Designed, engineered and manufactured in the UK, with a robust steel-cased unit and copper interior, suitable for over-sink or under-sink (in conjunction with optional additional vented taps) uses in commercial or industrial situations such as canteens, workshops, and office kitchens. The unit is housed in a tough metal case to withstand the rigors of daily use and any knocks over the years. This model of the Heatrae Sadia Express Water Heater has a 7 Litre capacity and 3 Kw. It is part of the Heatrae Sadia Express range. This product is a Vented Point Of Use water heater and is electric. Features include a 7 Litre capacity, 3kW output, copper interior, adjustable thermostat, fast heat up time, and easy installation. It comes with a 2 year guarantee.