Kohler C1 Indoor Sauna – 2, 3 & 5-Person | Electric, Freestanding or Alcove

Kohler C1 Indoor Sauna | 2, 3 & 5-Person | Graphite Grey

Premium Freestanding or Alcove Indoor Sauna with FERO Electric Heater

The Kohler C1 Indoor Sauna brings a refined traditional sauna experience into your home with a premium Scandinavian spruce interior, a sleek graphite grey exterior, tempered glass door and windows, integrated lighting, and an included FERO electric sauna heater. Designed for both freestanding and alcove installation, the C1 offers a flexible indoor sauna solution for homeowners who want luxury, comfort, and reliable performance in a clean, contemporary design.

Available in sizes for up to 2, 3, or 5 people, the Kohler C1 is built with mineral wool insulation, an Aerotherm ventilation system, a digital control panel, and warm white indirect backrest lighting. Each sauna includes the electric heater, sauna stones, heater guard, lighting, benches, control panel, and installation hardware.

Who This Is For

The Kohler C1 is the right choice for homeowners who want a premium, architect-quality indoor sauna with a modern graphite grey exterior, digital controls, and flexible freestanding or alcove placement. It's ideal for dedicated sauna rooms, finished basements, or large bathrooms.

Key Features

• Available in 2-person, 3-person, and 5-person layouts
• Freestanding or alcove installation flexibility
• Premium Scandinavian spruce interior with graphite grey exterior
• Included freestanding FERO electric sauna heater, stones, and heater guard
• Warm white (2700K) indirect backrest lighting
• Tempered glass door and windows
• External digital control panel for temperature, session time, and lighting
• Dual thermostatic control for safe, consistent, repeatable sessions
• Aerotherm ventilation system for oxygen supply and air exchange
• 2.1" mineral wool insulation between walls
• Tongue-and-groove walls for a seamless appearance
• Beech wood door handles designed to stay cool to the touch

Available Size Options

• 2-Person — Exterior: 65.6"W × 47.8"D × 86.4"H | Interior: 59.1"W × 39.4"D × 77.4"H | 4.5kW / 30A / NEMA 6-30P
• 3-Person — Exterior: 77.4"W × 55.7"D × 86.4"H | Interior: 70.9"W × 47.3"D × 77.4"H | 4.5kW / 30A / NEMA 6-30P
• 5-Person — Exterior: 81.4"W × 79.3"D × 86.4"H | Interior: 74.8"W × 70.9"D × 77.4"H | 9kW / 50A / NEMA 6-50P

Specifications

• Interior Material: Scandinavian Spruce
• Exterior Finish: Graphite Grey
• Seating Material: Obeche Wood
• Door & Window Material: Tempered Glass (0.3")
• Door Handle Material: Beech Wood
• Heater Safety Rail: Obeche Wood
• Floor Type: Spruce or No Floor
• Installation Method: Freestanding or Alcove
• Wall Clearance Required: 2" (5 cm)
• Ceiling Clearance Required: 8' (2.4 m)
• Electrical Cord Length: 9' 10" (2.9 m) — exits top rear
• Heater Voltage: 220–240V / 50–60 Hz
• Sauna Room Voltage: 240V / 50–60 Hz
• Heater Safety Distance: 1.6" (4 cm)

Weight by Size

• 2-Person: 694.6 lbs (No Floor) / 713.1 lbs (With Floor) | Ships at 981.2 / 999.8 lbs
• 3-Person: 760.7 lbs (No Floor) / 786.7 lbs (With Floor) | Ships at 1,047.4 / 1,073.3 lbs
• 5-Person: 1,124.6 lbs (No Floor) / 1,164.8 lbs (With Floor) | Ships at 1,499.4 / 1,539.6 lbs

What's Included

• Front frame, side wall, rear wall, and ceiling panels
• Bottom frame, backrest, and benches
• FERO electric sauna heater, heater guard, and sauna stones
• Digital control panel and lighting
• Installation hardware and operation manual

Optional Accessories

• Wall-mounted thermometer
• Beech 20-minute hourglass sand timer
• Headrest
• Stool

Shipping & Delivery

This product ships free via freight carrier to the contiguous United States. Delivery is made by special appointment on a wooden pallet and is curbside only — the driver will lower the shipment to ground level. You may be contacted prior to shipping to review delivery details and site-specific conditions. Estimated Delivery Time: Most orders arrive within approximately 14–21 business days, including processing and transit time.

Installation Notes

• Designed for freestanding or alcove indoor installation
• Requires a dedicated 240V electrical connection — consult a licensed electrician
• Minimum 8' ceiling clearance and 2" wall clearance required
• Professional assembly is recommended; installation service available as a variant option
• Review the Readiness Guide before ordering to confirm site requirements

Warranty

This product includes a 5-year limited warranty for consumer use. As an authorized Kohler retailer, Prime Regeneration ensures complete warranty coverage is passed through to you at the time of purchase.

Manuals & Documentation

• C1 Readiness Guide
• 2-Person Installation & Operation Manual
• 3-Person Installation & Operation Manual
• 5-Person Installation & Operation Manual
• Spec Sheet – 2-Person (K-39963)
• Spec Sheet – 3-Person (K-39951)
• Spec Sheet – 5-Person (K-39950)
• Kohler Sauna Warranty

FAQ

Does the Kohler C1 include the heater?
Yes — the FERO electric sauna heater, sauna stones, and heater guard are all included.

Can this sauna be installed in an alcove?
Yes — the C1 is designed for both freestanding and alcove installation, provided the space meets the required clearances and electrical requirements.

What electrical connection is required?
The 2-person and 3-person models require 240V / 30A / NEMA 6-30P. The 5-person model requires 240V / 50A / NEMA 6-50P. A licensed electrician must install the circuit.

Is flooring included?
The sauna can be configured with spruce flooring or no floor, depending on the selected variant.

Is installation included?
Professional installation is available as an optional add-on — select "Professional Installation" from the variant options above.

Does this ship for free?
Yes — free freight shipping is included to the contiguous United States. Delivery is curbside by appointment.

What is the warranty?
The Kohler C1 includes a 5-year limited warranty for consumer use, passed through in full by Prime Regeneration as an authorized Kohler retailer.