Leil Celto M 3 Person Outdoor Traditional Finnish Sauna

Leil Celto M 3 Person Outdoor Traditional Finnish Sauna - NW Immersion
$5,990.00 $6,990.00 SAVE $1,000.00
SKU: LEI-CeltoM By Leil
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More Room to Make Wellness Your Own.

The Leil Celto M brings authentic Finnish sauna bathing into a beautifully considered backyard retreat. Designed for up to three people, it offers additional room for couples, shared sessions, or quiet time to yourself. Clean Nordic lines and generous bronze glass create an inviting space that feels connected to your surroundings—a place to slow down, settle into the warmth, and make wellness part of everyday life.

Built from substantial 2.4-inch-thick Nordic spruce cross-laminated timber panels, the Celto M combines solid construction with insulation that helps retain heat. Inside, two-level aspen benches and a wide backrest bring natural warmth and comfortable seating to your daily ritual. Optional LED lighting beneath the backrest adds a soft glow for relaxing evening sessions.

Large prefabricated panels simplify assembly, making your home sauna retreat easier to bring to life. Choose a compatible electric heater package and the accessories that suit your routine, then finish the natural spruce exterior to complement your outdoor space.

From peaceful mornings to unhurried evenings together, the Celto M creates room for a ritual you’ll look forward to returning to.

✓ Seats Up to 3 People
✓ Authentic Finnish Dry & Steam Sauna Experience
✓ Substantial 2.4″ Nordic Spruce CLT Construction
✓ Two-Level Aspen Benches & Wide Backrest
✓ Bronze Tempered Glass Panels & Door
✓ Approximately 4–6 Hour Assembly
✓ Optional Interior LED Lighting

Exterior finishing required: Your Celto M arrives unstained in natural spruce. The exterior must be treated with a suitable exterior varnish containing UV protection.

Create a wellness retreat tailored to your home with carefully selected heater packages, lighting, and accessories.

Interior LED Lighting for Backrest

Add a warm, inviting glow to your Celto M with interior LED lighting that enhances the atmosphere for relaxing evening sauna sessions.

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Sauna Heater Packages

Hand-selected heater packages designed specifically for the Celto Saunas, delivering exceptional performance, efficiency, and the authentic Nordic sauna experience Leil saunas are known for.

Not sure which heater size? Check with our calculator

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HUUM UKU Glass Control Surface-Mount Frame

Choosing a HUUM DROP heater package? Be sure to include this surface-mount frame for the UKU Glass control. It allows the control to mount neatly on the wall for a clean, finished look and simple installation.

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Leil Heater Stand — Required with Heater Purchase

Adding a heater package to your Celto Sauna? You must also include the Leil Heater Stand, which provides the mounting support needed to install your selected heater.

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Nationwide Scheduled Sauna Freight — $990

Premium freight delivery with coordinated scheduling. Oversized sauna shipments are typically delivered curbside, and unloading requirements may vary by model and site access.
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Nordic Craftsmanship. Everyday Possibility.

The Celto M brings the character of Leil’s outdoor saunas into an approachable design with room to share. As the larger model in the Celto collection, it offers a wider interior while maintaining a compact 81″ × 56″ footprint.

Its construction centers on large, ready-made CLT panels rather than individual wall boards. These substantial spruce panels form the walls, ceiling, and floor, simplifying assembly while creating a solid timber enclosure that helps hold warmth inside.

Bronze-tinted glass keeps the interior open to the surrounding landscape. Aspen seating, a generous backrest, and four ventilation openings complete a space designed around the pleasure of traditional sauna bathing.

Select your heater package, add optional lighting, and finish the exterior in a tone that suits your home. The result is a personal wellness space with natural materials, thoughtful details, and an inviting sense of calm.

Authentic Finnish Dry & Steam Sauna

Enjoy traditional dry heat or create löyly by pouring water over heated sauna stones, following your selected heater’s instructions.

Thick CLT Panels That Help Retain Heat

The 60mm Nordic spruce cross-laminated timber structure provides substantial walls and insulation that helps keep warmth inside the sauna.

More Room to Enjoy Together

Designed for up to three people, the Celto M offers additional seating room for shared sauna sessions or couples who appreciate a more spacious interior.

Two-Level Aspen Seating

Upper and lower seating lets you choose your preferred position and heat level. A wide, single-board backrest adds comfortable support.

Bronze Glass & Clean Nordic Design

Generous tempered glass brings outdoor views into the sauna, while its bronze tone complements the natural wood and contemporary silhouette.

Straightforward Panel Assembly

Ready-made panels reduce the work of assembling individual boards. Leil estimates approximately 4–6 hours for assembly, with timing depending on experience and site readiness.

A Finish That Complements Your Home

The natural spruce exterior provides a starting point for your preferred look. Apply the required exterior varnish with UV protection to preserve and protect the wood.

  • 60mm Nordic spruce CLT wall panels
  • 60mm CLT ceiling panels
  • 60mm CLT floor panels
  • Bronze tempered glass windows
  • Bronze tempered glass sauna door
  • Premium door handle and black hinges
  • Two-level aspen bench system
  • Wide, single-board aspen backrest
  • Four ventilation openings
  • Treated brown timber base frame
  • Self-adhesive EPDM roof covering
  • Detailed assembly manual

Please Note: The base sauna does not include a heater package, purpose-built heater stand, interior LED lighting, or accessories. Review your selected heater package for included stones and controls.

Required exterior treatment: The sauna arrives unstained. A suitable exterior varnish containing UV protection must be applied to the exterior wood.

General

Model: Leil Celto M

Capacity: Up to 3 People

Sauna Type: Outdoor Traditional Finnish Sauna

Installation: Outdoor

Assembly: DIY Prefabricated Panel Kit

Estimated Assembly Time: Approximately 4–6 Hours

Dimensions

Exterior: 81″ W × 56″ D × 84″ H

Interior Footprint: 74″ W × 50″ D

Upper Bench Depth: 24″

Construction

Walls: 60mm / Approximately 2.4″ Nordic Spruce CLT

Ceiling: 60mm CLT

Floor: 60mm CLT

Benches: Two-Level Aspen

Backrest: Wide, Single-Board Aspen

Windows: Bronze Tempered Glass

Door: Bronze Tempered Glass

Door Hardware: Premium Handle and Black Hinges

Base Frame: Treated Brown Timber

Roof: Self-Adhesive EPDM Roof Covering

Ventilation

Ventilation Openings: Four

Exterior Finish

Supplied Finish: Natural, Unstained Spruce

Required Treatment: Suitable Exterior Varnish Containing UV Protection

Heater & Lighting

Heater: Selected Separately

Celto Heater Stand Compatibility: Harvia KIP and HUUM DROP

Interior Lighting: Optional LED Strips Beneath the Backrest

Country of Origin

Estonia

What to Expect

The Celto M arrives as a DIY sauna kit with large prefabricated panels and a detailed assembly manual. Prepare a flat, level, stable, load-bearing foundation before delivery and review the instructions before starting.

Plan for at least two capable adults to handle substantial components. Leil estimates approximately 4–6 hours for sauna assembly; foundation preparation, exterior finishing, and heater installation require additional time.

Your selected heater must be installed according to its manufacturer’s instructions, including mounting, ventilation, sensor placement, and clearance requirements. Electrical work should be completed by a qualified electrician in accordance with applicable local codes.

Before completing your installation, treat the exterior wood with a suitable exterior varnish containing UV protection.

Resources

View the Celto M Dimensions Diagram

View the Celto M Installation & Owner's Manual

View the Celto Assembly Video

Foundation Requirements

A solid, level foundation is essential for the Celto S. The base must be able to support the sauna’s total weight, bathers, heater, stones, and any accessories.

Recommended foundation options may include:

  • Concrete slab
  • Reinforced concrete pad
  • Properly engineered deck
  • Level paver base
  • Compacted gravel pad with structural support
  • Contractor-built platform designed for the sauna load

The sauna should not be installed directly on soft soil, uneven ground, or any surface that may settle over time.

Access Planning

Before delivery, confirm that the sauna components can be safely moved from the delivery location to the final installation area.

Review the full path from the driveway or delivery point to the final sauna location, including:

  • Driveway access
  • Gate width
  • Tight turns
  • Stairs
  • Slopes
  • Retaining walls
  • Landscaping
  • Overhead wires
  • Fences
  • Equipment access
  • Space for staging components

If the sauna will be installed in a backyard, your contractor or installation crew should have a clear plan for moving the materials after delivery.

Assembly

The Celto S is delivered as a sauna kit and is not delivered fully assembled. It is designed for on-site assembly by an experienced DIYer, contractor, carpenter, or sauna installation professional.

Electrical Requirements

Electrical requirements depend on the heater package, controller, lighting, and accessories selected. Most electric sauna heaters require a dedicated 220–240V circuit installed by a licensed electrician.

Your electrician should review the exact heater manual, controller manual, extension box instructions if applicable, and lighting requirements before quoting or beginning work.

If you choose a Wi-Fi heater package, confirm that your sauna location has a strong internet connection or plan for a Wi-Fi extender, outdoor access point, or point-to-point connection.

The Leil Celto M ships via scheduled freight delivery for $990.

Your sauna will arrive securely packaged on a freight truck equipped with a liftgate, and the freight carrier will contact you in advance to schedule a delivery appointment.

Delivery Includes

  • Scheduled freight delivery
  • Liftgate service
  • Delivery appointment coordinated by the freight carrier
  • Curbside delivery to an accessible location at the shipping address

Because of the size and weight of the sauna shipment, please make sure the delivery location is accessible to a full-size freight truck.

Please Note: Standard freight delivery does not include unpacking, assembly, placement in the backyard, or moving individual sauna components to the installation location.

If your property has limited truck access, a steep driveway, narrow road, gated entry, or other delivery considerations, please contact us before ordering so we can help review the best delivery option.

Our team is always happy to help you plan ahead so delivery day goes as smoothly as possible.

Your Celto M includes the applicable manufacturer’s warranty. NW Immersion is here to help with product questions and warranty assistance.

Installation, care, and use must follow the manufacturer’s instructions. Your selected heater and accessories carry their respective warranty terms.

Frequently Asked Questions

Leil Celto M 3 Person Outdoor Traditional Finnish Sauna - NW Immersion

Leil’s Celto collection brochure identifies the Celto M as a three-person sauna. Its wider interior also makes it a comfortable choice for couples who want additional room.

The Celto S is designed for two people, while the Celto M accommodates three. The M offers a wider interior while keeping the same 56″ exterior depth.

No. Choose a compatible heater package separately. Check your package description for included sauna stones, controls, and other components.

Include the purpose-built Celto heater stand when purchasing a compatible Harvia KIP or HUUM DROP package. The stand is designed specifically for these heaters in the Celto series.

No. LED lighting is an optional upgrade. The lighting sits beneath the backrest to create a soft, indirect glow.

No. It arrives in natural, unstained spruce. The exterior must be treated with a suitable exterior varnish containing UV protection. This is a required installation step.

Leil estimates approximately 4–6 hours. Allow additional time for foundation preparation, exterior treatment, and heater installation, and arrange help for lifting heavy components.

A flat, level, stable, load-bearing foundation suitable for the sauna and its occupants. Follow the assembly instructions and confirm that your chosen surface can support the installation.

Yes, when using a compatible traditional sauna heater. Follow the heater manufacturer’s instructions for water use to enjoy authentic Finnish löyly.

Ventilate thoroughly after use and clean interior surfaces with mild, non-abrasive products. Inspect exterior wood and its protective coating at least annually, and renew the finish as needed.

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