Finnleo Sauna Controls & Contactor Boxes

SaunaLogic2® is Finnleo's flagship digital sauna control platform — a sleek, edge-lit glass touchscreen that replaces old-fashioned mechanical timers and dial thermostats with a single intuitive interface for heat, time, lighting, and audio. On Wi-Fi-enabled models, the free Finnleo mobile app extends that control beyond the sauna room entirely: start preheating from your phone on the drive home, nudge the temperature up mid-session without leaving the bench, or schedule recurring sessions so the room is at temperature exactly when you want it, every time. Behind every SaunaLogic2 touchscreen sits a matched contactor box — the heavy-duty relay hardware that actually switches the high-current power feeding your heater on and off at the control's command, since the low-voltage touchscreen itself was never designed to carry that load directly. Get the control and contactor box correctly matched to your heater model, kW rating, and electrical service, and the result is a seamless, repeatable, app-driven sauna experience with zero guesswork and zero nuisance trips.

Match Your Control to Your Heater

SaunaLogic2 (SL2) — the original SaunaLogic2 touchscreen, engineered specifically for Finnleo's Designer SL2 and Himalaya heater lines. Offered with a 60-minute session timer in both Wi-Fi and non-Wi-Fi versions, it delivers the same crisp glass interface and precise heat control whether or not remote app access is part of the plan.
SL2-C — the control purpose-built for the Laava and Magma heater lines, available with either a 60-minute Wi-Fi timer for spontaneous, on-demand sessions or a 24-hour Wi-Fi delay timer that lets you queue up a session a full day in advance, ideal for households and facilities that plan sauna time around a fixed schedule.
SL2-IS — a dual-mode control designed for infrared and InfraSauna hybrid systems, capable of independently managing infrared panel output alongside traditional convection heat in the same cabin. Available as a straightforward 60-minute timer or upgraded with Wi-Fi for full remote app control of both heat sources.
External On/Off Switch — a compact auxiliary switch accessory for SL2-C-equipped Laava and Magma installations, adding a secondary local shutoff point for facilities, multi-user households, or code requirements that call for accessible emergency disconnect at the sauna entrance.
Contactor Boxes (CB16 / CB17 / CB18) — the relay hardware that safely carries your heater's full electrical load, sized precisely to kW draw and electrical phase so nothing runs hot or nuisance-trips:
- CB16-1 / CB16-3 — single-phase (240V) or three-phase (208V/480V) contactor boxes engineered for Designer SL2 and Himalaya heaters, switching heater power cleanly at the control's command.
- CB17-1 / CB17-3 — single-phase or three-phase contactor boxes sized for the higher-output Laava and Magma heater lines, built to handle their larger kW draw without derating.
- CB18-1 / CB18-3 — dual-heater add-on boxes, in single-phase or three-phase versions, that pair directly with a CB17 to run two heaters off one SL2-C control — the standard configuration for larger custom cabins and commercial installs.

Not sure which control and contactor box your heater needs? Send us your heater model, kW rating, and electrical service (single-phase or three-phase, voltage), and we'll confirm the exact pairing before you order — so the parts that arrive at your door are the parts that actually fit your cabin's wiring.

Why Buy Finnleo From Us

Finnleo, manufactured by Sauna360 in Cokato, Minnesota, is one of the most respected names in authentic Finnish sauna in North America, with decades of heater and control engineering behind every product it ships. Every Finnleo heater is safety-tested and listed to North American electrical standards, and the SaunaLogic2® ecosystem ties heater, lighting, and audio into a single app-controlled experience built for years of daily reliability, not just showroom polish. As an authorized Finnleo dealer, we back every order with full factory warranty coverage, hands-on sizing help matched to your specific heater and electrical service, and support that continues well past checkout. If you have a question about fit, voltage, phase, or lead time, reach out and a sauna specialist will help you spec it correctly the first time — no mismatched parts, no rewiring, no surprises on install day.