Finnmark
FD-4 Trinity Hybrid Infrared & Steam Sauna
A 2-person hybrid cabin combining a 1750W infrared array with a 1.9kW Harvia traditional stove and red light therapy, on a standard 120V/15-20A circuit.
$7,795$9,985
Check PriceFinnmark
FD-5 Trinity XL Hybrid Infrared & Steam Sauna
A 4-person hybrid cabin combining a 2700W full-spectrum infrared array with a 4.5kW Harvia KIP traditional heater, backed by a stated 10-year warranty.
- Capacity
- 4 people
- Installation
- indoor
- Dimensions
- Exterior 75"W x 64"D x 83"H; interior 71"x57.5"x75.5"
- Power
- 240V, 18.8A, NEMA 5-15P plug — dedicated circuit
$8,995$10,000
Check Latest PriceWe may earn a commission if you purchase through this link, at no extra cost to you. Price and availability are set by The Sauna Place and subject to change. Information last verified September 11, 2026.
FD-5 Trinity XL Hybrid Infrared & Steam Sauna
$8,995
Who It's For
- Families who want one cabin that covers both a quick infrared session and a full 4-person steam sauna
- Buyers with 240V service already available or planned
Key Specifications
- Heaters
- Spectrum Plus infrared array (2700W, max 170°F) plus Harvia KIP45B traditional heater (4.5kW, max 190°F)
- Cabin Material
- Antimicrobial Western Canadian Cedar interior, Thermo-Aspen exterior
- Exterior Dimensions
- 75"W x 64"D x 83"H
- Weight
- Not stated on the manufacturer listing — confirm with your dealer before planning delivery
Key Features
- Independently controlled full-spectrum infrared and traditional steam heating
- Two-tier seating for up to four people
- 192-diode red light therapy panel (650nm)
- 5" touchscreen controller with Bluetooth and marine-grade speakers
Installation
Indoor installation; requires a dedicated 240V/18.8A circuit
Warranty
10-year warranty on the entire sauna, with a lifetime warranty specifically on the Spectrum Plus infrared heaters, as stated by the dealer listing.
See how the FD-5 Trinity XL Hybrid Infrared & Steam Sauna stacks up against alternatives in our Best Home Saunas of 2026 comparison.
Pros
- + Stated 10-year warranty on the entire sauna, plus a lifetime warranty on the infrared heaters
- + Largest hybrid cabin in Finnmark's Trinity line — genuinely fits four adults
- + Estimated running cost as low as $0.30-0.40/hour on infrared mode per the manufacturer
Cons
- − Requires a dedicated 240V/18.8A circuit — an electrician is likely needed
- − Meaningfully heavier and larger than the 2-person FD-4 Trinity; measure doorways and delivery paths first
- − Premium price point even at the discounted rate
Alternatives to Consider
Editor's ChoiceGolden Designs
Forssa Edition 3-4 Person Sauna (GDI-7203-01)
5.0(1)
A 3-4 person traditional steam sauna with Canadian Hemlock exterior and Red Cedar interior, built around an 8kW electric stove.
$8,999
Check PriceGolden Designs
Nora 2-Person Outdoor Hybrid Sauna (GDI-8222-01)
An outdoor hybrid cabin combining a Harvia traditional stove with near-zero-EMF infrared panels, powered from a single 240V circuit.
$14,999$18,999
Check PriceFrequently Asked Questions
How much does a home sauna cost?
Compact 1-person infrared cabins start under $2,000, while larger family-size cabins and traditional wood-fired units can run $6,000–$8,000 or more.
Do I need an electrician to install a home sauna?
Compact infrared cabins often run on a standard household outlet, but larger infrared cabins and most traditional heaters require a dedicated circuit installed by a licensed electrician.
Indoor or outdoor — which should I choose?
Indoor cabins are faster to install and keep the sauna close to living space; outdoor cabins free up interior square footage but need a weatherproof build and foundation.