20 Series

High quality unvented stainless steel hot water cylinder

Design

Designed to meet and exceed the requirements of Parts G and L of the building regulations, the cylinders offer a combination of high heating performance, low standing heat losses, ease of fitting and a neat and professional appearance.

Efficency

Heat exchangers of up to 26kw ensure that condensing boilers operate at high efficiency levels, while the CFC-free polyurethane foam insulation ensures that heat losses are kept to a minimum

Cylinders

Unlike most other products, Oso cylinders do not require a separate vessel to accommodate thermal expansion of domestic hot water. The cylinders use a self-generating air gap at the top of the unit, meaning that the units are neater and more space-efficient, and are faster and cheaper to install.

Installation

Oso cylinders are very straightforward and fast to install. A full unvented kit is supplied, with one valve combining 6 different functions, further reducing installation time.

Sizes

The 20 series is available in direct and indirect heating formats and 6 sizes from 100 to 330 litres.

Downloads

'20 series' brochure (PDF - 1.51 MB)

'20 series' installation manual (PDF - 750 KB)

Further Information