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OSO Hotwater (UK) Ltd

OSO Hotwater is a Norwegian supplier of stainless steel unvented cylinders and electric flow boilers. OSO is recognised as a market leader and innovator in the water heating sector.

OSO will be launching the Delta cylinder, the first complete range of A rated cylinders available in the UK, in the autumn of 2015. Delta employs revolutionary new insulation techniques and will be available in indirect cylinders from 120 - 300 litres, all at A rating for single coil units. Delta units will be available for connection to boiler, heat pump and solar thermal collectors.

The European  Energy related Products Directive (ErP) commences on 26th September 2015 and will require that all hot water cylidners will carry an A - G energy label.

OSO will create a new market place for discerning customer looking for the most energy efficient products available.

The OSO Super S is a revolutionary design in unvented cylinders. With all connections at the top of the unit, pipes and cables are hidden from view and the cylinder offers the neatest possible installation.

All valves and connecting pipes and expansion vessels are hidden under an insulated lid that enables the heat losses to be kept to a minimum. Large capacity heating coils ensure that heating performance is also highly impressive.

A unique multifunction valve is factory fitted at the top of the cylinder. With the installer simply bringing the primary and secondary pipes to this point, installation is made extremely easy. Full instructions and a pipe positioning template are provided with the cylinder.

The OSO Ecoline is a generic style of stainless steel cylinder of superior quality and performance available at competitive prices.

OSO Termo electric boilers are the only weather compensated electric boilers available on the domestic market and are ideal for small properties in off-gas areas.


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  • Endeavour House
  • Colmet Court
  • Team Valley Trading Estate
  • Gateshead
  • NE11 0EF
  • 0191 482 0800
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