The scheme will run throughout September and will offer homeowners a free personalised energy report, which will give them hints and tips on how to reduce their bills.
Lynn Melling, manager of the EST, said: "Many of the actions we recommend will cost little to put into practice yet will have fantastic results.
"With subsidies available for everyone, regardless of their income, these measures can often pay for themselves within around 18-months."
Meanwhile, people who have never used price comparison sites to switch their energy supplier could be paying as much as £300 a year more than those who have, according to thisismoney.co.uk.
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.