Kohler C1 Graphite Gray Indoor Sauna Kit

A sauna doesn't have to look like it was hidden away in a basement. The Kohler C1 was designed to be seen — a graphite-gray exterior with the clean, contemporary restraint of a considered piece of furniture, wrapping an interior that tells a warmer story. Step through the tempered-glass door and the mood shifts instantly: light Scandinavian spruce, the soft honey tone of handcrafted obeche-wood benches, and a warm-white glow that rises quietly from behind them. It reads as calm before you've felt a degree of heat.

At the center of it all is a freestanding electric heater crowned with sauna stones — the traditional heart of the ritual, radiating an even, enveloping warmth you can deepen with a ladle of water. This is the old Nordic experience, unhurried and elemental, delivered with modern ease. An external digital display lets you set the temperature, the session length, and the lighting without breaking the spell inside, while a dual thermostatic system holds everything steady and repeatable, session after session.

Comfort here is engineered, not incidental. An intelligent ventilation system keeps fresh air moving through the cabin so the heat never feels stale or stifling, and thick mineral-wool insulation behind tongue-and-groove walls keeps the warmth where it belongs — which is as much about efficiency as it is about comfort. Little rituals are built in too: an interior thermometer to read the room, and a beech-wood hourglass timer whose falling sand marks the session in a way no phone ever should.

Perhaps its quietest luxury is how easily it belongs. The C1 can stand as a freestanding focal point in a spare room or gym, or tuck neatly into an alcove, and it comes in sizes that suit a solo unwind or an evening shared with company. However you place it, it arrives as a complete kit designed to become a permanent, glowing fixture of the home — the room you find yourself drifting toward when the day asks to be let go.

• Modern graphite-gray exterior wrapping a light, welcoming Scandinavian spruce interior
• Freestanding electric heater with sauna stones for authentic, even, traditional heat
• Handcrafted obeche-wood bench, backrest, headrest, and stool for relaxed repose
• Soft warm-white indirect lighting glowing from behind the benches
• Intelligent ventilation system keeps fresh air circulating for comfort throughout the session
• Dual thermostatic control with an external digital display for temperature, time, and lighting
• Interior thermometer and a beech-wood hourglass sand timer to track your session
• Mineral-wool insulation and tempered glass hold heat for an efficient session
• Freestanding or alcove installation, in sizes for two to five people
• Arrives as a complete kit — cabin, heater and stones, benches, lighting, and installation hardware

What sizes does it come in?
The C1 is available in 2-, 3-, and 5-person sizes. The 2- and 3-person cabins use a 4.5 kW FERO heater, while the larger 5-person cabin uses a 9 kW heater; each size has its own footprint, all sharing the same 83-1/2" height.

Can it be freestanding, or does it need an alcove?
Either. The C1 is designed to stand on its own as a focal point or to tuck neatly into an alcove, so it fits a spare room, a home gym, or a dedicated wellness space.

Do I need an electrician to install it?
Yes. The heater runs on a dedicated Class A GFCI circuit — 220–240V, 30A for the 2- and 3-person sizes or 50A for the 5-person size — which must be installed by a licensed electrician.

Is the floor included?
A full floor kit is available as an option and lets you install the sauna on any level surface. Without it, the cabin sits directly on your prepared, level floor.

Is professional installation available?
Yes. Professional installation can be added as an upgrade at checkout if you'd rather have the cabin assembled and set up for you.

How is it delivered?
Free USA shipping. Your order is packed and shipped within 1–3 business days and typically delivered within 5–10 business days.