The oil-fired boilers of Fawley Power Station are contained within a central core rising above the turbine hall. The walls are a close zig-zag of glass, formed into adjacent triangular columns rising until, just below the flat roof, they taper between inverse columns slotting downwards. The thick marine-grade glass gives a translucent, crystalline effect.
The four boilers were manufactured by John Thompson Ltd. and are of the La Mont Forced Circulation type. They could produce up to 441 kg/s of steam each. At the superheater outlet the steam was at a pressure of 165 bar and a temperature of 541 degrees C.