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Kohler C1 Indoor Graphite Grey Sauna Kit

by Kohler
Save $8,702.94 Save $5,200.00
Original price $20,800.00
Original price $20,800.00 - Original price $32,152.94
Original price $20,800.00
Current price $15,600.00
$15,600.00 - $26,350.00
Current price $15,600.00
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Available Sizes: Up to 2 People
Flooring Options: No Floor
Upgrade Option: No Upgrade

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Free shipping to the lower 48 US States, no sales tax, and fast dispatch within 1-3 days.

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Fast and Reliable Delivery: Receive your order within 4-7 business days.

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Kohler C1 Graphite Grey 2-5 Person Indoor Sauna Kit

The Kohler C1 in Graphite Grey takes spa-quality sauna design and gives it a striking modern edge. The exterior is finished in deep Graphite Grey, transforming the cabin into an architectural statement piece sleek, refined, and unmistakably contemporary while the interior keeps the warm, welcoming character of premium Scandinavian spruce. Available in 2-, 3-, and 5-person configurations with freestanding or alcove installation, the C1 Graphite Grey adapts to your space rather than the other way around.

Graphite Grey exterior, premium spruce interior

The deep Graphite Grey exterior is built to integrate into modern interiors dark, sophisticated, and architectural in feel. Step inside and the atmosphere shifts entirely: warm, welcoming Scandinavian spruce walls and ceiling envelop the space. The obeche wood bench and matching backrest are paired with 2700K warm white indirect lighting positioned behind them soft, gentle illumination that doesn't fight with the heat for your attention. Tongue-and-groove walls and connections create a clean, seamless appearance throughout.

Built for serious heat retention

The C1 doesn't compromise on thermal performance. 0.3" tempered glass door and windows pair with 2.1" thick mineral wool insulation between the walls and rubber seals at every joint, locking heat in for consistent, long sessions. A FERO freestanding electric heater with sauna stones and a heater guard delivers traditional Finnish-style steam, while dual thermostatic control ensures every session is safe and repeatable.

Smart controls and ventilation done right

An externally mounted digital control panel handles temperature, session time, and backrest lighting no need to interrupt your session to adjust settings. The Aerotherm ventilation system maintains a steady supply of fresh oxygen and proper air exchange throughout your session, so the air stays breathable even at peak heat. Beech wood door handles stay cool to the touch, and the freestanding-or-alcove design works for almost any indoor layout.

Striking Graphite Grey exterior, premium Scandinavian spruce interior, FERO electric heater, and tempered glass detailing the Kohler C1 Graphite Grey brings architectural sauna design into modern homes. Available in 2-, 3-, and 5-person sizes with freestanding or alcove installation. Backed by Kohler's 150+ year heritage and 5-year limited warranty.
2, 3, or 5 person sizes Indoor use Graphite Grey exterior Scandinavian spruce interior FERO electric heater Tempered glass door & windows Freestanding or alcove 5-year limited warranty

Specifications

2-Person dimensions (K-39950)

Width 65-3/8" (1,661 mm)
Depth 46-1/8" (1,172 mm)
Height 83-1/2" (2,121 mm)
Capacity Up to 2 people

3-Person dimensions (K-39951)

Width 77-3/16" (1,961 mm)
Depth 54" (1,372 mm)
Height 83-7/16" (2,119 mm)
Capacity Up to 3 people

5-Person dimensions (K-39963)

Width 81-1/8" (2,061 mm)
Depth 77-5/8" (1,972 mm)
Height 83-1/2" (2,121 mm)
Capacity Up to 5 people

Construction & materials

Exterior finish Graphite Grey
Interior walls Premium Scandinavian spruce
Bench & backrest Obeche wood
Door & windows 0.3" (8 mm) tempered glass
Door handle Beech wood (cool-touch)
Heater safety rail Obeche wood
Insulation 2.1" (5.4 cm) mineral wool
Floor type Spruce or No Floor (option)
Lighting 2700K warm white indirect
Ventilation Aerotherm system

Electrical & heater

Heater FERO freestanding electric
Heater fuel Electric
Heater voltage 220–240V
Heater frequency 50/60 Hz
Heater safety distance 1.6" (4 cm)
Sauna room voltage 240V
Cord length 9' 10" (2.9 m)
Cord location Top rear
Control External digital panel

Installation & clearance

Installation method Freestanding or alcove
Wall clearance 2" (5 cm) minimum
Ceiling clearance 8' (2.4 m) minimum
Flooring Full Floor or No Floor (option)
Installation DIY or Professional
2-Person (K-39950)
Kohler C1 2-person sauna dimensions diagram
3-Person (K-39951)
Kohler C1 3-person sauna dimensions diagram
5-Person (K-39963)
Kohler C1 5-person sauna dimensions diagram

What's included

Front frame panels
Side wall panels
Rear wall panels
Ceiling elements
Bottom frame
Backrest
Benches
FERO electric sauna heater
Heater guard
Sauna stones
Digital control panel
Indirect lighting (2700K)
Wall-mounted thermometer
Beech 20-minute hourglass timer
Headrest
Stool
Installation hardware
Installation & operation manual

Why the Kohler C1 stands out

Premium Scandinavian spruce

Both interior and exterior built from premium spruce. Warm, welcoming atmosphere with the kind of grain and character only premium European softwood delivers.

FERO electric heater

Freestanding FERO heater with sauna stones and heater guard provides traditional Finnish-style heat. Reliable, efficient, and built for daily residential use.

Indirect 2700K lighting

Warm white indirect lighting positioned behind the backrest creates a gentle, relaxing atmosphere — never harsh, never distracting from the experience.

Aerotherm ventilation

Engineered ventilation ensures adequate oxygen supply and air exchange throughout your session. Air stays breathable even at peak heat.

Mineral wool insulation

2.1" thick mineral wool insulation between every wall, paired with rubber seals and tempered glass, locks heat in for consistent thermal performance.

Freestanding or alcove

Designed to install either freestanding in a room or built into an alcove. The C1 fits where you want it, with a 2" minimum wall clearance.


About Kohler

Kohler C1 5-person Graphite Grey indoor sauna
Heritage you can trust

150+ years of bathroom and wellness craftsmanship

Founded in 1873, Kohler is one of the most recognized names in bathrooms, wellness, and home design worldwide. The C1 sauna brings that heritage of premium materials, refined engineering, and meticulous finish into the sauna category combining traditional Finnish-style heat with the contemporary build quality Kohler is known for.

  • Graphite Grey exterior — modern, architectural, contemporary
  • Premium Scandinavian spruce interior — tongue-and-groove, warm character
  • FERO electric heater — sauna stones, heater guard, traditional steam
  • Tempered glass detailing — 0.3" door and windows, beech wood handle
  • Smart controls — external digital panel, dual thermostatic control
  • 5-year limited warranty — backed by Kohler directly
About Kohler

Built for the home, engineered for performance

Kohler designs every product with the same philosophy: premium materials, considered engineering, and finishes that last. The C1 sauna is no exception it's a wellness fixture built to spa-grade standards but designed for the realities of residential installation, daily use, and long ownership.

From the freestanding-or-alcove flexibility to the multiple size and floor options, the C1 represents what happens when a brand with deep heritage takes the sauna category seriously: a product that's adaptable, beautiful, and built to outlast trends.

Kohler C1 2-person Graphite Grey indoor sauna

Manuals & Documents

Everything you need before and after installation

Download the official Kohler C1 manuals, spec sheets, and warranty documentation below. The Installation and Operation Manual is the most important review it before your delivery arrives so you know what to expect on installation day. A licensed electrician is required for the heater installation.

Installation & Operation Manuals
Spec Sheets — No Floor
Spec Sheets — Full Floor
Additional Documents

Warranty

Kohler 5-year Limited Warranty

Every Kohler C1 sauna is backed by Kohler's 5-year limited warranty for residential use, covering defects in materials and workmanship from the date of purchase as long as the original purchaser owns the product. Kohler accessories included with the sauna are covered for 1 year under the same terms. Kohler will, at its election, repair or replace defective product covered by the warranty when inspection discloses defects occurring under normal usage. Damage caused by accident, misuse, abuse, improper installation, or commercial use is not covered. Proof of purchase from an authorized dealer is required for any claim and we are an authorized Kohler dealer.

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. Restock fees will be deducted in amounts ranging from 15% to 25% of the value of the item being returned. The minimum restock fee on lower-value orders will be $15.
To start a return, you can contact us at support@mediriser.com

At Medriser, we're committed to ensuring your order reaches you in a timely manner. Our shipping policy guarantees that your order will be processed and dispatched within 1-2 business days from the date of purchase. Once your order is shipped, you can expect it to arrive at your doorstep within 3-5 business days. We partner with reliable shipping carriers to ensure safe and efficient delivery of your medical supplies and healthcare products. For any inquiries regarding your order status or shipping, please don't hesitate to contact our customer care team for assistance.

Payment Policy:
Medriser offers convenient payment options to make your shopping experience seamless. We accept major credit cards, including Visa, Mastercard, American Express, and Discover, as well as PayPal for secure online transactions. Your payment information is encrypted and protected to ensure your privacy and security. For any payment-related inquiries or assistance, please feel free to reach out to our customer care team. We're here to help make your purchase process as smooth and hassle-free as possible.

Our Price Matching Policy

At Mediriser, we are dedicated to offering you the most competitive prices online. We maintain strong partnerships with our suppliers to establish minimum advertised pricing guidelines for all our competitors. This means that every other online store selling the same product is expected to offer it at the same price.

Price Match Guarantee

If, within 14 days of your purchase, you discover another online store offering a lower price for the same product, please bring it to our attention. We will promptly contact the brand to ensure they comply with the minimum advertised price policy. If you qualify for a refund, we will credit the price difference back to your credit card.

Your Confidence Matters

We want you to shop with absolute confidence, knowing that you are receiving the best possible price for the product. If you find that our own website has reduced the price of the item you ordered within 14 days of your purchase, we will also refund the price difference.

Requesting Your Partial Refund

To request a partial refund, simply follow these steps:

Email us at support@mediriser.com with links to the product on both our website and the other dealer's website where you found the price difference.

Ensure that you make this request within 14 days from the date of your order.

We will process the credit accordingly and ensure that you receive the best deal possible.

Limitations of Our Price Match Guarantee

While we are committed to providing competitive pricing, our Price Match Guarantee does come with certain limitations:

You must purchase the item from our website before requesting the Price Match Guarantee.

Promotions such as rebates, holiday sales, and "buy one, get one free" offers do not qualify.

The item must be in stock on the competitor's website and be sold as brand new.

The competitor must be an online store and may not have a physical retail location.

The website in question cannot be a discounter or auction site (e.g., eBay, Overstock, Walmart, Amazon, etc.).

The competitor must be an Authorized Retailer of the product.

Our Price Match Guarantee includes both the item price and shipping charges but excludes sales tax.

Contact Us for Price Match Inquiries at support@mediriser.com

If you have any questions or wish to confirm whether we can price match a product before making your purchase, please reach out to us. We are here to assist you in securing the best deals on the products you need. Your satisfaction and savings are our top priorities at Mediriser.

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