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High Efficiency

OSO’s water heaters shall provide the user with hot water for up to 30 years. Due to this, the superior goal for the production process is to construct and design highly efficient products.

Our products incorporate many efficiency improving details.


For instance OSO uses a highly efficient cold water diffusor to reduce the turbulence in the cylinder when tapping water. The electric immersion heater is also angled downwards on products to ensure the cylinder is heated all the way to the bottom.


Our cylinders also maintain a higher temperature than most others, providing even more hot water. Our blending valves ensure scolding is not an issue. Combined with a very low heat loss, this makes OSO’s water heaters the most efficient on the market.

Extremely Low Heat Loss
High Corrosion Resistance