Harvia K12.5G Club Sauna Heater | 12.5kW | 240V/208V Floor-Mounted
- Authorized Retailer of Harvia
- Full Manufacturer Warranty Included
- UL Tested & ETL Certified Sauna Heater
- Financing Options Available
- U.S.-Based Customer Support
- Free Freight Shipping to the Contiguous U.S.
Harvia K12.5G Club 12.5kW Floor-Mounted Electric Sauna Heater
High-Output Floor-Standing Sauna Heater for Rooms 494–742 cu ft | 240V 1-Phase or 208V 3-Phase | Made in Finland
The Harvia K12.5G Club is a 12.5kW floor-mounted electric sauna heater built for large residential and commercial sauna rooms from 494 to 742 cubic feet. Staying true to Harvia’s deep Finnish roots, the K12.5G combines exceptional modern craftsmanship with the age-old tradition of Finnish sauna bathing — delivering intense, pleasant heat quickly and efficiently.
Deluxe stainless steel interior and exterior construction, a large stone compartment with direct element-to-stone contact, and multi-layer construction for cooler exterior surface temperatures make the K12.5G a trusted choice for homes, health clubs, hotels, and day spas. Available in 240V single-phase and 208V 3-phase configurations — select your voltage above. An external control unit and sauna stones are required for operation and are sold separately.
Who This Is For
The K12.5G Club is ideal for large home sauna rooms and commercial installations between 494 and 742 cubic feet. It sits between the K10G (353–565 cu ft) and K15G (600–989 cu ft) in the Club Series lineup. Choose 240V single-phase for standard residential service; choose 208V 3-phase for commercial buildings or facilities with 3-phase power.
Key Features
- 12.5kW floor-mounted electric output — designed for sauna rooms 494–742 cu ft
- Available in 240V single-phase and 208V 3-phase configurations
- Deluxe stainless steel interior and exterior construction
- Multi-layer construction for cooler surface temperature and greater safety
- Large stone compartment — 132 lbs minimum; stones make direct contact with heating elements
- Generates intense, penetrating heat quickly and efficiently
- Compatible with select Harvia Xenio and Fenix external controls (sold separately)
- Optional 24-hour time clock
- UL tested and listed; ETL certified — meets U.S. safety standards
- Designed, engineered, and manufactured in Finland
Specifications
- Model: Club K12.5G
- Series: Harvia Club Series
- Power Output: 12.5kW
- Voltage: 240V (1-Phase) or 208V (3-Phase) — select variant above
- 240V / 1-Phase Amperage: 52.7A (2 circuits required) — SKU: HRKGU12CU1UL
- 208V / 3-Phase Amperage: 34.1A — SKU: HRKGU12CU3UL
- Room Size: 494–742 cu ft
- Stone Capacity: 132 lbs minimum (3 boxes)
- Width: 19-7/8” (505 mm)
- Depth: 16.9” (429 mm)
- Height: 27.6” (701 mm)
- Heater Weight: 60 lbs
- Shipping Weight (with stones): 192 lbs
- Safety Listing: UL Tested & ETL Certified
- Country of Origin: Finland
Required Components Sold Separately
- Sauna Control (required — choose one):
- Sauna Stones (required): 132 lbs minimum (3 boxes) — Harvia AC3000 Split-Face Sauna Stones 5–10cm recommended. Natural stones vary in shape and size; an additional box is recommended to allow selection of the highest quality stones for fit, form, and function.
- Electrical Service (required): 240V / 1-phase / 52.7A (2 circuits) or 208V / 3-phase / 34.1A — consult a licensed electrician
What’s Included
- Harvia K12.5G Club 12.5kW Sauna Heater
- Installation and Operation Manual
- Warranty documentation
Shipping & Delivery
This product ships free via freight to the contiguous United States. Shipping weight with stones is 192 lbs. Please inspect your shipment upon arrival and note any visible damage before signing.
Installation Notes
- 240V / 1-phase: requires two dedicated circuits totaling 52.7A — consult a licensed electrician
- 208V / 3-phase: requires a dedicated 34.1A circuit — consult a licensed electrician
- An external Harvia control system is required and must be installed separately
- Sauna stones must be loaded before first use — minimum 132 lbs required for warranty to remain valid
- Electrical connection must match heater and control specifications
- Follow all manufacturer safety clearances and local code requirements
- Review all installation documents before purchase and installation
- Professional installation strongly recommended
Warranty
The Harvia K12.5G Club includes a 1-year limited manufacturer warranty for both residential and commercial use. Proper stone maintenance is required for the warranty to remain valid — see the manufacturer’s stone requirements guide. As an authorized Harvia retailer, Prime Regeneration ensures full warranty coverage is passed through to you at the time of purchase. View Full Warranty Document.
Manuals & Documentation
- Installation & Operation Manual
- Technical Data Sheet (K12.5G 1PH)
- Technical Data Sheet (K12.5G 3PH)
- Element Requirements
- Stone Requirements Guide
- Harvia Sauna Stones Update
Complete Your Sauna Setup
- Harvia Xenio Digital Control w/WiFi (up to 17kW) — required
- Harvia Digital Control w/WiFi — Club Series — required (alternative)
- Harvia AC3000 Split-Face Sauna Stones — 3 boxes required (132 lbs min)
- Shop All Sauna Heaters
FAQ
What is the difference between the 240V 1-phase and 208V 3-phase variants?
Both deliver 12.5kW of output for rooms 494–742 cu ft. The 240V 1-phase variant draws 52.7A across two circuits and is the standard residential configuration. The 208V 3-phase variant draws 34.1A and is common in commercial buildings. Consult a licensed electrician to confirm which is appropriate for your installation.
What size sauna room does the K12.5G support?
The K12.5G Club is rated for sauna rooms from 494 to 742 cubic feet. Use the Harvia Sizing Guide to confirm the right heater for your room.
Which control is compatible with the K12.5G?
The K12.5G Club is compatible with the Harvia Xenio Series Digital Control w/WiFi (up to 17kW) and the Harvia Digital Control w/WiFi for Club Series. An external control is required for operation.
How many sauna stones does it require?
A minimum of 132 lbs (3 boxes) of sauna stones are required and sold separately. Natural stones vary in shape and size — an additional box is recommended. Proper stone maintenance is required for the warranty to remain valid.
Does this ship for free?
Yes — free freight shipping is included to the contiguous United States.
Are financing options available?
Yes — financing options are available at checkout. Contact us for details.
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Harvia K12.5G Club Sauna Heater | 12.5kW | 240V/208V Floor-Mounted Review Summary
What people like
Pros
- Durable Stainless Construction: The unit features high-quality, corrosion-resistant stainless-steel components designed for long-term reliability and heavy-duty, frequent use.
- High Stone Capacity: It utilizes a massive 132-lb stone bed that ensures consistent heat distribution and authentic, intense steam generation.
- Commercial Grade Performance: Engineered for high-demand environments, it provides rapid heat-up times and is capable of maintaining stable temperatures during extended sauna sessions.
- Safe Multi-layer Design: The construction includes protective multi-layer siding that helps maintain lower external surface temperatures for increased safety.
Cons
- Separate Controls Required: The unit necessitates an external control system (such as the Xenio series) which is not included with the heater purchase.
- Stones Sold Separately: A significant amount of sauna stones (minimum 132 lbs) must be purchased independently to operate the unit.
- High Electrical Demand: The 12.5kW output requires substantial power capacity, necessitating professional electrical installation for residential setups.
- Large Physical Footprint: Its industrial design and size require a dedicated floor space, which may be limiting for smaller or space-constrained sauna rooms.
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