What can you do to make that refrigerator at home efficient? After lighting and fans, the refrigerator is the single largest energy guzzler in India. You’d be surprised at how much energy you can save by simply following a few do’s and don’t’s. Set the temperature only as low as needed. Don’t put anything hot in the fridge—allow food to cool to room temperature first. Place the fridge in a spot that is not too congested, to allow hot air to circulate away and keep the fridge from retaining heat. Defrost before the ice grows more than quarter-inch thick. Ensure that the gasket is in good shape; you don’t want cold air escaping out! And, if you have a model manufactured before 1998, you might want to consider replacing with the newer energy-efficient one. You’ll save money, too, with your electricity bill falling.