Finnmark FD-4 Trinity Infrared and Traditional 2-Person Hybrid Sauna
2-Person Home Sauna with Infrared & Traditional Heat – 48"W x 48"D x 78"H
The Trinity Combination Sauna is the only sauna available that combines Finnmark’s UL listed Spectrum Plus infrared heaters with a Harvia Vega 120V traditional heater, plus true medical-grade red light therapy.
Eco-Friendly and Efficient Design
No need to compromise. The Finnmark FD-4 Trinity Combination Sauna is the only system featuring true UL listed infrared heaters together with a traditional sauna heater. Experience the combined benefits of infrared heat and traditional steam sauna rocks.
Contemporary Amenities for an Enhanced Sauna Experience
Get hot fast. The only infrared heaters that have passed rigorous Underwriter Laboratories testing are used alongside a traditional steam sauna stove.
Short-wave far infrared heat penetrates muscles and joints, helping you sweat up to 25x more than carbon panel heaters.
The Harvia Vega 1.9kW traditional heater allows you to pour water over hot stones for an authentic steam sauna experience.
Enjoy both intensity and relaxation only available in a true steam and infrared combination sauna.
Red Light Therapy Benefits
Red light therapy is a form of phototherapy using low-level wavelengths that penetrate the skin and support the production of collagen and other proteins, offering multiple potential wellness benefits.
It is a powerful enhancement to your sauna wellness routine.
Features
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Spectrum Plus™ UL Listed short-wave infrared heaters for deep penetrating heat, up to 25x more than standard carbon panel heaters
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Spectrum Red Light™ Therapy: 192 diode medical-grade LED panel producing 650nm red light therapy combined with chromotherapy
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Antimicrobial Western Canadian cedar interior resistant to mold, bacteria, and fungus
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Thermal Plus™ Aspen exterior that resists rot, warping, decay, and chipping
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3-IN-ONE combination sauna system: infrared + traditional steam heater + medical-grade red light therapy
- Built-in LCD touchscreen controller with Bluetooth audio
- Audio system with 6" HiFi marine-grade speakers
- 8mm tempered glass for optimal thermal retention
- Extra-large two-tier bench system
- Low EMF sauna tested by a NASA award-winning testing facility
- High emissivity infrared heaters
Harvia Vega Compact 1900 Specifications
- Wall-mounted design
- Stainless steel construction
- 1.9kW power
- Suitable for sauna rooms from 70 to 106 cu. ft.
- Requires a minimum of 29 lbs of sauna stones (1 box – AC3000)
- Natural stones vary in shape and size; an additional box is recommended for selection quality
- Built-in controls with ergonomic switches
- Switches can be installed on the right or left side
- Designed, engineered, and made in Finland
- Dimensions: 11"W (279mm) x 11"D (279mm) x 21"H (533mm)
- 2-Year Consumer Warranty
Manufacturer Note: Sauna heater stones are essential for safety. Proper maintenance is required to maintain warranty validity.
Package Contents
- Bottom Panel
- Top Panel
- Back Panel
- Front Panel
- Left Panel
- Right Panel
- Glass Door
- Bench Support
- Bench Top
- Heater Cable
- Floor Cable
- Screws
- Power Supply Unit
- Power Cable
- Interior Heater Connections with Wood Cover
- Door Handle (2 Screws)
- Removable and adjustable sauna feet for uneven surfaces
- Infrared sauna heater panels
- Spectrum LED near infrared ceiling lights with medical-grade Spectrum Red Light therapy
- Controller 2.0 with built-in LCD touchscreen and Bluetooth audio
- Audio upgrade with 6" HiFi speakers
- 8mm tempered glass for superior thermal retention
- ETL Certification
- Limited Warranty
Specifications
| Model |
FD-4 |
| External Materials |
Thermo-Aspen |
| Interior Materials |
Western Red Cedar |
| Volts |
120 |
| IR Watts |
1750 |
| Amperage |
15/20 |
| Plug Type |
NEMA 5-15P |
| Outlet |
Standard 120v 20a |
| Maximum Temperature |
IR 170F - Traditional 190F |
| Interior Dimensions |
44"W x 45'D x 75"H |
| Exterior Dimensions |
48"W x 48"D x 83"H |
| Room Volume |
86 cu. ft. |
| Door Dimensions |
23.625"W x 68.875"H |
| Door Handle Dimensions |
1.5"W x 13.25"H |
| Glass Thickness |
8mm W/Gasket |
| Product Weight |
437 lbs |
| Shipping Dimensions |
36"W x 80"D |
| Shipping Weight |
485 lbs W/48 lb Pallet |
Resources
Features
At Inside Sauna, we aim to offer some of the most competitive sauna prices available online. To maintain fair and consistent pricing, we work closely with our manufacturers and comply with Minimum Advertised Price (MAP) policies. These guidelines help protect our customers and ensure ethical pricing among authorized retailers.
If you find the same product listed at a lower price on another online store, please reach out to us. Our team will review the offer to confirm it meets MAP requirements and dealer authorization standards. Once verified, we will gladly match the price.
Already placed your order? No problem — we can provide a partial refund or apply a custom price adjustment where applicable.
Price Match Eligibility Requirements
To ensure fairness and accuracy, the following conditions apply:
- Promotional offers such as rebates, coupon codes, or “buy one, get one” deals are excluded
- The competing product must be currently in stock
- The competitor must operate as an online-only store (no physical locations)
- Auction platforms, liquidation sites, and discount marketplaces are not eligible
- The competitor must be an authorized dealer of the specific product
If you want to verify whether a product qualifies for price matching before purchasing, we recommend contacting us first. Our support team will review the details and assist you.
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https://insidesauna.com/pages/contact
