Infrared heat and cold immersion offer different experiences, with each bringing something distinct to a home wellness routine.
Thermiva brings both together in one focused collection.
Each sauna combines integrated infrared heating, straightforward controls and built-in cabin features designed around the experience inside. Choose from one, two and three-person designs to find the right balance of space, capacity and comfort for your home and how you plan to use it.
£1,800.00
£2,300.00
£2,800.00
£1,800.00
£2,300.00
£2,800.00
There’s no single way to create a cold setup at home. The right choice depends on your available space, preferred plunge style and how much control you want over preparation.
A spacious outdoor plunge with an inflatable design, giving you a dedicated place for cold immersion without committing to a permanent installation.
Made from red cedar with a deep barrel design, the Nord creates a more permanent cold plunge for indoor or suitable outdoor wellness spaces.
Add active water cooling, circulation and filtration to a compatible cold plunge, reducing the need to continually prepare your water with bags of ice.
A spacious outdoor plunge with an inflatable design, giving you a dedicated place for cold immersion without committing to a permanent installation.
Made from red cedar with a deep barrel design, the Nord creates a more permanent cold plunge for indoor or suitable outdoor wellness spaces.
Add active water cooling, circulation and filtration to a compatible cold plunge, reducing the need to continually prepare your water with bags of ice.
UNDERSTANDING HEAT & COLD
Infrared heat and cold-water immersion create very different environments. Compare the practical differences before deciding what fits your routine.
LEARN MORE45-60°C
Typical Heat Range
20-30 MIN
Typical Session Length
10-15°C
Studied Temp Range
2-5 MIN
Typical Exposure Time
EVIDENCE, CLEARLY PRESENTED
Explore peer-reviewed studies on sauna bathing, infrared heat and cold-water immersion.
A systematic review found possible cardiovascular, respiratory and quality-of-life benefits across 40 clinical studies, while noting that many studies were small and better trials are needed.
Hussain & Cohen, 2018 · Evidence-Based Complementary and Alternative Medicine
In a small crossover trial, a 20-minute infrared-sauna session was linked with lower perceived muscle soreness and a smaller drop in jump performance. The sample was limited to 16 male basketball players.
Ahokas et al., 2023 · Biology of Sport
A 2025 systematic review and meta-analysis found some time-dependent effects on stress, sleep and quality of life in healthy adults, but emphasised small samples and limited long-term evidence.
Cain et al., 2025 · PLOS ONE
For education only. Findings relate to the study protocols and populations described and do not show that any product diagnoses, treats, cures or prevents disease. Speak with a qualified health professional if you have a medical condition, take medication or are pregnant.
