Features
Finlandia FIN-45S Series 4.5kW 240V/208V Electric Sauna Heater
- 240V/1PH operation with CX170 or F1T control
- 208V/3PH operation with CX170 control or F2T control with FX303 contactor
- 24-hour operation with CX170 control and 24H7D time clock or F2 control with FX303 contactor and 24H7D time clock
- Wall-mounted
- Stainless steel elements
- Requires wall-mounted time/temperature control
- Requires a contactor with F2 and F-2T controls
- Available in 240V/1PH and 208V/3PH operation
- Stainless steel construction
- Optional stainless steel exterior
- Industrial grade, serviceable heating elements
- Exceptionally large rock capacity
- Direct rock-to-heating element contact
- Dimensions: 16"W x 11"D x 24"H
Specifications
| Finlandia FIN-45S Series 4.5kW 240V/208V Electric Sauna Heater |
| Model |
FIN-45S |
| Kilowatt Rating |
4.5kW |
| Cubic Feet Minimum |
100 CF |
| Cubic Feet Maximum |
210 CF |
| Heater Weight |
40 lbs |
| Shipping Weight with Sauna Stones |
90 lbs |
| Nominal Amperage (240V, Single Phase) |
18.8 Amps |
| Nominal Amperage (208V, 3-Phase) |
12.5 Amps |
| Recommended Minimum Copper Wire Supply (240V, Single Phase) |
10 AWG |
| Recommended Minimum Copper Wire Supply (208V, 3-Phase) |
14 AWG |
| Width |
16" |
| Depth |
11" |
| Height |
24" |
Includes
- Sauna Heater
- 45 lbs of Igneous Sauna Stones
- Installation and Operation Manual
- Manufacturer Warranty
Manual
Warranty
Description
Product Highlights
The FIN-45S is a wall-mounted electric sauna heater built for rooms that need real, sustained output rather than a light warm-up. Key features include:
- Model FIN-45S, rated at 4.5kW
- Heats rooms from 100 to 210 cubic feet
- Wall-mounted installation
- Stainless steel heating elements
- Stainless steel internal construction
- Triple-wall construction for lower exterior surface temperature
- Direct rock-to-element contact for efficient heat transfer
- Ships with 45 lbs of igneous sauna stones
- Dimensions: 16 inches wide by 11 inches deep by 24 inches high
- Heater weight: 40 lbs (90 lbs shipping weight with stones included)
- Available in 240V/1PH or 208V/3PH configurations
- UL and ETL listed
- Backed by a limited lifetime warranty
- Manufactured by Harvia and imported from Finland
- Control sold separately and required for operation
Why Choose the Finlandia FIN-45S Sauna Heater?
Most electric sauna heaters in this price range are sealed consumer units, meant to be replaced rather than repaired once something fails. The Finlandia sauna heater is built differently. It comes from Harvia, manufactured in Finland, and put together with the expectation that it will be serviced, not swapped out.
That shows up in the details. The heating elements are industrial grade and replaceable, so a worn element doesn't mean buying a new heater. The elements and internal construction are stainless steel, which resists the corrosion that shortens the life of cheaper units exposed to repeated water contact.
The FIN-45S electric sauna heater is backed by a limited lifetime warranty and is UL and ETL listed, making it a dependable choice for both residential and commercial sauna installations. It's designed to meet performance and safety requirements rather than simply prioritize appearance.
Sizing the FIN-45S: 100 to 210 Cubic Feet
The FIN-45S is rated for saunas between 100 and 210 cubic feet. Since most people know their sauna in feet rather than volume, the math is simple: multiply length by width by height.
A few examples make it concrete:
- A 6 by 5 foot room with a 7-foot ceiling comes to 210 cubic feet, right at the top of the range.
- A 5 by 4 foot room at 7 feet comes to 140 cubic feet, comfortably in the middle.
- A 4 by 4 foot room at 7 feet comes to 112 cubic feet, near the lower end.
Room volume is only part of the sizing equation. Uninsulated walls, glass doors, large windows, and masonry or tile surfaces allow more heat to escape, increasing the heating demand placed on the sauna heater. A room that sits near the top of the range with a full glass front may need to step up to the next FIN series size rather than running the FIN-45S at its limit.
For a more precise read on a specific room, use the sauna heater size calculator available on our site. If a room falls outside the 100 to 210 cubic foot range, the smaller and larger heaters in the FIN series cover those cases.
240V and 208V Wiring and Control Requirements
The FIN-45S does not run out of the box. It requires a wall-mounted time and temperature control, purchased separately, and the right one depends on which voltage configuration is ordered.
- For 240V single phase, choose the CX170 or the F1T.
- For 208V three phase, choose the CX170, or the F2T paired with an FX303 contactor.
- Manual F-2 and F-2T controls need a contactor to operate.
- The digital control ships with its own power supply.
The electrical specifications differ by configuration as well:
| Specification |
240V Single Phase |
208V Three Phase |
| Nominal Amperage |
18.8 A |
12.5 A |
| Minimum Copper Supply Wire |
10 AWG |
14 AWG |
| Typical Application |
Residential |
Commercial |
This is a hardwired appliance that runs on a dedicated circuit, not a plug-in unit. Breaker sizing should follow local code and the installation manual rather than the nominal amperage figure alone, since code requirements vary by jurisdiction. Wall mounting also requires the clearances to walls, bench, and ceiling specified in the manual. For safety and code compliance, installation by a licensed electrician is recommended.
Stainless Steel Elements and Direct Rock Contact Heating
Three design choices separate the FIN-45S from a budget heater, and each one has a practical effect on how the unit performs and holds up.
- Stainless steel heating elements come standard on every unit, not as an upgrade. Stainless resists the corrosion cycle that wears down cheaper metal elements in a sauna, where water gets thrown onto hot surfaces again and again. Paired with the fact that the elements are industrial grade and replaceable, the Finlandia FIN-45S electric sauna heater 4.5kw heater is something that gets repaired over the years rather than thrown out.
- Direct rock-to-element contact is the other major factor. Rather than suspending the stones above the elements, the FIN-45S places them in direct contact, which transfers heat into the rock mass more efficiently and improves heat storage. This is the mechanical core of how the heater produces steam quality, and it's worth understanding before comparing models.
- Triple-wall construction rounds it out, keeping exterior surface temperatures lower. While it matters for any wall-mounted installation, it is particularly important in commercial facilities where operators are accountable for maintaining a safe environment.
The unit ships with 45 lbs of igneous sauna stones.
Commercial Features (Controls, 24-Hour Operation, Serviceability)
The FIN-45S was built with commercial duty in mind, and a handful of specific features support that use case.
24-hour operation is the clearest commercial differentiator. The Finlandia FIN-45S electric sauna heater 4.5kW can run continuously when paired with the CX170 control plus a 24H7D time clock, or with the F2 control, its contactor, and a 24H7D time clock. Continuous duty needs that time clock as an added component, not something built into the base unit. The Finlandia 4.5kW sauna heater is well suited for both residential and commercial sauna installations when configured with the appropriate controls and accessories.
The 208V three phase configuration is available for buildings where three-phase power is already standard, with a lower nominal draw of 12.5 amps and a 14 AWG minimum supply wire.
Serviceable elements matter more here than in a residential setting. A commercial heater runs many more hours over its lifetime, so replaceable, industrial grade elements change the total cost of ownership rather than being a minor convenience.
On top of that, the FIN-45S is UL and ETL listed, which commercial specifiers and inspectors will look for.
Stainless Steel Construction and Finish Options
Every FIN-45S ships with stainless steel heating elements and stainless steel construction throughout its internal components. This comes standard on every unit and helps resist the corrosion caused by repeated heat and moisture exposure, contributing to a longer service life.
The exterior finish is a separate matter. The standard exterior color is red, ordered as the FIN-45. A stainless steel exterior is available as an alternative, and anyone who wants it should contact the SaunaHeaters.com team directly.
As a wall-mounted unit, the FIN-45S measures 16 inches wide by 11 inches deep by 24 inches high and weighs 40 lbs before the stones are added. That footprint makes it a practical fit for smaller cabins, provided the mounting clearances listed in the installation manual are followed. The Finlandia wall mounted sauna heater is designed to maximize usable floor space while providing reliable heating performance.
FAQs
What size sauna does the FIN-45S heat?
The FIN-45S is rated for rooms between 100 and 210 cubic feet. Multiply length by width by height to find your volume. Glass doors, uninsulated walls, and tile surfaces increase the requirement, so check the sizing guide if you're near the top of the range.
Does the FIN-45S come with a control, or is it sold separately?
The control is sold separately, and the heater will not operate without one. For 240V single phase, use the CX170 or F1T. For 208V three phase, use the CX170 or the F2T with an FX303 contactor.
What is the difference between the 240V and 208V versions?
The Finlandia FIN-45S 240V sauna heater single phase configuration suits residential wiring and draws 18.8 amps with a 10 AWG minimum supply.
The Finlandia FIN-45S 208V sauna heater three phase configuration suits commercial buildings and draws 12.5 amps with a 14 AWG minimum supply.
Is the FIN-45S made of stainless steel?
The heating elements and internal construction are stainless steel on every unit. The standard exterior finish is red. A stainless steel exterior is available as an alternative build.
Can the FIN-45S be used in a commercial sauna?
It supports commercial installation. It's available in 208V three phase, is UL and ETL listed, has serviceable industrial grade elements, and can run 24 hours a day when paired with the correct control and a 24H7D time clock.
Does the FIN-45S plug in, or does it need to be hardwired?
It's hardwired to a dedicated circuit by a licensed electrician. It does not plug into a wall outlet. Breaker sizing follows local code and the installation manual.
How many pounds of stones does the FIN-45S hold?
The heater ships with 45 lbs of igneous sauna stones, and the rocks sit in direct contact with the heating elements for more efficient heat transfer. Maximum rock capacity will be confirmed and added once available.
Who manufactures Finlandia sauna heaters?
Finlandia sauna heaters are made by Harvia and imported from Finland.
