Leil Saunas Celto M (3-Person) Outdoor Sauna Kit

The Leil Celto outdoor sauna lineup

Celto S2 people · 65 x 56 inFrom $4,990View →You are viewing this oneCelto M3 people · 81 x 56 inFrom $5,990

More bench room, without giving up the compact depth

The Celto M gives three people a real two-level sauna while keeping the same 56-inch depth as the S. At 81 inches wide, it is the one to choose when you want room to stretch out or regularly sauna with a third person. The shell is not thin decorative paneling. Its walls, ceiling, and floor are 2.4-inch solid spruce cross-laminated timber, with an aspen bench and broad one-board backrest where your skin actually touches the room.

Know this before anything else: the exterior arrives natural and unfinished. Apply a suitable clear, UV-protective weatherproof finish after assembly, inspect it at least annually, and recoat it as needed. That maintenance is part of owning this entry-priced Celto, not fine print.

Firsthand with Leil in Estonia

Ben Burger and Ben Frizzell visited Leil in Estonia in September 2026 and work closely with the company. The Celto M stood out as the practical middle answer: materially roomier than the S, still quick to assemble, and still far below the price of Leil’s architectural flagship cabins. We were impressed by how much real sauna it puts into a compact crate.

What the Celto M kit includes

Choose the heater as a complete system

The base cabin does not include a heater. For Celto M, Leil approves an 8 kW Harvia KIP and a HUUM DROP 9 on its purpose-built Celto stand. You can take the KIP with its built-in controls, the same KIP with Harvia’s Xenio Wi-Fi control, or the DROP 9, our recommended app-controlled system. Each choice includes the current North American heater body, the control it needs, and the correct stones. The Celto stand is priced on its own line just below the heater. Every heater here sits on one, and it is listed separately so you can see what the heater costs and what the stand costs.

Harvia KIP 8 kW: simplest and best value

Our straightforward package uses the current black KIP80B with controls built into the heater and one 45-pound box of approved 2-to-4-inch stones. The current KIP manual lists the 240-volt single-phase model at 33.3 amps with #8/2 copper conductors. A licensed electrician must make the final circuit and code decision.

Harvia KIP 8 kW with Wi-Fi: the same heater, started from your phone

This package uses the black KIP80W, the same 8 kW body without the built-in dial, with the Harvia Xenio CX170 Wi-Fi control and one 45-pound box of approved 2-to-4-inch stones. Set the temperature and the session length at the wall panel or in the Harvia app, so the room is hot when you walk out to it. The CX170 is rated to 10.5 kW on a wall-mounted heater, comfortably above this 8 kW stove, and the electrical figures match the KIP80B above. One planning note for an outdoor cabin: the control panel may go inside the sauna, mounted low and away from the heater, but the power unit has to be mounted outside the room in a dry spot that stays above freezing. Your electrician places both. It is the least expensive way to get app control on a Celto, about $1,500 less than the DROP 9 package.

HUUM DROP 9: our recommended Celto M package

The DROP 9 package uses the current North American 9 kW heater body, a complete UKU Wi-Fi control package, and four 33-pound boxes of approved 2-to-4-inch stones. The heater holds about 121 pounds of stones; the package supplies 132 pounds so the installer can place them correctly.

Our Celto M recommendation is DROP 9. Leil explicitly approves DROP 9 for the M, and HUUM’s current US manual rates it for 283 to 460 adjusted cubic feet. Our independent check using Leil’s exact interior footprint and listed glass dimensions also places the M comfortably inside that range. It is the clear app-controlled choice for this model and gives the wider outdoor cabin strong heat-up and recovery. KIP80B is also Leil-approved and is our value choice when simple built-in controls and a lower package cost matter most. If you want app control without the DROP price, KIP80W with the Xenio Wi-Fi control is the cheaper route to it.

Site and installation checklist

• Foundation: prepare a level, stable, load-bearing base. The current Celto manual shows the base-frame assembly but does not specify an engineered foundation, so local site and code requirements control.
• Unloading: plan access and equipment for an approximately 30 by 79 by 39-inch package weighing about 1,102 pounds. Curbside delivery is not placement in the yard.
• People and time: Leil estimates 4 to 6 hours for assembly. The manual says some parts require two or more people for safe lifting.
• Roof: install the supplied EPDM membrane and use exterior-grade sealant continuously where the manual shows the covering slat meeting the membrane.
• Exterior: finish the natural spruce promptly with a clear UV-protective weatherproof coating and inspect it yearly.
• Electrical: heater, control, lighting, and final circuit work belong to a licensed electrician following the exact heater manual and local code.
• Drainage: a floor drain is not shown or specified in the current Celto manual. Decide whether your site needs one before the base is built.

Celto S or Celto M?

Current manual and dimensions

Review the current Celto M assembly manual, the exact imperial drawing, and the Celto collection overview before finalizing the site. We host the current files here so the dimensions, parts list, roof work, ventilation, and handling instructions stay with the product.

Questions we would ask before you order

Does the cabin arrive stained or sealed?

No. It arrives as natural spruce. A suitable clear UV-protective weatherproof finish is required after assembly.

Is the optional lighting already shown in some photographs?

Yes. Some supplied photographs show the optional dimmable LED strip beneath the backrest. Lighting is not part of the base kit unless selected.

Is a heater included?

No. Choose a complete heater system or bring us the exact heater you already own so we can check output, controls, stones, stand fit, clearances, and electrical requirements.

Does Celto need ventilation after use?

Yes. The kit includes four ventilation openings, and Leil’s care instructions say to keep the sauna well ventilated after each use to limit moisture buildup.

Call or text Ben at (844) 565-1113 with a photo of the site, the available footprint, and how you actually plan to use the room. We will tell you whether the wider M earns its extra 16 inches or whether the smaller S does everything you need.

Delivery and unloading

Freight is a flat $990 per cabin to the contiguous United States and DC. Delivery is curbside, so plan equipment and people for an approximately 30 by 79 by 39-inch crate weighing about 1,102 pounds. For Alaska, Hawaii, Canada, or any other destination, call or text us for a shipment plan before ordering.

When the truck arrives: inspect before you sign

Leil’s freight instructions make the delivery receipt part of any damage claim. Before the driver leaves, inspect the shipment, pallet, crate, labels, and packaging. Count the pieces you can identify. If anything is visibly damaged, the packaging is damaged, or pieces appear to be missing, write that specifically on the delivery receipt before signing. Do not write only “subject to inspection.” Photograph the full shipment, pallet, labels, packaging, and every damaged area while the carrier is still there.

Some small components may be packed inside the crate, so check the package contents against the manual before declaring a shortage. If damage is concealed, contact us immediately: Leil requires notice within 48 hours of delivery with the order number, delivery date, description of the damage, photographs, and the signed delivery receipt. Keep the damaged item and all original packaging for at least 30 days. Do not discard, repair, install, or use a damaged item unless Leil gives written approval.

Standard delivery is curbside. You are responsible for the people and equipment needed to unload safely. Tell us about a narrow road, steep grade, gated entrance, island, ferry, limited truck access, or other delivery restriction before the shipment is booked; accessorial carrier charges may apply, and freight arrival estimates are not guaranteed appointments.