Harvia Onni Onyx Duo infrared sauna
- For 2 persons
- Full-spectrum infrared
- Intuitive touch screen
- Tailored to your needs
- Support with planning and installation
- A smooth process from idea to sauna
Product description
An infrared cabin for two that delivers balanced warmth without pre-heating. Full-spectrum back radiators and carbon panels create even heat distribution. Black waxed hemlock and red cedar give the cabin a modern and composed character.
Key facts - Infrared sauna
Full-spectrum infrared warmth
Delivers a balanced mix of short and long infrared waves for deep yet comfortable heat.
Certified full-spectrum technology
Tested and certified by the Seibersdorf Radiation Lab for safe and reliable infrared performance.

Built for long term use
Replaceable infrared lamps and high-quality components ensure durability and easy maintenance.
From the world's leading sauna brand
Backed by over 75 years of experience, Harvia delivers trusted quality and innovation in heat and wellness.

About
Onni Onyx Duo brings immediate infrared warmth to shared relaxation. The heat is available quickly and directly, without heating the entire room volume first. Each seating position includes a full-spectrum radiator behind the back, complemented by carbon panels at the sides and lower body. This configuration creates steady and evenly distributed warmth that surrounds the body comfortably. The dark exterior in black waxed hemlock gives the cabin a confident, modern appearance. Red cedar inside adds warmth and natural depth. The glass front keeps the design visually open. Operation is managed via a large touch screen. Adjustable chromotherapy lighting and integrated Bluetooth audio allow individual customization. The structured construction with integrated components enables installation within a few hours and supports long-term daily use. Onni Onyx Duo is shared infrared comfort — balanced in warmth, composed in design, and made for consistent everyday wellbeing.
Specifications
- SKU
- SGN1310CBT
- User capacity
- 1-2
- Floor area
- 1.5 m²
- Calculatory sauna volume
- 2.16 m³
- Exterior surface material
- Hemlock with black wax
- Interior surface material
- Red Cedar
- Bench material
- Red Cedar
- Door type
- 8 mm single pane safety glass, clear
- Door knob type
- Vertical handle wooden
- Window type
- 8 mm single pane safety glass, clear
- Infrared temperature range
- 20–70 °C
- Infrared voltage
- 230 V
- Infrared radiator type
- Carbon, Full-spectrum
- GTIN
- 6417659046664
Size & Weight
Product
- Height
- 2000 mm
- Width
- 1073 mm
- Depth
- 1298 mm
- Net weight
- 161.5 kg
Package
- Height
- 650 mm
- Width
- 1380 mm
- Depth
- 2200 mm
- Gross weight
- 264 kg
Files
Everything included for the full sauna experience
Exterior
- Hemlock wall boards with external black wood wax 8 mm tempered clear glass front
Interior
- Red Cedar (backrest, heater frame, and bench) Horizontal slats 7" touch display LED color lighting Bluetooth music system with speakers
Heating Equipment
- 2 × full-spectrum infrared heaters, back (350 W) with individual dimmers 2 × Carbon infrared heater, sides (380 W) 1 × Carbon infrared heater under bench (200 W) 1 × Carbon infrared heater floor (200 W)
Accessories
- Instructions for installation and use

Our materials
Find answers to the most common questions
Infrared benefits
Deep heat for total wellbeing.
Infrared warmth reaches deep beneath the skin to gently ease tension in muscles and joints. It helps reduce stiffness, soothe soreness, and support recovery after exercise or long days. Regular sessions help maintain flexibility and support long-term joint and muscle health.
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