OSO Unvented cylinders

When scheduling a complete installation, it makes absolute sense to source all your system needs from one supplier. Chatsworth distribute the renowned OSO Unvented Cylinder, which is a top end unit made from stainless steel, using 'bubbletop' expansion and with a proven performance. With a wide range of sizes to choose from, the unit has an exceptional installed life, complete with a 25 year guarantee on the cylinder itself.

2 x 3kW immersion heaters pre-fitted at the factory save valuable on-site time.

All models are suitable for connection to all off-peak electricity supplies. Hard wiring between the thermostat and the immersion heater is also factory fitted.

Full technical specification sheets are available on request. Please see chart below for sizes and capacities. We also offer a solar cylinder for connection to solar panels. All 210, 250 and 330 litre cylinders are available at an extra cost with 1" cold feed and hot outlet connection.

USO unvented cylinders

See below for full details.

Model code	OSO MINI RM5	20 RD 100 †	20 RD 125 †	20 RD 170 †	20 RD 210 †	20 RD 250	20 RD 330
Capacity litres	5	100	125	170	210	250	330
Height H mm	430	720	900	1150	1400	1600	2090
Diameter D mm	200	580	580	580	580	580	580
Dimension A mm	40	40	40	40	40	40	40
Weight full kg	11	127	159	209	255	297	391
No of 3kW elements*	1	1	2	2	2	2	2

† Has wall fixing bracket *Factory fitted