This is OSO
Vision
Stainless steel water heaters with class leading quality and efficiency.
Environment
50 years of continuous efforts environmental awareness with industrial efficiency. We are proud of our contribution to protect our beautiful planet
Quality
For six decades we’ve perfected the stainless steel water heater. The ideal combination of premium materials and automated manufacturing makes our products last longer.
Innovation
We design for minimum heat loss and maximum energy efficiency, without compromise, making our customers’ heating system cost-efficient.
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 liters 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
“NORTHERM” integrated heating unit and storage tanks is launched.
1968
The “SAFE” system with its triple-valve and surface mounted thermostat is introduced.
1968
First in the world to produce stainless steel storage tanks which increases lifespan.
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 “PROGESSS” water heater line is introduced for heat pumps.
1985
The “TURBO” system with plate exchanger revolutionizes 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
ECO FOAM saves more than 500 million kWh in heat loss over 10 years.
2007
“ENERGY SAVER” for grey water reuse results in huge Energy Efficiency savings.
2008
The “OPTIMA” line triples the capacity and increases the efficiency for heat pumps.
2010
“EXPANSION” is introduced with a fully integrated expansion solution.
2012
“OPTIMA TRIPLE COIL” is the industry’s most advanced heating central.
2015
The “DELTA” series receives rating “A” from ErP – best in class.
2017
NANOPUR and VACUUM panels saves 200 million kWh over 10 years.
The future
The development never stops, and OSO has a lot of exciting things, we look forward sharing with our customers in the future
