Europe’s leading manufacturer of stainless-steel cylinders
OSO Hotwater is one of the largest manufacturers of Word class electric and indirect stainless steel hot water cylinders. Manufactured in Norway since 1932, OSO cylinders have won countless awards for quality and sustainable production. We can offer a large selection of hot water cylinders adapted to renewable energy systems and electric domestic hot water cylinders.
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
OSO Hotwater Group Announces New Establishment in New Brunswick.
New Brunswick — OSO Hotwater Group, a leading supplier of smart stainless steel hotwater tanks …
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Innovation timeline
1932
Norway’s first autogenous welded storage tank is produced at Oslo Svesiebedrift
1935
Welded cooking pots and wood boilers complements the range of products
1938
Development of wood-burning boilers which provides both heat and hot-water
1941
Production of potato collector cogs and planting equipment during the war
1945
Production of copper-lined storage tanks 200 – 50,000 litres resumes
1955
Provision storage tanks tripled the capacity while only taken half the space
1957
“TRIPLEX” and “COMPACT” heating units for oil and wood/electrical units
1959
“NORTHEM” integrated heating unit and storage tanks is launched
1968
The “SAFE” system – triple-valve and surface mounted thermostat is introduced
1968
Heaters heated directly by electricity simplifies installation and operation
1968
First in the world to produce stainless steel storage tanks which increases lifespan.
1979
The “SUNSAVER” solar-heated storage tanks are launched
1980
Top-mounted mixing valves becomes standard, resulting in huge resource savings
1984
The tank-in-tank unit “PROGRESS” water heater line is introduced for heat pumps
1985
The “TURBO” system with plate exchanger revolutionises heat-up times
1988
The “EXPRESS” storage tanks with flip/flop thermostat heats water 3 times faster
1993
The "UNIVERSAL" electric boilers 15-45 kW without contactors makes installation easier.
1994
“THERMO TOP” reduces heat loss from standard storage tanks by 20%
1999
The “MAXI” large storage tanks 500-1000 liters becomes industry standard
2001
The warranty is doubled on the stainless steel pressure tank
2004
The new “ECO FOAM” insulation saves more than 500 million kWh in 10 years
2010
“EXPANSION” is introduced with a fully integrated expansion solution
2015
As a consequence of the implementation of the ErP directive in Norway,
integration of vacuum panels improves insulation
2016
The “DELTA” series receives rating “A” from ErP – best in class
2018
OSO Manufacturing AB starts production of large size heaters in stainless steel, with volumes up to 15,000 liters!
2020
OSO releases "VERSA", "WALLY", and the "OPTIMA" series
The Future
Development never stops, and OSO has a lot we are looking forward to share with our customers in the future!