OSO have a full range of domestic unvented water heaters up to 300 litres.
OSO cylinders are made from 1.3mm thick stainless steel and are offered with 25 year warranty. Indirect cylinders all come with a factory fitted immersion heater.
OSO have incorporated designs with unrivalled space efficiency and labour saving installation time.
OSO lead the world in energy efficiency with the lowest standing heat loss of any comparable cylinders and best possible SAP ratings.
