Finnmark FD-3 Full-Spectrum Infrared Sauna

The FD-3 is where Finnmark's full-spectrum infrared technology gets the room it deserves. As the only infrared sauna manufacturer to combine UL-listed Spectrum Plus™ short-wave heaters with Spectrum Carbon 360° long-wave panels, Finnmark delivers a qualitatively different sauna experience: short-wave heat penetrates up to 25 times deeper than standard carbon panels, while the 360° long-wave panels wrap the entire interior in even, radiant warmth. Every heater is strategically placed for maximum therapeutic coverage, and the result is a cabin that reaches 170°F in under an hour — hotter, faster, and more effective than anything in its class. The naturally antimicrobial Western Canadian Cedar interior resists mold, bacteria, and fungus, while the Thermal Plus™ Aspen exterior won't rot, warp, decay, or chip over years of daily use. Double-walled non-toxic wool insulation keeps every degree where it belongs, and removable adjustable feet handle uneven floors. Inside, an 8mm tempered glass door, LCD Wi-Fi touchscreen with Bluetooth audio, and 6" Hi-Fi speakers make every session as enjoyable as it is effective.

Benefits of infrared

• Spectrum Plus™ heaters warm core body temperature for a deeper, cleaner sweat while supporting lower blood pressure and heart health
• Short-wave infrared penetrates beyond muscle and fat for superior toxin removal, up to 17% more than conventional saunas including heavy metals, cholesterol, and uric acid
• Faster muscle recovery through increased blood flow and oxygen delivery
• Natural pain relief with every session
• Full-spectrum combination of long-wave and short-wave infrared delivers higher temperatures, full-body coverage, and deeper penetration than any single-technology sauna

Key features

• 3 to 4-person full-spectrum infrared sauna
• UL-listed Spectrum Plus™ short-wave and Spectrum Carbon 360° long-wave infrared heaters
• Western Canadian Cedar interior, naturally antimicrobial, mold and odor resistant
• Thermal Plus™ Aspen exterior, rot, warp, and decay resistant
• Reaches 170°F in under 1 hour on a dedicated 240V outlet
• LCD Wi-Fi touchscreen control panel with Bluetooth audio
• 6" Hi-Fi speakers and Spectrum LED near-infrared ceiling lighting
• 8mm tempered glass door
• Low EMF, tested by a NASA award-winning facility
• Double-walled insulated construction with non-toxic wool
• Removable, adjustable feet for uneven floors
• ETL listed

Brand: Finnmark Designs
Model: FD-3
SKU: FD-KN003
Origin: Europe
Capacity: 3 to 4 persons
Exterior Dimensions: 72"W x 46"D x 78"H
Interior Dimensions: 67"W x 41"D x 70"H
Room Volume: 111.3 cu. ft.
Door Dimensions: 23.625"W x 67.875"H
Door Handle Dimensions: 1.875"W x 11.625"H
Glass Thickness: 8mm tempered
Interior Material: Western Canadian Cedar
Exterior Material: Thermal Plus™ Aspen
Insulation: Double-walled non-toxic wool
Heaters: Spectrum Plus™ short-wave and Spectrum Carbon 360° long-wave
Max Temperature: 170°F (77°C)
Power: 3,150W
Voltage: 240V / 15A / Single Phase
Plug: NEMA 6-15P (dedicated 240V outlet required)
Control: LCD Wi-Fi touchscreen
Audio: Bluetooth and 6" Hi-Fi speakers
Product Weight: 488 lbs
Shipping Weight: 605 lbs
Shipping Dimensions: 80"W x 40"D x 79"H
Certifications: ETL listed, low EMF tested
Warranty: Limited manufacturer warranty

• Bottom, top, back, front, left, and right panels
• Glass door, bench support, bench top, floor grid
• Spectrum Plus™ and Spectrum Carbon 360° infrared heater panels
• Spectrum LED near-infrared ceiling lights
• Controller 2.0, LCD Wi-Fi touchscreen with Bluetooth audio
• 6" Hi-Fi speakers
• Heater cable, floor cable, power supply unit, power cable
• Interior heater connections with wood cover
• Door handle
• Removable and adjustable sauna feet
• ETL Certification
• Limited manufacturer warranty

The FD-3 arrives as a modular kit and assembles with the included hardware and installation manual. Requires a dedicated 240V / 15A NEMA 6-15P outlet — this is not a standard household outlet; installation by a licensed electrician is recommended. Adjustable feet accommodate uneven floors. Connect via Wi-Fi and pair Bluetooth audio through the LCD touchscreen controller. Refer to the included installation and operation manual and operator manual for full setup and operating guidance.

For general wellness purposes only. No medical claims are made or implied. Results are not guaranteed and may vary. Always consult a qualified healthcare professional before use, especially if you have a medical condition, are pregnant, nursing, taking medication, or use an implanted electronic device.

• Installation Manual
• EMF Test Log
• Controller Manual

10-year limited manufacturer warranty. Covers manufacturing defects in materials and workmanship under normal residential use. Does not cover damage from improper installation, misuse, neglect, or unauthorized modifications. Contact support@marterraelements.com with your order number, photos, and a description of the issue. We aim to respond within 2 to 3 business days. Warranty is non-transferable and requires original proof of purchase.

Finnmark Warranty

Free shipping to the contiguous United States. Ships on a wooden pallet by appointment with curbside delivery; customers will be contacted prior to shipment to coordinate delivery and discuss any site-specific requirements. Remote delivery areas may be subject to additional charges.

Returns are accepted within 30 days of delivery and require prior approval before anything is sent back. Please reach out to support@marterraelements.com to get the process started. Items must be unused, undamaged, and in their original condition with original packaging intact. Change of mind returns are subject to a restocking fee of up to 20%, and return shipping costs are the responsibility of the customer. Proof of purchase required.