The UK Health and Safety Executive indicates that there is no maximum workplace temperature because some environments run hot by design. Ok, but surely every workplace should still try to offer workers a cool refuge from excessive heat? Attribution follows. Source: www.hse.gov.uk/temperature/...

Temperature in the workplace: Is it too hot or cold to work? - HSEIn offices or similar environments, the temperature in workplaces must be reasonable.www.hse.gov.uk