Hot water cylinders - the most efficient in the world

OSO Hotwater is the world’s largest manufacturer of stainless steel unvented hot water cylinders

Manufactured in Norway since 1932, OSO cylinders have won countless awards for quality and sustainable production. 

Unvented hot water cylinders connect directly to the water main and provide high pressure hot water to showers and taps throughout the building

 

Register your cylinder for warranty and book for service and or repair with OSO’s Approved Service and Warranty team.

Joining OSO Approved Certified Installer gives you access to approved spares, training, and work revenue opportunities.

OSO Partner offers better rewards, more support, promotions, training and exclusive events.

At OSO Spares you can buy all current and historic official OSO cylinders and spare parts.

Quality

Throughout 60 years we have perfected the stainless steel heater. The combination of material choice, robotized production and intelligent solutions gives the OSO products unbeatable lifetime.

Energy efficiency

OSO heaters have the lowest heat loss on the market, and are designed to give maximum performance. This gives our products the lowest power consumption and a unique lifespan economy for our customers.

Environment

50 years of efforts and investments to unite people, environment and industry, and for this given several awards. In three generations our objective has been the same:

Protect Our Beautiful Planet!

News

THE FUTURE ROLE OF HOT WATER CYLINDERS IN BALANCING GRID DEMAND

The Hot Water Association (HWA) and Energy and Utilities Alliance (EUA) were hosted by ...
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4 WAYS OF SAVING ENERGY ON WATER HEATING

OSO are being asked regularly and understandably about water heating ...
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ONE SIZE DOESN’T FIT ALL

 One size doesn’t fit all Isaac Occhipinti, Head of External ...
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Innovation timeline