Borealis™ Gen 5
Five generations in, built to last in the tropics. The Borealis is TUNDRA's all-in-one chiller and heater, refined across five generations of real-world use. It cools a plunge to 3°C and heats it to 42°C on demand, holds the temperature, and keeps the same water clean for weeks. It is engineered to survive Singapore's heat, rain and humidity.
What sets Gen 5 apart:
- Commercial-grade pump (up to 34 L/min, 170 W). Most budget chillers use a ~20 L/min, ~88 W pump that runs hot and wears out. Stronger, cooler-running flow means faster turnover, clearer water and more reliable temperature holding.
- Corrosion-built for outdoors. Black powder-coated stainless-steel housing, a stainless-steel heat exchanger, and IPX4 weatherproofing, so heat, humidity and rain don't rust it out.
- More robust piping: fewer stress points and leaks over years of daily use.
- Cools and heats (3 to 42°C): run it as an ice bath or a warm soak.
- Two engines: Gen 5 Pro (1.0 HP) and Elite (2.0 HP) to match your tub and our climate.
- Fits any tub: TUNDRA plunge, custom pool or standard bathtub, via quick-connect hoses.
- Ozone + 20-micron filtration, Wi-Fi app control, transport wheels, plug-and-play on a standard socket, energy-saving mode.
- Backed locally: 1-year warranty and an in-house Singapore team.
Already own a tub? The Borealis turns it into a precision cold plunge. Not sure which HP is right for your setup? Read How to Choose an Ice Bath Chiller →
Want it to match an Inari or Tavik? See the chiller cover in Weathered Oak and Midnight Oak →
Care & maintenance: Keep your Borealis™ Gen 5 performing its best. See the full Care, Maintenance & User Guide →
Delivered, installed and commissioned by our own team. Included for mainland Singapore.
Serviced by us, in Singapore, for the life of the product. We also deliver worldwide, with delivery included in the price. Delivery times by country
Borealis™
Key Benefits
Heating & Cooling
Advanced Ozone Sterilization
Efficient Filtration
Touch Panel with Wi-Fi and Smart App Control
Portable Design
Stainless-Steel Weatherproof Housing
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Built for the tropics
Singapore’s heat, rain and humidity destroy cheap chillers. The Borealis has a black powder-coated stainless-steel housing, a stainless-steel heat exchanger for corrosion resistance, and IPX4 weatherproofing — built to live outdoors and keep running.
02
Commercial-grade pump
Gen 5 uses a commercial pump rated up to 34 L/min at 170 W.
Most budget chillers run a ~20 L/min, ~88 W pump or lower that runs hot or wears out. Stronger, cooler-running flow means faster turnover and steadier temperatures, year after year.
03
Cools and heats, 3–42°C
One unit, two uses. Chill a plunge down to 3°C, or heat it to 42°C for a warm soak — with precise temperature holding either way. Useful all year in our climate.
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Clean water, less upkeep
Ozone sanitation plus 20-micron filtration keep the same water clear for weeks. Wi-Fi app control sets temperature and schedules from your phone, and an energy-saving mode keeps running costs down.
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Refined over 5 generations
Every generation fixed what we learned from the last — more robust piping, fewer leak points, better reliability.
Backed by a 1-year warranty and an in-house Singapore team.
Precision Cooling & Heating (3°C – 42°C). One powerful engine for total thermal control.
Master Your Elements.
Return to Yourself
How it feels
Wide awake
A rush of alertness within seconds of getting in.
Clear head
A calm, focused feeling once you step out.
Lighter legs
Tired muscles feel fresher after hard training.
Built resilience
Each plunge is a small win that carries into the day.
What the research says
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Randomised trials in a meta-analysis that found cold water immersion after exercise reduced muscle soreness compared with passive rest.1
11-15 °C
Water temperature that gave the best soreness results in these trials, with 11 to 15 minutes in the water.1
5 min
In 20 °C water raised positive mood scores in a study of 33 adults.2
- 1. Machado AF et al. Sports Medicine, 2016. Meta-analysis of 9 randomised trials, 169 participants.
- 2. Yankouskaya A et al. Biology, 2023. 33 adults.
How it feels describes experiences people commonly report. These are personal experiences, not scientifically established effects, and they vary from person to person.
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. Full references on our science page.
Product specification
3°C to 42°C (Cooling + Heating)
Technical guide
Borealis Gen 5: technical data, planning and owner's guide
Pro and Elite. Choosing the model, dimensions, space and site, delivery, connecting to a TUNDRA tub, a tub with fittings or by drop-in, and full technical data. Then safety, set-up and first start, touch panel and app, care, draining and storage, troubleshooting and warranty.
For architects, interior designers and installers. Verify all dimensions on site.
FAQ
Quick answers on delivery, installation and daily use. Can’t find yours? Our Singapore team is one email away.