Finnmark FD-4 Trinity Infrared & Steam Sauna Combo

Infrared included, plus a traditional heater. FD-4 Trinity is a 2-person indoor combo: Spectrum Plus IR plus a Harvia Vega Compact 1900 (1.9 kW) with stones, Wi-Fi control, and a Spectrum red-light panel. Exterior about 48.8" × 48.8" × 83.1"; about 86 cu ft. IR side 120V 15A 1750W up to 170°F; traditional 1.9 kW / 120V up to about 190°F. Do not add a second heater.

How it heats

Use IR, or the Vega Compact stone heater for löyly, per the Trinity manual — not two extra heaters from us. Electrician confirms both circuits. 1.9 kW is a small traditional heater sized to this 2-person cabin, not a family barrel.

What’s included

• Trinity cabin
• Spectrum Plus IR
• Harvia Vega Compact 1900 and stones
• Wi-Fi control
• Red-light panel as named

Specs

• Brand: Finnmark Designs
• Heat: Infrared + traditional
• Persons: 2
• Exterior: about 48.8" × 48.8" × 83.1"
• Volume: about 86 cu ft
• IR electrical: 120V 15A 1750W, max 170°F
• Traditional heater: Harvia Vega Compact 1900 1.9 kW / 120V included, about 190°F
• Use: Indoor combo

Downloads

• Finnmark Trinity 4×4 dimensions spec sheet (PDF)
• Finnmark Trinity 4×4 operating manual (PDF)
• Finnmark Spectrum Plus infrared spec (PDF)
• Harvia Vega Compact install and use manual (PDF)

Sizing

These are complete IR (or combo) cabins with fixed volume. Electrician confirms the circuit. Email hello@selfcaresaunas.com with site questions.

FAQ

Traditional Harvia heater included?
FD-4: Vega Compact 1900 yes. FD-5: KIP45B yes. FD-6/FD-7: no, sold separately. FD-1–3: no, IR only.

Stones included?
Only with the Trinity traditional heaters (FD-4/FD-5). IR cabins do not use löyly stones.

Indoor?
Indoor cabin.

120V or 240V?
See the electrical line in the opening — we only repeat numbers from our catalog/manufacturer sheets.

Questions? Email hello@selfcaresaunas.com. Custom rooms: Sauna Craft.