The poll into energy use also revealed that eight out of ten families are rationing warmth in their homes.
Of those surveyed, nine out of ten are wearing extra clothes instead of turning on the heating, while 56% turn it off altogether when children are not in the home.
Energy Bill campaigners today called on the Government to drive down energy bills.
More top news
A comedy drama series which details the lives of Russian expats in London will air tonight.
A 65-year-old man was attacked by a shark in Australia on Friday, leaving him with serious leg injuries.
Nearly one million people could have their homes repossessed because they do not have a plan to pay off their interest-only mortgages.