Misty solution

Published: Friday 31 January 1997

Less water is one reason why some homeowners cannot install a fire sprinkler system. Soon, they may have another option, a mist system. The water droplets produced by a conventional sprinkler nozzle are larger than 1,000 microns. A mist nozzle propels water through a much smaller orifice to create droplets of 600 microns or less. This gives greater surface area to the same amount of water, so it absorbs heat more readily and suppresses a fire more efficiently. As a result, mist nozzles might use about one-third as much water as conventional nozzles ( Popular Science , October '96 ).

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