Harvia Club KG12G-U3W 12KW Sauna Heater - Finnish Sauna Builders

Product Overview

The Harvia Club KG12G-U3W (K125G-U3-NC) is a powerful 12.5kW commercial-grade electric sauna heater engineered for high-demand environments. Built for large home saunas, fitness clubs, spas, hotels, and wellness centers, this floor-standing heater delivers strong, even, and reliable heat for rooms between 494 and 742 cubic feet.

Constructed entirely from corrosion-resistant stainless steel and equipped with industrial-grade heating elements, the KG12G-U3W is designed for continuous use and long service life. Operating on 208V 3-phase power, it requires a compatible external control system and contactor/power unit (sold separately), allowing full customization and precise control. Made in Finland and UL Listed, this heater represents elite-level Finnish sauna engineering built for performance, safety, and durability.

Key Features

• 12.5kW Commercial Output – Efficiently heats large sauna rooms 494–742 cu. ft.

• Fully Stainless Steel Construction – Industrial durability for continuous operation.

• High Stone Capacity – Holds 135 lbs of sauna stones for extended heat retention and smoother steam.

• Robust Heating Elements – Industrial-grade stainless steel ensures reliable long-term performance.

• Floor-Standing Design – Stable and ideal for professional installations.

• Flexible Control Compatibility – Works with Xenio CX45 digital controls or F-2T & FX503 mechanical controls (sold separately).

• UL Listed – Certified for safe commercial operation.

• Made in Finland – Genuine Finnish craftsmanship and engineering.

Specifications

• Model: Harvia Club K125G-U3-NC

• Power Output: 12.5 kW (12,300 watts)

• Sauna Room Size: 494–742 cu. ft.

• Voltage / Phase: 208V / 3-Phase

• Amperage: 34.1A

• Main Breaker: 40A

• Wiring (Heater to Power Unit): (3) #8 conductors + Neutral + Ground

• Control Wiring: (2) #14 conductors + Ground

• Heater Dimensions (W x D x H): 19 7/8" x 17" x 27 1/2"

• Stone Capacity: 135 lbs (stones sold separately)

• Construction: All stainless steel housing & heating elements

• Certifications: UL Listed

• Country of Manufacture: Finland

• Heater Weight: 60 lbs

• Shipping Weight (with stones): 192 lbs

Why Choose the Harvia Club KG12G-U3W?

For commercial facilities or larger residential saunas that demand uninterrupted performance, the KG12G-U3W delivers unmatched reliability. Its fully stainless steel construction, heavy-duty heating elements, and large stone capacity ensure exceptional heat stability and long-lasting durability. Backed by Harvia’s decades of Finnish sauna expertise, this model sets the standard for high-output, professional-grade sauna heating.

What's Included

• Harvia K125G-U3-NC 12.5kW Electric Sauna Heater

• Mounting Hardware

• Installation & User Manual

• UL Certification Label

Note: External control system and sauna stones are sold separately.

Warranty & Support

Harvia provides robust commercial-grade warranty coverage and support, ensuring confidence and long-term reliability. Full details are included in the product manual.