Finnmark FD-3 3-4 Person Full Spectrum Infrared Sauna
The Finnmark FD-3 is a 3-4 person indoor infrared sauna that pairs UL-listed Spectrum Plus™ infrared heaters with Spectrum Carbon far infrared panels and near-infrared LED ceiling lights. It runs on a dedicated 240V / 15A circuit, heats up to 170°F in under an hour, and is built with a Thermal Plus™ Aspen exterior around an A-grade Western Canadian Cedar interior.
Full spectrum heat for 3 to 4 people
Seven Spectrum Plus™ heaters surround the bench: four on the back wall, one under the bench, and two on the front wall. These dual-wave Incoloy heaters produce mid and far infrared and are rated for about 40,000 hours. Spectrum Carbon panels on both side walls add long-wave far infrared with low EMF/ELF technology, 0.99 emissivity, and a rated life of about 30,000 hours. Near infrared comes from the Spectrum LED ceiling lights, so all three ranges work together in one session.
Thermal Aspen outside, cedar inside
The exterior is Thermal Plus™ Aspen, a wood that is heat and steam treated with no chemicals and is made to resist rot, warping, decay, and chipping. The walls, bench, and backrest inside are A-grade Western Canadian Cedar, which is naturally antimicrobial. Double-walled construction with non-toxic wool insulation and an 8mm tempered glass door help keep the heat inside the cabin, and ergonomic backrests make longer sessions more comfortable.
Smart, simple, certified
Controller 2.0 puts an LCD touchscreen inside the cabin for temperature, lighting, and music, and the Wi-Fi app lets you turn the sauna on or off from your phone. Bluetooth audio plays through 6" HiFi speakers, and the LED ceiling lights add color therapy. The FD-3 plugs into a 240V / 15A outlet (NEMA 6-15P) on a dedicated circuit with no hardwiring at the cabin; if the room has no 240V outlet, a licensed electrician should install one. The cabin is ETL certified, the Spectrum Plus™ heaters are UL listed, and EMF levels are third-party tested. You can review the test log and certificates in the documents below.
Specifications
Dimensions & capacity
| External dimensions |
72" W × 46" D × 78" H |
| Internal dimensions |
67" W × 41" D × 70" H |
| Interior volume |
111.3 cu. ft. |
| Door opening |
23.625" W × 67.875" H |
| Door handle |
1.875" W × 11.625" H |
| Capacity |
3-4 people |
| Product weight |
488 lbs |
| Shipping weight |
536 lbs (incl. 48 lb pallet) |
| Clearance |
3" above the roof and around all walls |
Construction & materials
| Exterior wood |
Thermal Plus™ Aspen (heat and steam treated) |
| Interior wood |
A-grade Western Canadian Cedar |
| Walls |
Double-walled
Non-toxic wool insulation |
| Glass |
8mm tempered glass door |
| Seating |
Cedar bench with ergonomic backrests |
| Feet |
Removable, adjustable |
| Placement |
Indoor, any flat surface (including carpet)
Outdoor only with an outdoor cover
On a level, dry, hard surface under an overhang |
Heaters & performance
| Infrared type |
Full spectrum (near, mid, far) |
| Spectrum Plus™ heaters |
7 total: 4 back wall, 1 under bench, 2 front wall
(mid and far infrared, UL listed) |
| Spectrum Carbon panels |
Both side walls (far infrared) |
| Near infrared |
Spectrum LED ceiling lights |
| Heater lifespan |
Spectrum Plus™ approx. 40,000 hrs
Spectrum Carbon approx. 30,000 hrs |
| Emissivity |
0.99 |
| Max temperature |
170°F (77°C) |
| Heat-up time |
Under 1 hour to 170°F |
| EMF rating |
Low EMF/ELF (third-party tested) |
Electrical & controls
| Power |
240V / 15A / 3,150W, single phase |
| Plug |
NEMA 6-15P |
| Circuit |
Dedicated 240V / 15A circuit
No hardwiring needed at the cabin |
| Power cord |
Approx. 9 ft, from top front |
| Controller |
Controller 2.0, LCD touchscreen |
| App control |
Yes, Wi-Fi (on/off from your phone) |
| Audio |
Bluetooth with 6" HiFi speakers |
| Lighting |
Spectrum LED near-infrared ceiling lights with color therapy |
Certifications
| UL Listing |
Yes, Spectrum Plus™ heaters (UBJY2.E65554) |
| ETL Certification |
Yes, cabin (Intertek infrared sauna safety) |
| EMF Test Log |
Available (PR108242) |
| Finnmark Certification |
Available |
What's included
Bottom, top, back, front, left and right panels
8mm tempered glass door
Bench support and bench top
Infrared heater panels
Interior heater connections with wood cover
Heater cable and floor cable
Power supply unit and power cable (9 ft)
Controller 2.0 LCD touchscreen with Bluetooth audio
Spectrum LED near-infrared ceiling lights
6" HiFi speakers
Door handle (with 2 screws)
Removable, adjustable feet
Assembly screws
ETL certification and limited warranty
Why the Finnmark FD-3 stands out
Full spectrum infrared
Seven Spectrum Plus™ dual-wave heaters (mid and far), Spectrum Carbon side panels (far), and LED ceiling lights (near) work together in one cabin.
Low EMF/ELF
Spectrum Carbon panels use low EMF/ELF technology, and EMF levels are tested by a third-party lab. The test log is available below.
Room for 3 to 4
A 67" wide interior with one long cedar bench and ergonomic backrests seats 3 to 4 people in a 72" × 46" footprint.
Thermal Aspen and cedar
Chemical-free Thermal Plus™ Aspen exterior with an antimicrobial Western Canadian Cedar interior.
Touchscreen and Wi-Fi
Set temperature, lighting, and music on the Controller 2.0 touchscreen, and start the sauna from your phone over Wi-Fi.
UL listed & ETL certified
Spectrum Plus™ heaters are UL listed and the cabin is ETL certified. Documentation is available below.
About Finnmark Designs
Full spectrum home sauna
Full spectrum infrared for 3 to 4 people
Finnmark Designs builds infrared saunas around its Spectrum Plus™ and Spectrum Carbon heater systems, low EMF/ELF performance, and natural woods. The FD-3 brings that full spectrum setup into a 3-4 person cabin with seven Spectrum Plus™ heaters.
-
Full spectrum infrared, near, mid and far in one cabin
-
Low EMF/ELF, third-party tested with a published test log
-
Thermal Aspen and cedar, chemical-free exterior, antimicrobial interior
-
UL listed & ETL certified, UL heaters and ETL cabin
-
Controller 2.0 with Wi-Fi, LCD touchscreen and app on/off
About Finnmark Designs
Built for the home, backed by documentation
The FD-3 gives 3 to 4 people full spectrum heat in a freestanding cabin that fits a basement, garage, or spare room. It ships as a DIY kit that two people can assemble with a screwdriver and a level.
From the third-party EMF test log to the UL listing and the ETL certificate, Finnmark publishes the documents behind its claims so you can review them before you buy.
Manuals & Documents
Everything you need before and after installation
Download the official Finnmark Designs documentation below: the installation manual, the V2 Wi-Fi controller guide, the EMF test log, the UL listing, the ETL certificate, the Finnmark certification, and the warranty document. Reviewing the IOM (Installation & Operation Manual) before delivery is recommended so you know what to expect on installation day.
Installation & Operation Manuals
Test Logs & Certifications
Warranty
Warranty
Lifetime
Spectrum Plus™ Heaters
Warranty basics
The Finnmark FD-3 comes with a 10-year Finnmark Designs sauna warranty, plus an unconditional lifetime warranty on the Spectrum Plus™ heaters. For infrared saunas in the USA, "lifetime" is considered 7 years.
Coverage conditions
The sauna must be installed and maintained as instructed. The FD-3 is designed for indoor use; using it outdoors without an outdoor cover voids the warranty.
Full terms
We are an authorized Finnmark Designs dealer. See the official warranty document above for full terms, exclusions, and claim procedures.
