The expert went on to explain that sometimes computers are left on when it doesn't need to be.
He said: "There's a high statistic of computers that are left on overnight and at weekends, because people can't be bothered to turn them off.
"It's particularly businesses, but homeowners too."
Previous figures released by Nigel's Eco Store found that UK households could save up to £400 a year on food, electricity and grocery bills by improving their green credentials.
Mr Berman has also previously stated that taking steps such as only boiling the right amount of water can help homes cut their energy bills.
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