How to make your laundry more energy-efficient | OVO Energy
A 6-7kg energy-efficient washing machine will be about right if there are just two of you, but you'll probably need a 7-8kg machine for a family of four or 9kg plus if there are more of you. If you're on a water meter, be sure to check on each machine's water use before you decide which is the most economical washing machine.
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