Finnleo Designer SL2 6.0 kW (240V 1PH) Sauna Heater

Finnleo Designer SL2 6.0 kW (240V, 1PH) Sauna Heater

The Finnleo Designer SL2 6.0 kW is a compact, wall-mounted electric sauna heater engineered to deliver fast, penetrating, and consistent heat for mid-sized home and light-commercial saunas. Built in Finland with rust-resistant steel construction and safety-tested for wet environments, the SL2 6.0 kW heats rooms from 175 to 300 cubic feet, making it the ideal middle option in the three-model Designer SL2 lineup (4.5 kW, 6.0 kW, and 8.0 kW). Its space-saving wall-mount design keeps the sauna floor clear, giving your room a clean, modern look while the heater holds up to 50 lbs of sauna rocks in direct contact with the heating elements for a powerful, authentic Finnish sauna experience.

Key Features

• Space-saving wall-mounted design that keeps the sauna floor open and uncluttered
• Rated for saunas from 175 to 300 cubic feet
• Heater dimensions: 16"w x 11.5"d x 24"h
• Holds up to 50 lbs of sauna rocks for powerful, penetrating, reliable heat
• Runs on 240V, single-phase power
• Pairs with the SaunaLogic2 (SL2) Wi-Fi-enabled control system
• Optional BioWater Technique tank add-on for higher humidity and a softer steam experience (available exclusively on the 6.0 kW and 8.0 kW models)
• Fast heat-up time thanks to the reduced rock bed and efficient element design
• Suitable for both indoor and outdoor sauna installations
• ETL listed and safety-certified for wet, high-heat environments
• Backed by Finnleo's 5-year residential warranty

Construction & Build Quality

Every Designer SL2 heater is manufactured in Finland to exacting standards, using strong, rust-resistant steel that stands up to the humidity, heat, and repeated use inherent in sauna environments. The compact 16"w x 11.5"d x 24"h housing is engineered for wall mounting, minimizing the footprint inside the sauna room while still providing a generous rock bed for authentic, satisfying steam (löyly). The heater is UL/ETL certified, confirming it meets North American electrical and safety standards for wet-environment appliances.

SaunaLogic2 (SL2) Control System

The Designer SL2 6.0 kW pairs with the SaunaLogic2 control, a sleek, water-resistant, full-glass touchscreen display measuring just 3-3/8" wide x 5-1/2" tall x 1/4" deep. It can be mounted inside or outside the sauna and is available in Wi-Fi-enabled or standard (non-Wi-Fi) versions.

• Start, stop, and adjust heat and lighting from one sleek touchscreen
• Wi-Fi models connect to the SaunaLogic app (iOS and Android) for smartphone or tablet control from anywhere
• Delayed start scheduling up to 24 hours in advance, so your sauna is ready when you are
• Save and recall your favorite temperature and lighting settings with one-tap access
• Optional add-ons available, including mood lighting and a Bluetooth soundbar
• UL/ETL certified and safe for wet sauna environments

Optional BioWater Technique Tank

The 6.0 kW Designer SL2 is compatible with Finnleo's optional BioWater Technique tank, which generates higher levels of ambient humidity for a softer, gentler sauna heat. This add-on is available exclusively on the 6.0 kW and 8.0 kW heater models, giving 6.0 kW owners the flexibility to fine-tune their sauna experience from a drier traditional heat to a more humid, soothing session.

What's Included

• Finnleo Designer SL2 6.0 kW heater unit
• Up to 50 lbs of sauna rocks
• SaunaLogic2 control panel (Wi-Fi or standard, depending on configuration)
• CB (contactor) box
• Wiring components
• Manufacturer's 5-year residential warranty

Note: Optional add-ons such as the BioWater Technique tank, mood lighting, and Bluetooth soundbar are available separately and are not included in the base package.

Installation & Maintenance

The Designer SL2 6.0 kW must be installed by a licensed electrician to ensure proper wiring and safe operation. Maintenance is minimal: simply wipe down the heater exterior as needed and replace the sauna rocks every 1 to 3 years to maintain optimal heat transfer and steam quality.

Why Buy Finnleo

Finnleo, built by Sauna360 in Cokato, Minnesota, is one of the most trusted names in authentic Finnish sauna. Every heater is safety-tested and listed for North America, and the SaunaLogic2 ecosystem ties your heater, lighting, and audio into one seamless, app-controlled experience. Backed by an industry-leading 5-year residential warranty and friendly, Minnesota-based technical support, Finnleo delivers the quality, performance, and peace of mind that serious sauna enthusiasts expect. As an authorized dealer, we offer full factory warranty coverage, expert sizing guidance, and support before and after your purchase—so you get the right heater, sized correctly, the first time.