Finlandia Sauna Heaters

Yes. Finlandia electric heaters are imported directly from Harvia in Finland. While the exterior branding is Finlandia, the internal components, electrical elements, and UL-listing certifications are identical to Harvia’s professional series. This ensures that replacement parts are widely available and easily sourced across the US.

This is a high-limit safety switch required by US safety codes. If the sauna room exceeds safe temperatures or if the sensor is incorrectly mounted, the heater will trip this switch to prevent overheating. You can manually reset the heater by pressing the button located on the bottom of the junction box after the unit has cooled.

No. The FLB series is designed with built-in manual knobs at the base. If you prefer a digital wall-mounted interface, you must select the FIN series, which is specifically engineered for use with external control boxes like the Xenio or F-1T. Converting an FLB model to a digital control system later is not technically feasible.

This depends on your specific control system. While the 240V heating elements themselves only require two hot wires and a ground, modern digital controllers like the Xenio often require a neutral wire to power the low-voltage logic boards. We suggest verifying your electrical feed before finalize your heater selection.

In the US, Finlandia typically provides a 1-year warranty on all parts and a 5-year factory labor warranty if the unit is serviced at their Portland, Oregon facility. We emphasize that the warranty remains valid only if the initial installation was performed by a licensed electrician.

Absolutely not. We warn that chemicals in pool water or the salinity in salt water will rapidly corrode the high-grade stainless steel heating elements and the internal shell. Only fresh tap water or filtered water should be used to create steam.

On digital models, a persistent red light or error code typically indicates a fault with the temperature sensor or the high-limit switch. We recommend checking if the sensor bulb is mounted too close to the ceiling or directly above the heater, as this can cause a safety lockout.

The primary distinction is the control interface. The FLB series features built-in manual timer and thermostat knobs at the base of the heater. The FIN series has no on-unit controls and must be paired with an external wall-mounted digital or mechanical panel for operation.

For accurate thermal monitoring, the sensor or thermostatic bulb should be mounted on the wall roughly 6 inches below the ceiling and 12 inches to the side of the heater. Mounting it directly above the heater will cause the thermostat to cycle off before the room reaches the target temperature.

Most Finlandia units are dual-rated for 240V residential and 208V commercial power, though the amperage draw will vary. We require that your electrician verifies the wiring diagram inside the heater cover, as using the incorrect voltage for your element type can result in insufficient heat or damage.

We often find the culprit is a tripped high-limit sensor or stones that are packed too tightly, which restricts necessary airflow. If the unit has power but no heat, check the reset button on the base or inspect the heating elements for any signs of failure or burnout.

For residential use, we recommend an annual inspection. If you find the stones are cracking or turning to dust at the bottom of the tray, they must be replaced. Degraded stones block ventilation, which is the leading cause of premature heating element failure.

Yes. If only one coil fails to glow, you can replace that specific element rather than the entire heater. Since Finlandia utilizes Harvia components, replacement elements like the ZSL-313 are readily available in the US and can be swapped out by a qualified electrician.

Yes. On FLB models, this is typically the mechanical timer. On digital models, a distinct click is the sound of the contactor—the heavy-duty internal switch—engaging power to the elements. Continuous or rapid clicking may indicate a faulty contactor or loose wiring.

If the sauna fails to reach peak temperature, we suggest visually inspecting the coils while the unit is on. All elements should glow a dull red; if one remains dark, it has likely failed. Replacing individual coils is a cost-effective way to restore full power to your heater.

If the heater has been idle, it is usually just dust burning off. However, if it persists, check for stone debris that may have fallen onto the electrical connections at the bottom. We find that crumbling stones can sometimes create a short circuit or a persistent "burnt stone" odor.

No. Operating the heater without stones will cause the elements to overheat rapidly, potentially warping the stainless steel casing and tripping the safety reset. The stones are essential for storing thermal energy and protecting the elements from direct air exposure.

This feature on FLB mechanical timers allows you to preset the heater to turn on later. The dial is split: one section for immediate 60-minute heating and another for a 1-to-8 hour delay. We find users often accidentally set it to "delay" and believe the unit is not functioning.

Yes. All Finlandia heaters are UL or ETL tested and listed for the US market. This is critical for residential insurance compliance and ensures the unit has passed rigorous safety standards for high-heat environments.

Not without a major technical overhaul. The internal wiring of the FLB series differs significantly from the FIN series. Switching to a digital Xenio controller usually requires a separate contactor box and complex rewiring, which we find is often more expensive than purchasing a new FIN-series heater.

A standard 6kW Finlandia heater, such as the FIN-60, requires approximately 45 lbs of stones. We emphasize using only high-quality Vulcanite or Olivine stones, as these are engineered to expand and contract without exploding or crumbling under extreme thermal stress.