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Introducing the Leil® Celto S Outdoor 1-2 Person Cabin Sauna — from a distinguished sauna manufacturer hailing from Estonia, renowned for over 15 years of unparalleled expertise in production.
The Leil® Celto series marks a new approach to the outdoor sauna: a solid cross-laminated timber cabin built to be genuinely accessible, without the compromises usually found at this level. Where most entry-level saunas rely on thin panelling and frame construction, the Celto S is built from 60mm solid CLT spruce panels — the same structural material used in modern timber architecture.
Its compact square footprint slots naturally into a courtyard, a terrace corner, or a narrow side yard where a full cabin simply would not fit. Floor-to-ceiling bronze glazing on the front elevation keeps the interior connected to the landscape, while the warm spruce interior and concealed LED backlighting create a calm, enveloping bathing environment once the door closes.
Because the Celto S arrives as a set of pre-manufactured CLT panels rather than hundreds of individual components, assembly is measured in hours rather than days — most builds are completed by two people in approximately four hours. The entire sauna ships in a single crate measuring just 75 x 200 x 100cm, making it one of the very few outdoor saunas that can be delivered by standard tailgate service, with no crane, forklift, or specialized equipment required at the destination.
Features:
WALLS Constructed from 2.4" (60mm) solid cross-laminated timber panels in natural spruce, delivering structural rigidity and thermal mass in a single element — no framing, no separate insulation layer, no interior cladding required.
ROOF Comprised of three solid CLT roof panels finished with a fully adhered EPDM membrane for long-term weather protection, with covering slats sealed along the entire perimeter against water ingress.
FLOOR Engineered from solid CLT floor panels mounted on treated timber bearers, raising the cabin off the ground for ventilation and moisture management beneath the structure.
DOOR A 72.8" x 22.8" (1850 x 580mm) door with 8mm tempered bronze glass, hinged within a solid CLT frame for a seamless transition into the sanctuary of relaxation.
GLAZING Four panels of 8mm tempered bronze glass set into the front elevation with aluminum retaining profiles, offering natural light, a panoramic outlook, and a touch of elegance to the ambiance.
BENCHES Two-level bench configuration with a 23.6" (600mm) deep upper bench and a lower bench, both in smooth-planed light wood, with a full-width backrest above the upper tier.
LIGHTING Optional LED set mounted behind the backrest, casting indirect warm light across the rear wall. Includes LED strip, cable, transformer, dimmer switch, and installation box.
VENTILATION Complete two-point ventilation system with a lower intake and an adjustable upper exhaust, both fitted with exterior grilles for controlled airflow through the sauna room.
HEATER STAND A purpose-designed heater stand developed specifically for the Celto series, engineered to accept both HUUM Drop and Harvia KIP heaters.
Indulge in the epitome of outdoor bathing with the Leil® Celto S — where solid timber construction meets genuine accessibility.
Specifications:
- Capacity: 2-3 people
- Room: 1
- Construction: 2.4" (60mm) solid CLT spruce panels
- Exterior Finish: Natural spruce, untreated
- Exterior Dimensions:
- Height: 82.7" (2100mm)
- Width: 64" (1626mm)
- Depth: 55" (1396mm)
- Sauna Room Dimensions: 57.9" x 48.8" (1470 x 1240mm)
- Interior Height: 74.8" (1900mm)
- Door: 72.8" x 22.8" (1850 x 580mm), 8mm tempered bronze glass
- Roof: EPDM membrane over solid CLT panels
- Crate Dimensions: 29.5" x 78.7" x 39.4" (750 x 2000 x 1000mm)
- Assembly Time: Approximately 4 hours (2 people)
- Warranty: 1 year
- Weight: REPLACE_WEIGHT
Compatible Heaters:
The Celto S is engineered around a 74.8" (1900mm) internal height, which requires a compact-format heater. The following units are confirmed compatible and mount directly to the included Leil heater stand:
- HUUM DROP 7 kW
- HUUM DROP 9 kW
- Harvia KIP 8 kW
Taller heater formats are not suitable for this cabin. Our team can confirm the right pairing for your climate and usage pattern — call or text us before ordering.
Natural Wood Character:
The Celto S is built from natural, untreated spruce. This is a living material, and two characteristics are entirely normal and expected across the lifespan of the sauna:
- Surface checking: Fine cracks may appear along the panel faces as the timber responds to seasonal humidity and temperature cycles. This is inherent to solid wood and does not affect the structural integrity of a CLT panel.
- Resin bleed: Spruce contains natural resin, and small amounts of sap may weep from knots and grain, particularly during the first heating cycles. This can be removed with a plastic scraper once cooled, or simply left to crystallize.
Neither is a defect. Both are the signature of solid, natural timber rather than engineered composite panelling. We recommend applying a quality exterior weatherproof finish to the outer surfaces after assembly to protect against moisture, UV, and temperature swings.
Set Includes:
- Cabin (pre-manufactured CLT panel set)
- Two-level benches and backrest
- Ventilation set (upper and lower)
- Heater stand (HUUM Drop & Harvia KIP compatible)
- EPDM roof membrane
- Installation drawings
- Hardware


