The ratings of the newer fridges are 4 star. This standard was introduced several years ago. There are still a large number of fridges in operation that have ahigher power usage however over time they will be replaced.
To ensure the lowest level of poewer is used in the fridge you can follow some basic steps. Only opent the door when you know what it is you require. Never leave the door open, have the temperature adjusted so the products are cool in the fridge no frozen and thisame for the freezer, ice cream should be soft not rock hard..
