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sadler's wells theatre, London

Careful design of the auditorium and auditorium diffusers has ensured that air may be supplied at 16-18°C from high-level diffusers to achieve an average auditorium room temperature of 23-25°C.

This temperature is allowed to rise slightly higher in summer to cater for the lighter clothing the audience is 'expected to wear'. During winter, when heavier clothes are worn, the lower external temperatures are used to achieve a slightly lower average auditorium temperature of 22-24°C.

The bore hole water cooling system has meant that in place of the traditional noisy chillers, a simple pump set is used, thereby reducing space and capital costs (approx. £30,000), which also considerably reduced running costs.