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Finnmark FD-4 2-Person Indoor Hybrid Sauna – Infrared & Steam Combo
by Finnmark
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2-person indoor hybrid sauna: infrared plus traditional heater
The Finnmark FD-4 (Trinity) is an indoor hybrid for two that pairs six Spectrum Plus infrared heaters with a Harvia Vega Compact traditional heater. It also has a Spectrum Red Light panel (650nm) and color lighting. The interior is clear A-grade Canadian Western red cedar with a Thermal Plus aspen exterior and fully insulated walls.
Best for: Two people who want infrared and traditional heat in one indoor cabin.
Specifications at a glance
- Capacity: 2 persons
- Exterior: 48.8 in W x 48.8 in D x 83.1 in H
- Interior: 44.5 in W x 45.1 in D x 75.2 in H
- Infrared heaters: 6 Spectrum Plus (3 back wall dual-wave, 1 under bench, 2 side walls)
- Traditional heater: Harvia Vega Compact, 1.9 kW
- Infrared power: 1,750W, 120V, 15 amp
- Plug: NEMA 5-15P
- Infrared mode temperature: 170°F
- Red light panel: Spectrum Red Light, 650nm
- Manufacturer warranty: 10-year sauna, 2-year Harvia heater (see the warranty guide)
Space, power and setup
Measure the room, doorways and any stairs before delivery, and allow for the 83.1 in height. The infrared heaters are listed at 120V and 15 amp, and the Harvia Vega Compact 1900 is listed at 120V and 15.9 amp. Ask our team and a licensed electrician to confirm the circuit setup for running both heaters.
Questions buyers ask
What heaters does the FD-4 have?
Six Spectrum Plus infrared heaters plus a Harvia Vega Compact traditional heater mounted on the front interior wall.
What is included?
The traditional heater, the Spectrum Red Light panel and the installation and operation manual are listed.
What power does it need?
Infrared: 120V, 15 amp, 1,750W. Harvia Vega Compact: 1.9 kW, 120V, 15.9 amp. The plug is NEMA 5-15P.
What is the maximum temperature?
Infrared mode is listed at 170°F. A maximum for the traditional heater is not listed.
Helpful guides
Red light therapy vs. infrared sauna: how they differ | Cold plunge and sauna combo setups | Browse hybrid saunas
Not sure which size or configuration fits your space? Call 1-762-214-2594 (Mon-Sun 9am-9pm EST) or request a quote, and our product specialists will help you compare options and plan delivery and installation.
Intended for general wellness use, following the manufacturer's instructions. Not intended to diagnose, treat, cure, or prevent any disease or medical condition. Results vary.
- Hybrid heating: infrared plus Harvia Vega Compact traditional heater
- 6 Spectrum Plus infrared heaters
- Spectrum Red Light panel (650nm) with color lighting
- Clear A-grade Canadian Western red cedar interior
- Thermal Plus aspen exterior with fully insulated walls
- Indoor design for two people
- Touchscreen controller
- Hi-fi audio
- UL Listed Spectrum Plus infrared heaters
| Capacity | 2 persons |
|---|---|
| Exterior dimensions | 48.8 in W x 48.8 in D x 83.1 in H |
| Interior dimensions | 44.5 in W x 45.1 in D x 75.2 in H |
| Infrared heaters | 6 Spectrum Plus (3 back wall dual-wave, 1 under bench, 2 side walls) |
| Traditional heater | Harvia Vega Compact 1900, 1.9 kW (front interior wall) |
| Infrared power | 1,750W, 120V, 15 amp |
| Traditional heater electrical | 120V, 15.9 amp |
| Plug | NEMA 5-15P |
| Infrared mode temperature | 170°F |
| Red light | Spectrum Red Light panel, 650nm |
| Interior wood | clear A-grade Canadian Western red cedar |
| Exterior | Thermal Plus Canadian aspen, fully insulated walls |
| Heater certification | Spectrum Plus infrared heaters are UL Listed |
| Manufacturer warranty | 10-year sauna, 2-year Harvia heater (see the manufacturer's warranty guide) |
- ## The sauna
- Cedar and aspen cabin with fully insulated walls
- ## Heater & controls
- 6 Spectrum Plus infrared heaters
- Harvia Vega Compact traditional heater
- Touchscreen controller
- ## Accessories
- Spectrum Red Light panel (650nm)
- Installation and operation manual
Shipping & Delivery: Most orders ship free within 1-2 business days via curbside delivery. Need it brought inside and set up? Choose White Glove Delivery at checkout and our team will follow up with pricing and scheduling.
Warranty: Warranty coverage varies by manufacturer and product. Contact our team before purchase for the specific warranty terms on this item, or reach out any time after your purchase with a manufacturer defect concern — we'll help you through the process.
Product manuals, installation guides, and spec sheets for this item are available on request. Contact our product specialists and we'll send you the documentation.
Here is what ships with this model. Everything in the checklist is included in the price; anything marked Optional is not included unless you add it.
The sauna
- Cedar and aspen cabin with fully insulated walls
Heater & controls
- 6 Spectrum Plus infrared heaters
- Harvia Vega Compact traditional heater
- Touchscreen controller
Accessories
- Spectrum Red Light panel (650nm)
- Installation and operation manual
Not sure which configuration you need? Call 1-762-214-2594 and our team will confirm exactly what arrives with your order.