Solar Twin-Coil Cylinder 198 Litres

Sunspeed2 Solar twin coil cylinders indirect vented 198 Litres

In a ‘Sunspeed 1’ or ‘Sunspeed 2’ the Sunspeed Coil is designed to heat the
full contents of the cylinder, whilst the conventional fuel coil in a
‘Sunspeed 2’ is positioned and rated to heat 60% of the contents, unless
otherwise specified. Example: A ‘Sunspeed 70’ would raise 450 litres of
water from 10C to 49C,with a primary flow temperature of 55C in one hour,
with a minimum heatsource output of 27kW.

To raise the secondary contents closer to the primary flow temperature in
one hour would require significantly larger heat exchange surfaces. That
means to raise 450 litres from 10C to 54C with a primary flow temperature
of 58C would require approximately twice the heat exchange surface, i.e.
a 41kW unit.

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