Tank
Copper
Grade C106
BS2870 (1980)

Coil(s)
Copper
BS2871 part 1 (1971)

Brazing Alloy
BS1845 (1984)

Insulation
Closed Cell Polyurethane
Nominal thickness 20mm.
Mean rate of heat loss<2 watts per litre.
Flame retardant to BS699 (1983)
Foaming agent non-CFC