Many high performance showers use over 20 litres of water per minute so fuel bills go sky high as do water rates where the supply is metered. In fact, some showers can use more water than a good bath, in less than five minutes.
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The detrimental effect a loss of power can have on critical lighting has been overcome for decades with the use of emergency lighting systems especially in public buildings. Backup power, usually in the form of a central battery system, is essential for critical and emergency lighting. Traditionally UPS have been overlooked for lighting...