Modular Sauna Kalle L

Small-group sauna with black exterior

Price

£12,595 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 roof shingles

Terracotta

Umber

Forest

Graphite

Onyx

Choose your sauna heater

Buy together
Modular Outdoor Sauna Kalle L — 6–7 Person Painted Spruce Insulated Sauna, Factory-Built, 7.6m²
Modular Sauna LED Light Strips — Bench Lighting Kit, 1 Room

Choose your add-ons

About

More room, same straightforward build. Kalle L scales the modular format up to 7.6m², giving a small group genuine space without the longer installation a log built cabin of similar size would demand. Solid Spruce sections arrive pre assembled and fit together quickly on site. Heat retention stays strong despite the larger footprint. A practical route to proper group sauna use. The Spruce structure is supplied with its exterior factory-finished in painted black.

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: 6-7 People
  • Footprint: 440 x 225 cm
  • Max Height: 250 cm
  • Floor Area: 7.6 m²
  • Wall Thickness: 180 mm
  • Material: Spruce
  • Main Door: 90 x 190 cm
  • Window: 230 x 148 cm
  • Glazing: Tempered Glass
  • Assembly: Factory assembled
  • Insulated: Yes
  • Design Note: Only factory assembled and insulated
  • 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.
A larger sauna built for small group use brings the same core physiological benefits as any other size, heat exposure raising heart rate and improving circulation in a way that mirrors light cardiovascular exercise, but the social dimension becomes more relevant at this scale. Shared sauna use with friends or family is associated with genuine social and mood benefits beyond the physical effects of heat alone, since the relaxed, screen-free environment of a sauna session naturally encourages conversation in a way that's harder to replicate in everyday settings.

The insulated modular construction means this size sauna heats reliably and holds its temperature consistently, which matters more as group size increases since more bodies entering and leaving the heat room can otherwise affect temperature stability in an uninsulated structure. Consistent, predictable heat removes a practical friction point that might otherwise discourage regular group sessions.

For households or small groups of friends building a regular sauna habit together, frequency remains the key driver of long-term benefit. Research on habitual sauna bathers consistently shows that more frequent use correlates with stronger improvements in cardiovascular markers over time, and a sauna sized comfortably for the group that actually wants to use it together, rather than one that feels cramped with more than two or three people, makes that consistent group habit considerably easier to maintain.
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 modular sauna follows the same principles as the standard Kalle, simply across more surface area. After every session, prop the door open for twenty to thirty minutes to let the heat room dry out fully, the single most effective habit for preventing mould and timber staining. Wipe benches down once cooled, and sand the interior lightly once or twice a year wherever contact is heaviest, typically bench seating given the larger group sizes this model is built to handle.

The tempered glass window needs only a standard glass cleaner and soft cloth. Check door and window seals each season; factory-built insulated sections generally hold their fit better over time than self-assembled log joints, but it's still worth a periodic check, particularly after the sauna's first full year as everything settles in.

Externally, treat the spruce exterior with a wood treatment every two to three years, adjusting for how exposed the structure is to sun and rain. Given the larger footprint, budget slightly more time for this than the standard Kalle would need. Keep the base clear of debris and standing water across the full perimeter, and confirm ground preparation is still draining properly, particularly important for a larger, heavier structure than the standard size.
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 10-12 weeks, plus 1-2 weeks dispatch time for pallet haulage. This sauna is delivered as pre-assembled wall sections rather than fully flat packed. 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 modular sauna follows the same principles as the standard Kalle, simply across more surface area. After every session, prop the door open for twenty to thirty minutes to let the heat room dry out fully, the single most effective habit for preventing mould and timber staining. Wipe benches down once cooled, and sand the interior lightly once or twice a year wherever contact is heaviest, typically bench seating given the larger group sizes this model is built to handle.

The tempered glass window needs only a standard glass cleaner and soft cloth. Check door and window seals each season; factory-built insulated sections generally hold their fit better over time than self-assembled log joints, but it's still worth a periodic check, particularly after the sauna's first full year as everything settles in.

Externally, treat the spruce exterior with a wood treatment every two to three years, adjusting for how exposed the structure is to sun and rain. Given the larger footprint, budget slightly more time for this than the standard Kalle would need. Keep the base clear of debris and standing water across the full perimeter, and confirm ground preparation is still draining properly, particularly important for a larger, heavier structure than the standard size.
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 10-12 weeks, plus 1-2 weeks dispatch time for pallet haulage. This sauna is delivered as pre-assembled wall sections rather than fully flat packed. 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.
Modular Outdoor Sauna Kalle L — Painted Black Spruce, 7.6m² — painted — angle view 1

More room, without a longer build

Modular Sauna Kalle L scales up the standard Kalle format to 7.6 square metres, giving genuine room for a small group while keeping the same pre assembled modular construction that makes installation considerably more predictable than a full panel built cabin of similar size. Solid spruce walls throughout mean the larger floor area does not come with any compromise on how well the cabin holds heat once warmed, an important consideration as size increases and there is simply more air volume to manage.

The L designation reflects a meaningful step up in scale rather than a marginal increase, with the extra space noticeable as soon as more than two people are inside and want to sit without their knees touching. Because the wall sections arrive pre built, the larger size does not translate into a proportionally longer or more complex installation, which is one of the main practical advantages of the modular approach over traditional log built construction once a cabin grows past a certain footprint.

This size suits households who know they want more than a personal sauna but do not necessarily want the scale or installation commitment of the largest log built models in the range. It is a straightforward route to a properly sized group sauna, without the multi weekend build that an equivalent log cabin would typically demand of a self assembling owner. The Spruce structure is supplied with its exterior factory-finished in painted black.
Modular Outdoor Sauna Kalle L — Painted Black Spruce, 7.6m² — painted — lifestyle
Modular Outdoor Sauna Kalle L — Painted Black Spruce, 7.6m² — painted — angle view 2
Modular Outdoor Sauna Kalle L — Painted Black Spruce, 7.6m² — painted — lifestyle
Modular Outdoor Sauna Kalle L — Painted Black Spruce, 7.6m² — painted — lifestyle
Modular Outdoor Sauna Kalle L — Painted Black Spruce, 7.6m² — painted — lifestyle
Modular Outdoor Sauna Kalle L — Painted Black Spruce, 7.6m² — lifestyle photo 1
Modular Outdoor Sauna Kalle L — Painted Black Spruce, 7.6m² — lifestyle photo 2
Modular Outdoor Sauna Kalle L — Painted Black Spruce, 7.6m² — lifestyle photo 3
Modular Outdoor Sauna Kalle L — Painted Black Spruce, 7.6m² — 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.

Chat With Us →
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
Close

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.

Become a Wellness VIP

Sign up free for early sale access and member-only discounts.

By subscribing, you agree to our Terms & Privacy Policy and consent to marketing emails.