Finnmark Designs FD-4 Hybrid Infrared and Steam Sauna
Finnmark FD-4 Trinity Infrared & Steam Sauna Combo – 2-Person Home Sauna
The Ultimate Infrared & Steam Sauna Experience—No Compromises
Why choose between an infrared sauna and a traditional steam sauna when you can have both? The Finnmark FD-4 Trinity Infrared & Steam Sauna Combo is the only sauna on the market that seamlessly combines UL-listed infrared heaters, a traditional 120V sauna heater, and medical-grade Spectrum Red Light™ Therapy—all in one luxurious and compact 2-person unit.
Experience the deep, detoxifying heat of infrared therapy, the intense sweat of a Finnish steam sauna, and the rejuvenating effects of red light therapy, all while using standard 120V power—no electrician required.
Whether you’re looking for muscle recovery, detoxification, or pure relaxation, this sauna delivers every wellness benefit possible in one powerful system.

FD-4 Trinity Infrared & Steam Sauna Combo Features
- 3-in-1 Infrared, Steam & Red Light Therapy: The only sauna that combines UL-listed Spectrum Plus™ infrared heaters, a Harvia Vega traditional heater, and medical-grade red light therapy for a complete wellness experience.
- Harvia Vega Compact 1900 Traditional Sauna Heater: Enjoy the full steam sauna experience by splashing water on 29 lbs of heated sauna stones—authentic Finnish sauna heat at its finest.
- Spectrum Plus™ UL-Listed Infrared Heaters: Emits short-wave infrared heat that penetrates 25x deeper than standard carbon panels, detoxifying at the cellular level.
- Medical-Grade Spectrum Red Light™ Therapy: A 192-diode LED panel delivers 650nm red light therapy, which stimulates collagen production, promotes faster muscle recovery, and enhances circulation.
- Western Canadian Cedar Interior: Naturally antimicrobial, resisting mold, bacteria, and fungus to keep your sauna fresh.
- Thermal Plus™ Aspen Exterior: Warp-resistant and built to last, ensuring long-term durability without rot, warping, or decay.
- 8mm Tempered Glass & Two-Tier Bench System: Designed for optimal heat retention, with an extra-large, ergonomic seating area for maximum comfort.
- Low EMF, NASA-Tested Heaters: Ensures safe and effective infrared therapy with minimal electromagnetic field exposure.
- V2 LCD Touchscreen & Bluetooth Audio: Easily adjust temperature, lighting, and music via a 5” touchscreen controller with marine-grade HiFi speakers.
Finnmark Designs FD-4 2 Person Trinity Hybrid Sauna Specifications
- Exterior Material: Thermo-Aspen
- Interior Material: Western Canadian Cedar
- Electrical Requirements: 120V / 1750W (Infrared) + 1.9kW (Traditional) / 15-20A / NEMA 5-15P plug
- Maximum Temperature: Infrared: 170°F / Traditional: 190°F
- Interior Dimensions: 44.25” W x 45.5” D x 75.5” H
- Exterior Dimensions: 48” W x 48” D x 83” H
- Room Volume: 86 cu. ft.
- Glass Thickness: 8mm with Gasket
- Product Weight: 437 lbs
- Shipping Weight: 485 lbs (including pallet)
- Warranty: Covered by the manufacturer’s limited warranty
Harvia Vega Compact 1900 Sauna Heater Specifications
- Material: Stainless Steel
- Power: 1.9kW
- Voltage: 120V / 15.9 Amps
- Room Capacity: 70-106 cu. ft.
- Dimensions: 11” W x 11” D x 21” H
- Weight: 15.4 lbs (with stones: 59.4 lbs)
- Controls: Built-in, ergonomic operating switches

Downloads:
- Installation and Operation Manual
- FinnMark FD-4 Diagram
- EMF Test Log
- UL Listing
- Warranty
- Finnmark Certification
- ETL Certification
- Harvia Vega Heater Installation and Operation Manual
- Harvia Suitable Sauna Stones Update
Experience the most complete sauna session possible with FD-4 Hybrid Full Spectrum Infrared Sauna, all from the comfort of your home.
Order Processing: Once your order is placed, you’ll receive a confirmation email. Please allow 1–3 business days for order review and processing. If we need to confirm delivery details or there are any delays, we’ll reach out right away.
How Saunas Ship:
- Freight Delivery (Most Saunas): Sauna kits and larger models ship on a pallet via freight carrier and are delivered curbside.
- Parcel Shipping (Smaller Items): Accessories or small components may ship via UPS, FedEx, or USPS.
Estimated Delivery Timeline:
- Processing: 1–3 business days.
- Estimated Ship-Out: Typically ships in 1–2 weeks.
- Transit Time: Freight shipments typically take 3–10 business days once shipped.
- Delivery Appointment: The carrier will usually contact you to schedule delivery. An adult must be present to receive and inspect the shipment.
Important Delivery Notes:
- Curbside Delivery: Freight is delivered to the end of your driveway or loading area. Inside delivery or white-glove service is not included unless arranged in advance.
- Measure First: Confirm doorway widths, staircases, and access paths. Sauna kits ship in multiple boxes and/or pallets.
- Inspect on Arrival: Before signing, check for visible damage to packaging or pallet.
If There’s Damage: Note it on the delivery receipt (ex: “Damaged – subject to inspection”), take photos, and contact us within 48 hours so we can assist with next steps.
Warranty Coverage:
We are an authorized dealer, and all saunas include the full manufacturer’s warranty. Coverage terms vary by brand and model and are listed on the product page.
What’s Typically Covered:
- Manufacturer defects in sauna materials and components
- Heaters, controls, and electrical components per manufacturer policy
- Replacement parts shipped to you (labor not typically included)
What’s Typically Not Covered:
- Shipping damage not noted at delivery
- Natural wood variation, knots, or movement over time
- Improper installation, misuse, or operation outside manufacturer guidelines
- Electrical issues due to incorrect wiring or inadequate power supply
Need Help? If you have questions or need to start a warranty claim, contact us and we’ll help coordinate with the manufacturer to get things resolved as quickly as possible.
Sauna FAQs
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