Single 2.4 · HUUM HIVE 15 kW
The Leil Round Cube Single is an outdoor sauna with a panoramic glass front, thermally modified timber walls and tiered benches facing each other. Compare two cabin depths to find the right fit for your space. Heater equipment is sold separately.
Inside & outside · 360°Our photograph from Estonia
1. Choose cabin depthSee the differences
Single 2.4 · HUUM HIVE 15 kW · Leil’s recommended pairing
2. Choose a heater →Single 2.4Approximate dimensions
Heater equipment and decorative options are selected separately.
Open the 2.4 drawingBoth include the extension box, full-size heater guard and 16 boxes of rounded stones. Load stones to HUUM’s instructions and retain any surplus.
Includes AirIQ Wi-Fi control, the Air L guard and six boxes of stones. Load the heater to its manual and retain surplus stones. Your installer must provide Saunum’s ventilation layout and keep the air outlet below the bench with its 20″ discharge zone clear.
Your selected cabin and every item in your heater setup are itemized below.
Cabin finish: Thermowood, mirrored glass and black shingles.
Delivery: $1,500 cabin freight to the lower 48 is included in the total above.
Arrange separately: unloading your curbside kit delivery, exterior treatment, assembly and electrical installation. Remote or restricted-access delivery may cost extra. Delivery timing is confirmed with Leil.
Leil’s current manual limits its 24-month material and production warranty to manufacturer-assembled saunas. Written US kit coverage remains unconfirmed. Read the installation manual and warranty terms.
Follow your selected heater’s installation manual for electrical supply, ventilation and clearances. The 80½″ interior height is the maximum at the center.
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2. Choose your heater
Choose an open stone basket, air blending, timber cladding or classic stainless steel. The heater sizes below are matched to the standard glass-front cabin.
Start with HIVE 15, Leil’s recommended pairing. Choose Air L 15 for air blending or CORE 11 for a compact timber finish.
Interior ceiling: 80½″ maximum at the center, lower toward the curved sides. Follow the selected heater’s installation clearances. These selections use US 240 V equipment.
Leil’s recommendation
For Single 2.4
An open basket of stones for generous steam. Leil recommends this full-size HIVE for Single 2.4 and 2.6.
Your package includes a UKU Local or Wi-Fi controller, extension box, full-size guard and 16 boxes of rounded stones.
Air-blending alternative
For Single 2.4
Air blending draws heat down from the ceiling and mixes it with cooler air for more even warmth at bench level.
Your package includes AirIQ Wi-Fi control, the Air L guard and six boxes of stones.
Harvia choice for 2.6
For Single 2.6
The classic stainless-steel option for Single 2.6. CLUB 15 is sized for the cabin’s glass front and solid timber walls.
Your package quote includes the 240 V, single-phase heater, Harvia Xenio controls and power unit, and three boxes of sauna stones. Your installer provides the required wooden safety rail.
Timber-clad alternative
For Single 2.4
A compact heater with timber cladding for Single 2.4. Choose CORE when you want the heater to blend into the wood interior.
The standard centered rear position meets CORE’s height requirement. Choose your finish and UKU controls with a Ben; sauna stones are included in your package quote.
Selected heater: HUUM HIVE 15 kW.
Your heater selection stays with your cabin depth.
Sized for this cabin. These selections account for the standard glass front, timber construction and each heater manufacturer’s sizing rules. HIVE 15 is Leil’s recommendation for Single 2.4 and 2.6. Air L 15 covers both depths. CORE 11 is offered for Single 2.4. Harvia CLUB K15G is our Harvia choice for Single 2.6.
Use the centered heater position. Both depths have approximately 80½″ of interior height at the center. Install on the standard floor in the rear center bay and maintain the heater manual’s wall, bench and overhead clearances. Keep CORE and CLUB at the factory floor level, without a raised platform or added overhead trim.
| Cabin / heater | Room height |
|---|---|
| Single 2.4 & 2.6 | Approx. 80½″ at the center |
| HUUM CORE 11 | 80″ minimum |
| HUUM HIVE 12 / 15 | 77″ minimum |
| Saunum Air L 15 | 73″ minimum |
| Harvia CLUB K15G | 78″ minimum; 52″ clear above the heater rim |
Air L ventilation. Place the air outlet below the underside of the bench and leave its 20″ discharge zone clear. While the fan runs, keep adults at least 20″ and children at least 40″ from the outlet. Your installer must provide Saunum’s intake, exhaust and sensor layout during assembly.
CLUB installation. Use the centered rear bay. Keep 6″ between the heater and walls or benches, 2½″ to the wooden safety rail and 52″ above the heater rim. Keep the rail below the rim. The package uses Xenio controls with their power unit and three 44 lb boxes of Harvia stones. The metal stone grille does not replace the wooden safety rail. Provide 45 square inches each of intake and exhaust ventilation, and install the controls and power unit in a dry indoor location.
Electrical and stone loading. These packages use US 240 V, single-phase equipment. Have your electrician follow the exact heater and controller wiring diagrams. Load stones to the heater manual and retain any surplus.
Changing the cabin? These choices are for the standard glass-front layout. Send us your revised plan before adding glass, tile or changing the interior so we can size the equipment for that configuration.
Why these sizes? HIVE 18 exceeds the standard cabin’s sizing or clearance limits. Harvia Spirit 9, KIP 8, Saunum Air L 10 and Air Perfect 10 are too small once the required timber and glass allowances are included.
Cabin drawings · Leil assembly drawings · HIVE US manual · CORE US manual · Air L US manual · CLUB US manual
Round Cube Single
Benches face each other across one open room. The broad glazed front brings the view into the sauna; the curved timber shell gives it a place of its own in the yard. Start with how you like to sit, then choose the depth.
Opposing tiered benches leave a central aisle. Leil’s seating figures range from six to eight; allow more room per person if you like to recline.
The glazed front stretches across the room. Confirm your preferred glass tone in the package, along with any juniper wall or lighting.
The Round Cube Single received a 2024 Red Dot: Best of the Best award. See the design award.
Choose the room for your space
Both are about 121 inches wide and 88 inches tall. The difference is depth, bench length and how much room you want to share.
*Seating is Leil’s catalogue capacity. Allow more space per person for reclining. Dimensions below are approximate inches.
| Measurement | 2.4 | 2.6 |
|---|---|---|
| Exterior depth | 94″ | 102″ |
| Exterior width | 121″ | 121″ |
| Exterior height | 88″ | 88″ |
| Interior depth | 74.4″ | 82.3″ |
| Seating, per Leil | 6–8 people | 8 people |
| Upper bench, each | 73″ × 23″ | 81″ × 23″ |
Dimensions are approximate inches from Leil’s current drawings. The 2.4 and 2.6 labels are Leil’s model names. Cabin dimensions are not installation clearances: allow for the door, service access and the selected heater’s requirements.
Our view · Inside and out
Explore three 360° photographs from our visit to Leil’s terrace in Estonia: inside the Single 2.6 m, then the Round Cube from the front and side. Choose a view, then drag to look around.
Seen in person · Sauna Marketplace
Ben Burger and Ben Frizzell visited Leil on September 1, 2026. We used and photographed the Round Cube Single 2.6 m on Leil’s balcony, with its opposing benches, juniper wall and wood stove. Leil has confirmed the model shown. Use the exact drawings for measurements.
Cabin, equipment and site work
The online cabin kit uses standard mirrored glass. Heater equipment, LED lighting and juniper decoration are separate. Photos and renderings show several configurations; optional items are not included just because they appear in an image.
From choosing to using
The 360° view shows the Round Cube Single 2.6 m with a juniper wall and wood-burning heater on Leil’s balcony in Estonia. Leil confirmed this is the cabin Ben Burger and Ben Frizzell used on September 1, 2026. The 2.4 is a different depth; use the drawing for your selected size when planning your cabin.
The cabin price excludes heater equipment. Choose the HIVE 15 package with its UKU control, extension box, guard and stones, or the Saunum Air L 15 package with AirIQ control, guard and six boxes of stones. Lighting, decorative walls and wood-burning equipment are separate inquiries.
A level, stable base with drainage and support in the locations shown by the model’s installation documents. Keep the timber base out of standing water and follow the manual’s moisture-barrier instructions. A deck needs its load capacity checked for the completed sauna, equipment and occupants.
Standard lower-48 curbside freight is $1,500 per cabin. You arrange unloading, suitable access and the move to your prepared base. Remote or restricted access, special equipment and redelivery can cost extra. Inspect the crate, photograph visible damage and record it with the carrier before signing.
The online setup is the standard mirrored-glass cabin kit. We confirm dispatch and delivery timing with Leil; no fixed ship date is promised. Ask us about different glass, decoration or an assembled package.
Treat interior wood and benches before first use, then maintain them once or twice a year with suitable sauna products. The supplied 2.4/2.6 construction manual says DIY cabins arrive without an exterior protective treatment; assembled cabins receive an initial factory coating. It calls for a further exterior coat after about two months. Keep the room dry between sessions and follow the full care instructions in the manual.
The supplied 2.4/2.6 construction manual describes a 24-month material and production warranty restricted to saunas assembled by the manufacturer. Written US kit coverage remains unconfirmed; an unconditional DIY warranty is not included in this listing. Review the manual and discuss coverage with us before ordering if it affects your choice.
Find your fit
Compare the other Leil cabins we photographed in Estonia.
| Model | Approx. footprint | Worth choosing for |
|---|---|---|
| Viva 210 | 83″ W × 71″ D | Compact depth, straight benches, timber-framed glazing |
| Patio S | 94″ W × 94″ D | Square room, corner seating, broad glazing |
| Black Cube Classic | 86″ W × 65″ D | Shallow footprint, rounded front, L-shaped benches |
| Round Cube Single This page | 121″ W × 94″ / 102″ D | Opposing benches; compare two depths on one page |
Also considering Celto S or Celto M? Bring those into the comparison, or explore more Leil saunas.
Leil designs and builds saunas in Võnnu, southern Estonia. Its name refers to the steam created when water meets hot sauna stones. Our visit gave us a closer look at the cabins and their construction; the photos and 360° views here are part of what we brought home.
Select the depth, add a complete heater package and see your total before checkout. We’re here if you want help with the fit or installation.
Cabin and heater equipment itemized in your cart.
A LITTLE HELP FROM THE BENS
Tell us where it’s going, who’s joining you, and whether you want room to stretch out. Bring a photo or rough dimensions. The Bens can help you compare saunas and work through the heater, assembly, and delivery details.
Find your sauna with a Ben ↗A person count only tells you so much. Look at the bench layout and usable length, especially if you want to lie down.
Compare saunas ↗Lay out the room, try wood and bench options, and see your materials come together in SaunaDesignPro.
Start designing your sauna ↗Single-family photographs. Equipment, finishes and photographed depth vary.
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