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Save £s on dishwasher tablets.....
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It's been fairly thoroughly researched:
http://www.landtechnik.uni-bonn.de/ifl_research/ifl_research_project.php?sec=HT&no=10
(that's in German)
http://www.mtprog.com/ApprovedBriefingNotes/PDF/MTP_BNW16_2007May2.pdf
(English)
Modern dishwashers use very little water, thus they use very alot less energy to heat the small amount of water. The water is only heated once, rinse water can be heated by the outgoing wash water.0
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