Fridges are essential for keeping your food cold. When looking for your new fridge, if you like to save electricity then you need to look at the energy efficiency grade. This is rated from A to C, A being the best. The energy consumption tells you how much electricity the appliance will use. Bearing in mind that your fridge is likely to be on permanently you may be able to save on running costs by purchasing a more efficient model. The maximum interior storage capacity determines how much food and drink you can fit in your appliance. Many have a frozen food compartment, these are designed for short term storage of frozen food. Some fridges have a lower temperature chiller compartment for meat and fish and salad crispers for keeping fruit and vegetables fresher for longer. The number and make of shelves a fridge has and whether or not they are height adjustable can be a selling point of a fridge. Other features that fridges can have are automatic defrost, reversible door, bottle rack, egg tray, dairy compartment, deep door storage for bottles and cartons, adjustable door storage, drinks container with dispenser, ice maker and a flat back for easier installation and cleaning.