Title: KOHLER C1 Traditional Indoor Sauna — 2, 3 or 5 Person, Graphite Grey, Floor Optional

Description

The KOHLER C1 is a traditional Finnish-style indoor sauna built around a freestanding FERO electric heater and natural sauna stones. Water ladled over the hot stones releases löyly — the soft burst of steam that defines Nordic sauna bathing, and the reason a stone-and-heater sauna feels different from a cabinet that only radiates dry heat. The C1 is offered in two-, three- and five-person cabins, in a Graphite Grey or Scandinavian Spruce exterior, with or without the integrated floor. Every size arrives in pre-built sections that pass through ordinary interior corridors and doorways.

Inside, every cabin is lined in Scandinavian spruce. The bench is solid obeche, 22-7/8" (580 mm) deep — deep enough to sit back into or lie along — with a matching obeche backrest, headrest and stool. Obeche is used on the contact surfaces for the same reason Finnish builders have always chosen low-density hardwoods there: it carries heat poorly, so it stays comfortable to sit on at full operating temperature.

The FERO heater stands free on the floor behind an obeche railing rather than hanging on a wall. Two- and three-person cabins use a 4.5 kW heater on a 30-amp circuit; the five-person cabin steps up to 9 kW on a 50-amp circuit to bring the larger volume up to temperature.

The cabin is insulated with 2-1/8" (54 mm) of mineral wool and joined tongue-and-groove through the walls, floor and roof. The entry door is 5/16" (8 mm) tempered glass on matte aluminum hinges with a rubber seal, and carries back-to-back 10-5/8" (270 mm) beech handles that stay cool to the touch. In keeping with sauna safety practice, the C1 door has no locking system of any kind — it opens from inside at any moment.

Heat is managed by a dual thermostat arrangement and a digital control panel that mounts externally on the front of the cabin, so the controls are set before entering and stay out of the heat. Aerotherm ventilation moves air through the cabin during use. Lighting is indirect 2700K warm white behind the backrest. A wall-mounted thermometer and a beech wood 20-minute hourglass sand timer sit inside the cabin — analog instruments that need no power and do not fail in the heat.

The floor option matters more than it sounds. Ordered with the floor, the C1 installs on any level surface. Ordered without, it sits directly on the finished floor, and Kohler specifies cement, tile or another non-water-absorbent surface for that configuration. The matching floor kit can be added later.

The C1 is designed for indoor installation and is listed by Intertek (ETL) to UL 875 and CSA C22.2 No. 164. No plumbing connection is required.

Included with every C1: cabin, FERO heater with sauna stones, digital control panel, bench, backrest, backrest lighting, headrest, stool, thermometer, sand timer and all installation hardware — plus the floor on models ordered with the floor kit.

Specifications by size

Common to all sizes: 50/60 Hz on one dedicated circuit with Class A GFCI · controller model 21028 T · 9'10" (2.9 m) cord exiting top rear · 2-1/8" (54 mm) mineral wool insulation · 5/16" (8 mm) tempered glass door, no locking system · 22-7/8" (580 mm) deep obeche bench · 2700K warm white indirect Sunset LED lighting · Aerotherm ventilation · Scandinavian spruce, obeche and beech, tempered glass, matte aluminum hinges · freestanding or alcove installation · ETL listed to UL 875 and CSA C22.2 No. 164 · no plumbing required.

Finishes: Graphite Grey (CGS) or Scandinavian Spruce (SPS) exterior. Interior is Scandinavian spruce in both.

Site readiness

• Minimum 2" (50 mm) clearance between the sauna and any site wall
• Minimum 8' (2.4 m) ceiling height
• Floor must support 58.9 lbs/ft² plus dynamic loads
• One dedicated circuit — 30 A for 2- and 3-person, 50 A for 5-person — protected by a Class A GFCI (residual current device I∆N ≤ 0.03 A with at least a 0.04" / 3 mm contact gap). Electrical work by a licensed electrician.
• No plumbing connection required
• Delivered on one or two pallets by lift-gate truck, in sections; minimum two people to move and assemble; hardware included; professional installation recommended
• Alcove installations carry additional ventilation requirements. A fan is required on exhaust ducts longer than 12' (3.66 m) or using more than two elbow joints, and that fan must not exceed 40–50 cfm.
• Operating environment: 32–104 °F (0–40 °C), relative humidity max 80%

Safety and care

Do not use the C1 cabin or heater outdoors — the C1 is designed for indoor use. Do not operate where aerosol products are in use or where oxygen is being administered. Use a towel or mat on the bench. If the sauna goes unused, run a heat cycle roughly every six weeks. Use only KOHLER aromatic extracts, approximately 10 drops per liter (0.26 gal) of water.

⚠ WARNING: This product may expose you to chemicals (e.g. nickel). Of these, nickel is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Warranty

Covered by the KOHLER Sauna Limited Warranty: five years on the sauna against defects in material and workmanship under normal residential use, from date of purchase or delivery, for the original purchaser, in the United States and Canada. Sauna accessories — whether included with the sauna or purchased separately — carry a one-year limited warranty. The warranty is void if the product is installed in a commercial application. Heater stones and electrician costs are not covered. Original sales receipt required.

Accessories

• Floor kits: K-34275 (2P) · K-35693 (3P) · K-35694 (5P)
• Roof kits: K-39193 (2P) · K-39194 (3P) · K-39195 (5P)
• Aromatic extracts: 39814-A4 Recharge · 39814-A1 Sleep · 39814-A2 Breathe · 39814-A6 Relax