruce — side view 1
Indoor Home Sauna Large — 3–4 Person 34mm Spruce Indoor Sauna, Aspen Benches, Floor Not Included, 2.24 × 1.75m
Indoor Home Sauna Large — Spruce Sauna Room for Sharing, 3.9m² No Floor — lifestyle photo 4

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 Naturally Insulating Spruce Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Naturally Insulating Spruce Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Naturally Insulating Spruce 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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