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| Model | Interior / Exterior | Infrared + red light | Traditional heater | Dimensions | From |
|---|---|---|---|---|---|
| Finnmark FD-4 Trinity | Canadian Cedar / Thermo-Aspen | 120V, 15A plug | Harvia Vega, dedicated 20A | 48″ × 48″ × 83″ | $7,795 |
The Finnmark FD-4 Trinity is currently the only two-person hybrid in Topture’s range. It measures 48″ × 48″ × 83″, pairs a Canadian Cedar interior with a Thermo-Aspen exterior, and includes red light hardware alongside both heat systems. For the four-person equivalent, see the Finnmark FD-5 Trinity XL.
A 2 person hybrid sauna runs infrared panels and a stone heater independently, so the same cabin gives you two different sessions.
The infrared side warms your body directly at roughly 120–140°F, reaches temperature quickly and suits a shorter weeknight session. The traditional side heats the air to 170–190°F and takes water on the stones for löyly, which is the classic Finnish sauna session.
The two systems have separate electrical supplies and separate controls. Check the FD-4 operating instructions for how Finnmark intends the modes to be combined within a single session.
The Finnmark FD-4 Trinity measures 48″ × 48″ × 83″ and needs a 48″ × 48″ floor area.
At 83″ tall it clears a standard 8-foot ceiling with room to spare, though a finished basement at 84″ leaves almost none. Measure to the lowest obstruction, since ductwork and joists decide this more often than the slab does.
Leave clearance behind and beside the cabin so panel heat dissipates rather than sitting against drywall, and check the manual for the model’s stated figures. For the full room-fit sequence, see 2 person indoor saunas.
The Finnmark FD-4 Trinity uses two separate electrical supplies. Its infrared heaters and red-light panel plug (NEMA 5-15P) into a dedicated 120V, 15-amp outlet, a circuit that serves nothing else. The included Harvia Vega traditional heater requires its own dedicated 20-amp circuit, and Finnmark’s install manual specifies a licensed electrician for that connection.
So the infrared and red-light side plugs in once that dedicated outlet exists, while the Harvia heater is hard-wired by a licensed electrician on its own circuit. Finnmark’s manual asks that no other devices share the infrared circuit.
Confirm both circuits on the product page before booking work, and read Topture’s sauna electrical requirements guide. Always consult a licensed electrician — requirements vary by local code and jurisdiction.
A 2 person hybrid sauna costs more than a dedicated cabin of the same size, and that premium only pays back if both systems get used.
Topture’s two-person infrared cabins start at $2,698 and two-person traditional saunas at $3,496, against $7,795 for the FD-4 Trinity. If one heat type is clearly what you want, the specialist is the better buy and does its single job without compromise.
The hybrid earns its price when two people disagree about heat, or when one cabin is all the room allows and you genuinely want both. Compare 2 person infrared saunas and 2 person traditional saunas before committing.
Topture sells hybrids next to dedicated infrared and traditional cabins, so the team can tell you when a hybrid is the wrong purchase.
For every hybrid cabin Topture carries at any capacity, see hybrid saunas.