Reference 01 · Bath club
Sochill Bath Club
Holland Village · 2025Full build of a bath club: a communal pool, a plunge pool with steps and a glass-fronted Finnish sauna, with the heating, chilling and filtration behind them.
Return
to yourself.
Hot and cold plunges, saunas and recovery equipment for homes, hotels, gyms and events. Based in Singapore, shipped worldwide.
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TUNDRA in 2026
Based in Singapore, at home worldwide.
5
ATP Tour tournaments supplied with TUNDRA ice baths in 2026.
3
HYROX host cities with TUNDRA recovery lounges: Singapore, Bangkok and Hong Kong.
66
Tournaments, hotels, gyms, studios and brands we have worked with.
15
Plunge, sauna and steam models, from portable tubs to glazed cabins.
3 to 42 °C
Cold plunge and hot soak in one system, held by one heater-chiller.
The engine
Borealis Gen 5
One heater-chiller for every TUNDRA plunge system. The Taiga has its chiller built in.
3 to 42 °CCools and heats the water and holds the temperature you set.
2,450 to 5,000 WCooling capacity, Pro to Elite.
3,800 to 5,800 WHeating capacity, Pro to Elite.
20 micron + ozoneFilter and ozone keep the water clean between changes. Runs from a standard power socket.
Pro and Elite
Two sizes. Pro suits most home plunges. Elite has twice the compressor and reaches cold temperatures faster in tropical heat.
| Specification | Gen 5 Pro | Gen 5 Elite |
|---|---|---|
| Compressor | 1.0 HP, 900 W | 2.0 HP, 1,660 W |
| Cooling capacity | 2,450 W | 5,000 W |
| Heating capacity | 3,800 W | 5,800 W |
| Temperature range | 3 to 42 °C | 3 to 42 °C |
| Dimensions (W × D × H) | 62.9 × 39.4 × 60.3 cm | 67.7 × 42.3 × 62.6 cm |
| Weight | 38 kg | 40 kg |
| Housing | Coated stainless steel | Coated stainless steel |
The range
Eight plunges. Five saunas.
Plunge systems run from 3 to 42 °C on the Borealis Gen 5, and the Taiga has its chiller built in. Delivered, installed and serviced by our own team in Singapore.
The Inari System
The largest plunge we build, an oval for two in black stainless steel and WPC, with the Borealis Gen 5.
View the Inari System
Taiga (Gen 2)
Acrylic hot and cold plunge with the chiller built into the tub. 2 to 42 °C.
View Taiga (Gen 2)
The Tavik System
Barrel tub with a stainless steel interior and oak woodgrain cladding, with a step.
View the Tavik System
The Aurora System
Freestanding acrylic tub with the Borealis Gen 5 heater and chiller.
View the Aurora System
The Polaris System
Rectangular acrylic tub for taller users, with the Borealis Gen 5.
View the Polaris System
The Yukon System
Portable drop stitch tub with the Borealis Gen 5. Set up in minutes.
View the Yukon System
The Lena System
Square drop stitch tub you sit upright in, 90 by 90 cm.
View the Lena System
The Oasis System
Octagonal communal tub for 5 to 8 people, 1,100 L, for events and clubs.
View the Oasis SystemSaunas
Five ways to sauna.
Finnish, infrared and hybrid cabins, for the garden, the balcony, the bathroom or a spare room.
Valo
One-person infrared sauna with glass on three sides, for indoor or outdoor use.
View Valo
Haven
Outdoor Finnish sauna with a 6 kW electric heater and a red cedar interior.
View Haven
Ignis
Infrared panels and a 4.5 kW Finnish stove in one cabin for 2 to 3 people.
View Ignis
Ounas
Indoor Finnish sauna for one or two people, with Wi-Fi control from 40 to 110 °C.
View Ounas
Equinox
Full spectrum infrared sauna in hemlock for one or two people. Plugs into a standard socket.
View Equinox
New
The Inari System
Our largest solid plunge: an oval for two adults sitting face to face. Black electroplated stainless steel inside, WPC with an oak woodgrain outside, which needs no oiling or sealing in tropical weather.
154 × 107 × 70 cmTub
About 590 LAt normal fill
Two adultsSeats
3 to 42 °CWith Borealis Gen 5
Custom and commercial builds
Designed around the space.
Built-in hot and cold plunges, saunas, steam rooms and complete recovery rooms, finished in stone, slate, travertine or timber. We work from the architect's drawings, coordinate power, water and drainage with the contractor, and commission the system on site.
01Brief and surveyUse, users, space, power and water on site.
02Concept and drawingsLayout, plant room and coordination drawings for the contractor.
03Build and installEquipment supplied, installed and connected.
04Handover and serviceCommissioning, training for staff or owners, then scheduled maintenance.
Selected reference projects
Two recent builds in Singapore.
A selection from the builds we deliver for clubs, hotels, gyms and private homes.
Reference 02 · Recovery club
Shelter
1 Raffles Link · 2025Recovery club in the CBD: built-in hot and cold plunge pools and a Finnish sauna, run on three commercial chillers.
On tour
ATP Tour 2026
TUNDRA ice baths in the players' recovery areas at five tournaments on the ATP Tour, from the clay of Munich to the indoor courts of Brussels.
“Fast and effective recovery is everything during a tournament. TUNDRA delivers exactly that.”Patrik Kühnen, former ATP player and Tournament Director, BMW Open
Fitness racing
We build and run the recovery areas at HYROX races in Singapore, Bangkok and Hong Kong: communal plunges, compression lounges and recovery zones for athletes over a race weekend.
Next: HYROX Singapore, 26 to 29 November 2026
Worked with
66 tournaments, hotels, gyms, studios and brands.
and 33 more
Evidence
What the research says
We print a health statement only when we can name the study behind it. Each line below summarises a published paper, with its limits. Most studies are small, and none of them tested TUNDRA products.
Cold water
A meta-analysis of nine trials found cold water immersion slightly better than passive rest for easing muscle soreness after exercise. [1]
The best soreness results in those trials came from water at 11 to 15 °C for 11 to 15 minutes. [1]
In one small study, adults reported a more positive mood after five minutes in 20 °C water. [2]
Finnish sauna
A 20-year Finnish study of 2,315 men linked sauna use four to seven times a week with a lower risk of sudden cardiac death. This is an association, not proof of cause. [4]
A systematic review of 40 studies concluded that regular dry sauna bathing has potential health benefits, while calling for better research. [5]
Infrared sauna
In a study of 16 athletes, a 20-minute infrared sauna after strength training reduced muscle soreness and improved perceived recovery compared with resting. [3]
Compression and massage
A 2024 meta-analysis of 17 studies found compression boots may reduce perceived muscle soreness after training. [6]
A 2023 systematic review of 11 studies found massage guns can improve flexibility in the short term. [7]
TimingPlunging straight after strength training may slightly reduce muscle growth. After weight sessions, we suggest waiting a few hours. [8]
Sources
- Machado AF et al. Sports Medicine 2016; 46(4): 503-514.
- Yankouskaya A et al. Biology 2023; 12(2): 211.
- Ahokas EK et al. Biology of Sport 2023; 40(3): 681-689.
- Laukkanen T et al. JAMA Internal Medicine 2015; 175(4): 542-548.
- Hussain J, Cohen M. Evidence-Based Complementary and Alternative Medicine 2018: 1857413.
- Maia F et al. Biology of Sport 2024; 41(4): 263-275.
- Ferreira RM et al. Journal of Functional Morphology and Kinesiology 2023; 8(3): 138.
- Piñero A et al. European Journal of Sport Science 2024; 24(2): 177-189.
TUNDRA products are wellness equipment, not medical devices. If you are pregnant or have a heart, circulatory or other medical condition, speak to your doctor first.
Plan yours
Return to yourself.
For a home, a hotel, a gym or a condominium: buy and install, or a managed monthly plan with servicing included. Tell us about the space and we send a written proposal within a week.