7 Copper hot water tanks and cylinders
An Economy 7 cylinder is designed to exploit an 'off-peak'
electricity supply typically available throughout the night.
A feature of an E7
cylinder or tank is the addition of a second immersion heater port (unlike a
standard direct cylinder that only has one).
The lower of the two
elements is typically connected to the economy supply/tariff, the upper
heater is usually used as a boost element and operated manually when
demand for hot water is high. Our cylinders are supplied with the two
immersion heater bosses (the bit you screw the heater into) but
immersion heaters are sold separately. Please enquire.
Economy 7 cylinders have an insulating layer approx nominal 50mm thick
performance. You must add this to the dimensions shown on the table below
for over all measurement.