Features
Finlandia FLB-45 Series 4.5kW 240V Electric Sauna Heater
- Wall-mounted
- Stainless steel elements
- Built-in controls with silent 60-minute timer, thermostat
- 1-8 hr programmable timer clock allows sauna to be preset up to 8 hrs. in advance of heating
- Controls can also be side-mounted for field adaption when control positioning is a factor
- 240V/1PH operation
- Stainless steel construction
- Optional Stainless Steel exterior
- Industrial grade, serviceable heating elements
- Exceptionally large rock capacity
- Direct rock-to-heating element contact
- 24"H x 16"W x 11"D
- For sauna rooms from 100 to 210 cu. ft.
Specifications
| Finlandia FLB-45 Series 4.5kW 240V Electric Sauna Heater |
| Model |
FLB45 |
| Kilowatt Rating |
4.5 KW |
| Cubic Feet Minimum |
100 CF |
| Cubic Feet Maximum |
210 CF |
| Heater Weight |
40 lbs |
| Shipping Weight with Sauna Stones |
90 lbs |
| Operating Voltage |
240V AC |
| Phase |
Single |
| Nominal Amperage |
18.8 Amps |
| Recommended Minimum Copper Wire Supply |
10 AWG |
| Width |
16" |
| Depth |
11" |
| Height |
24" |
Includes
- Sauna heaters
- 45 lbs of Igneous sauna stones
- Installation and operation manual
- Manufacturer's warranty
Manual
Warranty
Description
Product Highlights
-
Model: FLB-45 (Finlandia FLB-45 electric sauna heater)
-
Output: 4.5 kW electric sauna heater
-
Room capacity: 100 to 210 cubic feet
-
Controls: Built-in, no separate control unit required
-
Timer: Silent 60-minute built-in timer
-
Thermostat: Built-in
-
Pre-set: 1 to 8 hour programmable timer clock
-
Control positioning: Side-mountable for field adaptation
-
Mount: Wall-mounted
-
Voltage: 240V single phase
-
Elements: Industrial-grade stainless steel, serviceable
-
Construction: Stainless steel, triple wall
-
Heating design: Direct rock-to-element contact
-
Stones: 45 lbs of igneous sauna stones included
-
Dimensions: 24 x 16 x 11 inches
-
Heater weight: 40 lbs
-
Shipping weight: 90 lbs (with stones)
-
Finish options: Red (standard) or stainless steel exterior (FLB-45-S)
-
Listings: UL and ETL listed
-
Manufactured by: Harvia, imported from Finland
-
Warranty: Limited lifetime
Why Choose the Finlandia FLB-45 Electric Sauna Heater?
Most 4.5kW sauna heaters ship as a heater and nothing else. The buyer finds out at checkout that a wall control is a separate purchase, a separate wiring run, and often several hundred dollars more. The Finlandia FLB 45 does not work that way. The controls are built into the unit. Timer, thermostat, and programmable pre-set are all included and ready to wire when the heater goes on the wall.
Beyond the controls, the FLB 45 sauna heater is built for a long service life rather than a replacement cycle. The heating elements are industrial-grade stainless steel and fully serviceable, so a failed element gets replaced rather than the whole unit. Stainless steel construction handles the humid, repeatedly doused environment a sauna heater actually lives in. And the heater ships with 45 pounds of igneous stones included, which several competing models at this output do not.
The manufacturing relationship is a genuine credibility point. Manufactured by Harvia in Finland, the FLB-45 is imported for the U.S. market under the Finlandia brand. It is UL and ETL listed and includes a limited lifetime warranty.
Sized for Sauna Rooms from 100 to 210 Cubic Feet
The 4.5 kW Finlandia sauna heater is rated for sauna rooms from 100 to 210 cubic feet. To find your room's volume, multiply the interior length by the width by the ceiling height.
Three worked examples make the math concrete. A 5 by 6 foot room at 7 feet high is 210 cubic feet and sits right at the top of this heater's rated range. A 4 by 6 at 7 feet is 168 cubic feet, comfortably mid-range. A 4 by 4 at 7 feet is 112 cubic feet, just above the minimum for this Finlandia FLB 45 electric sauna heater for home sauna use.
The lower limit matters as much as the upper. A 4.5 kW electric sauna heater in a room below 100 cubic feet will reach temperature quickly and cycle off repeatedly, producing uneven heat and running the elements harder than the design intends. Oversizing is not a safe default.
Two adjustments the manufacturer's sizing guide accounts for: uninsulated exterior walls and glass surfaces. A glass door, glass wall panel, or exposed masonry or tile all increase the effective volume the heater must serve beyond the raw cubic footage. If your room has any of those and sits near the top of the 100 to 210 range, review the sizing guide before settling on the FLB-45.
Use the sauna heater size calculator to confirm the fit. If the room falls below 100 cubic feet, consider the FLB-30. If it exceeds 210, the FLB-60 or FLB-80 is the appropriate step up.
240V Hardwired Wall-Mounted Installation
The 4.5 kW wall-mounted Finlandia FLB-45 electric sauna heater is a hardwired appliance. There is no plug-in configuration available; the heater requires a hardwired electrical connection. It draws 240V AC single-phase at a nominal 18.8 amps, with a recommended minimum supply of 10 AWG copper.
Installation requires a licensed electrician on a dedicated circuit. Local electrical code governs the installation, and SaunaHeaters.com cannot advise on code requirements for a specific location. Breaker sizing is determined by the electrician under local code using the installation manual, not from the nominal amperage figure alone.
The Finlandia wall-mounted sauna heater is 24 inches high, 16 inches wide, and 11 inches deep. It weighs 40 pounds before stones, and considerably more once the rock load is in place, so the mounting wall and fixings need to be adequate for the loaded weight. Required clearances from the bench, adjacent walls, and ceiling are specified in the Finlandia installation and operation manual. Follow those figures rather than estimating them.
One control positioning detail that belongs with the installation decision: the built-in controls can be side-mounted for field adaptation where the standard front-facing position does not suit the room layout. The electrician needs to know this before the Finlandia wall-mounted sauna heater goes on the wall, not after.
Stainless Steel Heating Element Technology
The case for the FLB 45 series sauna heater starts with the elements, because that is where the material claim does real work. The elements in the Finlandia FLB-45 sauna heater are industrial-grade stainless steel and fully serviceable. In practice that means a failed element can be replaced rather than the entire heater, which over a long service life changes the real cost of ownership.
The rock contact design reinforces that thermal performance. Stones sit in direct contact with the heating elements rather than suspended above them, which the manufacturer states produces greater efficiency and a more even, consistent heat. A large stone load, held at temperature and in direct contact with the heating surface, responds consistently when water is added and holds that heat between ladles rather than dropping away.
Corrosion resistance is the third piece. A sauna heater operates in a hot, humid environment where water is thrown onto hot metal repeatedly across hundreds of sessions. Stainless steel components handle that cycle better than lower-grade materials. The heater's stainless construction and stainless elements make that resistance structural rather than a surface treatment.
Premium Features: Built-In Controls, Timer, and Thermostat
What built-in controls mean in practice on the Finlandia FLB45 sauna heater: no separate wall control to specify, no second wiring run to plan, no additional purchase, and one fewer compatibility decision to get wrong. Buyers comparing 4.5kW heaters across brands are often comparing a heater price against a heater-plus-control price without realizing it. This section is where that becomes clear.
The control panel focuses on the features that matter. A 60-minute timer and adjustable thermostat handle everyday use, while the 1 to 8-hour programmable timer makes it possible to have the sauna warmed up and ready before you arrive.
The controls can also be side-mounted for field adaptation where the standard position does not suit the room layout. That decision is made at installation.
The FLB-45 sauna heater comes complete with the heater unit, 45 pounds of igneous sauna stones, the installation and operation manual, and the manufacturer's warranty. Stones included is worth noting plainly since competing heaters at this price often require a separate stone purchase. A safety rail and heater guard are available as accessories and recommended where bench or floor clearance is tight.
Red or Stainless Steel Finish Options
The Finlandia FLB 45 series is available in two exterior finishes. The standard red finish is the traditional Finlandia look and the lower-cost option. The stainless steel exterior, model FLB-45-S, suits modern cabin interiors and is easier to keep looking clean under regular use.
What does not change between them: both finishes share the same stainless steel heating elements, the same stainless internal construction, the same 4.5kW output, the same dimensions, and the same electrical requirement.
The choice between the Finlandia FLB 45 electric sauna heater in red and the FLB-45-S is appearance and price, not performance. A buyer who assumes the stainless exterior version heats differently will be disappointed. One who assumes the standard red is a lesser heater will overspend without reason.
FAQs
Does the Finlandia FLB-45 need a separate control unit?
The FLB-45 features built-in controls with a 60-minute timer, an adjustable thermostat, and a 1 to 8-hour programmable preset timer. The integrated controls eliminate the need for a separate control unit, helping simplify installation and lower overall installation costs.
What size sauna room does the FLB-45 heat?
The FLB-45 is designed for sauna rooms between 100 and 210 cubic feet. To calculate your sauna's volume, multiply the interior length by the width and the height.
If the room includes uninsulated walls, glass doors, or exposed masonry, the effective heating volume will be higher, so consult the manufacturer's sizing guide before selecting a heater.
What electrical supply does the FLB-45 need?
240V single-phase at a nominal 18.8 amps, with a recommended minimum 10 AWG copper supply. The Finlandia FLB-45 electric sauna heater must be hardwired to a dedicated circuit by a licensed electrician in accordance with local electrical codes. It cannot be installed using a plug-in connection.
Can the FLB-45 be set to heat before arriving home?
The built-in programmable timer clock allows the sauna to be preset to begin heating up to eight hours in advance. The room is already at the desired temperature when you arrive, rather than heating up while you wait.
What is the difference between the red and stainless steel versions?
Appearance and price are the only distinctions between the two models. The FLB-45 and FLB-45-S have the same heating elements, output, dimensions, and electrical specifications, so neither offers better heating performance than the other.
Are sauna stones included with the FLB-45?
The heater includes 45 pounds of igneous sauna stones, the installation and operation manual, and the manufacturer's warranty. The total shipping weight, including the stones, is 90 pounds.
Can the controls be repositioned if the standard position does not suit the room?
The controls can be side-mounted to better suit the sauna layout when the standard front-facing position is not practical. This configuration should be chosen before installation, as access is limited once the heater is mounted to the wall.
