Features
Finlandia FIN-45 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-45 Series 4.5kW 240V/208V Electric Sauna Heater |
| Model |
FIN-45 |
| 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
-
Output: 4.5 kW
-
Room capacity: 100 to 210 cubic feet
-
Mount: Wall-mounted
-
Voltage: 240V single phase or 208V three phase (Chosen at order time)
-
Control unit: Required and sold separately (Heater will not operate without one)
-
Rocks: Included
-
Construction: Triple wall
-
Heating design: Direct rock-to-element contact
-
Elements: Industrial-grade stainless steel
-
Manufactured by: Harvia, Finland
-
Listings: UL and ETL listed
-
Warranty: Limited lifetime (confirm full terms on product page)
Why Choose the Finlandia FIN-45 Sauna Heater?
A sauna heater gets used hard. High temperatures, repeated cycles, and water thrown directly onto hot metal for years. When a heater is subjected to that kind of use, build quality becomes the defining factor.
Finlandia sauna heaters are manufactured by Harvia in Finland. Harvia isn't just a brand name on an imported product. It is the manufacturer that established the engineering benchmark for traditional electric sauna heaters across Europe and North America. Choosing a Finlandia FIN-45 means choosing a unit built to that standard, not a lower-cost alternative that approximates it.
The Finlandia electric sauna heater FIN-45 runs at 4.5kW and is rated for rooms between 100 and 210 cubic feet. Triple-wall construction helps keep the outer surface cooler than comparable single-wall designs, an important advantage in compact sauna spaces. The direct rock-to-element contact design is a true engineering feature that contributes to more consistent heat and steam production. Both are reasons the Finlandia heater competes on build rather than price.
Sizing the FIN-45 to Your Sauna Room
The Finlandia 4.5 kW sauna heater is rated for sauna rooms between 100 and 210 cubic feet. The most important buying decision is choosing the correct heater size, but it's frequently overlooked.
To find your room's cubic footage, multiply the interior length by the width by the ceiling height. Two examples make the arithmetic concrete. A room measuring 6 feet by 5 feet with a 7-foot ceiling has a volume of 210 cubic feet, placing it at the upper limit of the FIN-45's recommended range. A 5 ft × 4 ft × 7 ft room equals 140 cubic feet, well within the middle of the heater's recommended capacity range.
The calculation is important, but selecting the correct heater based on that result matters just as much. An undersized heater in a room too large for it either never reaches the target temperature or takes so long to get there that the session is compromised. An oversized heater in a room too small short-cycles, produces harsh and uneven heat, and wears faster than it should. In both cases, the root cause is incorrect sizing, not calibration, and a control unit cannot compensate for it.
Several factors increase the effective thermal load beyond raw cubic footage. An uninsulated exterior wall, a glass door, a glass wall panel, or bench and floor surfaces in stone or tile all absorb and lose heat faster than wood does. If any of those apply to your room and your cubic footage is near the top of the 100 to 210 range, size up to the FIN-60 rather than try to make the FIN-45 cover it.
If Finlandia publishes specific derating guidance for glass or masonry in the installation documentation for this Finlandia FIN-45 series unit, use those figures. If not, treat the presence of glass or masonry as a signal to move up rather than an invitation to apply a multiplier.
Rooms below 100 cubic feet call for the FIN-30. Rooms above 210 cubic feet call for the FIN-60 or FIN-80. The Finlandia sauna heater line covers the full range; use the right model for the room.
240V and 208V Hardwired Installation Requirements
The FIN-45 is hardwired. It does not have a plug. It does not connect to a standard household outlet. This is a Finland electric sauna heater that ships in 240V single phase or 208V three phase configuration, and installation requires a licensed electrician and a dedicated circuit sized to the heater's load. Local electrical code governs the installation, and SaunaHeaters.com cannot advise on code requirements for a specific location.
The voltage configuration is selected at the time of purchase, with options for either 240V or 208V. These are not interchangeable after purchase. Choosing the wrong configuration can result in an unnecessary exchange of a heavy item. Confirm the voltage supply available at your electrical panel before placing the order. An electrician can confirm this in a few minutes.
Before the electrician begins work, review the Finlandia installation manual for the Finlandia Fin 45 electric sauna heater to confirm the required breaker size and wire gauge for the chosen voltage configuration. Do not rely on a general reference for these figures. Use the manual for this heater.
The steps worth confirming before ordering:
- Confirm 240V single phase or 208V three phase supply at the panel
- Engage a licensed electrician before the order arrives
- Review required clearances between the heater, bench, walls, and ceiling in the installation manual before framing
-
Confirm the mounting wall is structurally adequate to carry the heater plus its loaded rock weight
This is not a DIY installation. Every step above applies regardless of general electrical experience.
Stainless Steel Elements and Direct Rock Contact Heating
The defining feature of this Finlandia Fin 4.5 kW heater is the rock-to-element contact design. In this configuration, the rocks do not sit in a tray suspended above the elements. They sit in direct contact with the elements. Heat transfers into the rock mass through direct conduction rather than radiation across an air gap, which charges the stones more efficiently and produces more even, sustained heat once the mass reaches temperature.
A properly heated rock mass is what creates authentic löyly. When water is thrown onto properly heated stones, the mass absorbs it, flashes it to steam, and releases that steam steadily into the room. A well-designed rock bed with adequate mass responds consistently; an underpowered or poorly loaded one does not. The FIN-45 holds a substantial rock load relative to its output class, and the direct contact design ensures those rocks are fully heated before the first ladle of water goes on.
The elements themselves are industrial-grade stainless steel. In a sauna environment where hot metal is regularly exposed to water, element material is a long-term performance question, not just a spec line. Stainless steel handles thermal cycling and corrosive exposure better than lower-grade alternatives. Elements are also a serviceable replacement part on this sauna heater Finlandia unit, which is worth noting given the limited lifetime warranty. The FIN-45 is designed to be serviced over a long working life, not replaced when an element eventually fails.
This heater produces high air temperature and traditional steam through rock contact. That is a different experience from infrared heating. Neither is superior; they are different technologies that produce different environments.
Control Unit Options, Sold Separately
The FIN-45 will not operate without a separately purchased control unit. There are no built-in controls on the heater body. A Finlandia sauna heater control unit is required before the heater can be used, and it needs to be matched to the voltage configuration ordered.
For the 240V single-phase configuration, compatible controls are the Harvia Xenio CX170 digital control or the Finlandia F1T mechanical timer. For the 208V three-phase configuration, compatible options are the Harvia Xenio CX170 or the Finlandia F2T used alongside an FX303 contactor. Confirm compatibility against current Finlandia documentation before purchasing, since control compatibility can change across product generations.
The digital control units handle temperature setting, session timing, and delayed start. The F1T is a mechanical timer for buyers who prefer an analog interface without digital programming.
If ordering a heater plus control together, a bundle is available that removes the need to source and match them separately. This is the most common source of incomplete orders on heater pages, and ordering the control at the same time as the FIN-45 prevents the delay of discovering the heater can't run after it arrives.
Do not order the FIN-45 without also ordering a compatible control from the Finlandia FIN-45 series accessory lineup. The heater does not include one and cannot be used without one.
Triple Wall Construction and Finish Options
Triple wall construction on this Finlandia wall-mounted sauna heater means the outer body is separated from the heating components by multiple wall layers rather than a single sheet of metal. That layered structure reduces the outer surface temperature of the unit. In a sauna room where a bather may move past the heater or sit near it, a lower outer surface temperature is a safety consideration first and a design detail second.
The outer body of the standard FIN-45 is finished in red baked enamel. The stainless steel exterior finish is a separate SKU.
The interior construction, heating elements, rock basket, and output rating are consistent between the two finish options. Both are engineered to the same standards.
FAQs
What size sauna room does the FIN-45 heat?
The Finlandia 4.5 kW sauna heater is rated for 100 to 210 cubic feet. Multiply your room's interior length by width by ceiling height to confirm the FIN-45 fits before ordering.
Does the FIN-45 come with a control unit?
The FIN-45 requires a separately purchased control unit to operate. Compatible Finlandia sauna heater controls for the 240V version include the Harvia Xenio CX170 or the Finlandia F1T. For the 208V version, the CX170 or F2T with FX303 contactor. Order the control at the same time as the heater.
Can the FIN-45 be plugged into a standard outlet?
The Finlandia FIN-45 electric sauna heater is hardwired at 240V single phase or 208V three phase. There is no plug. Installation requires a licensed electrician and a dedicated circuit. It cannot connect to a standard residential outlet.
What is the difference between the 240V and 208V versions?
The two configurations match different electrical supply types found in residential and commercial buildings. They use different compatible controls and are not interchangeable after purchase. Confirm the supply at your panel before ordering.
The Finlandia Fin 45 240V sauna heater and the Finlandia Fin 45 208V sauna heater are separate products in the Finlandia Fin 45 series chosen at checkout.
Are sauna rocks included with the FIN-45?
Yes, rocks are included with this Finlandia sauna stove. Rock weight is confirmed on the product page. Sauna rocks degrade with use. They should be rearranged periodically and replaced when they begin to crack or crumble, as degraded stones affect heat quality and steam output.
Who manufactures Finlandia sauna heaters?
Finlandia sauna heaters are manufactured by Harvia in Finland. The Harvia Finlandia sauna line is sold under the Finlandia brand name in North America. The FIN-45 is UL and ETL listed for the US market and carries a limited lifetime warranty.
