The Instanta WM7 SS is the smallest of Instanta's classically designed wall mounted water boilers. The boiler is compact but powerful and reliable. Ready to use in just 12 minutes this boiler can produce 28 litres every hour after the initial draw off of 3 litres. The unique Instanta digital display provides a clear indication of the boiler status, advance notice of scale build up and easy to read diagnosis of any service problems. The WM7 SS also features bead blasted stainless steel casing, thermistor control for constant temperatures of 98°c, large non drip tap, long life incoloy element.Easy installation, maintenance, cleaning and de-scaling, provision for concealed services. New modifications for 2010 models now include a 7 day timer and Filter Monitor.