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  The refrigerator you buy can have a big impact on your energy bills. Refrigerators run non-stop, and their energy costs get troublesome in the long run. The good news is that modern-day refrigerators have become much more energy-efficient over the years, helping people cut down on utility bills.        The energy is used by the refrigerator to pump heat out of the cabinet and keep it cool. A slight amount of energy is also used to keep the cabinet from leaking, for defrosting and to light up the interior. The energy-efficiency of a refrigerator is measured in the volume cooled per unit of electric energy per day. i.e ,    Refrigerator Efficiency = Volume Cooled (ft3) / Unit Electrical Energy per day (kWh)    An energy star rating is an authorized symbol approved by the Government that displays the refrigerator's energy-saving efficiency. The energy star label is mainly used to reduce the emission of different pollutants like greenhouse gas from the refrigerator and save the envir

  A coil is an essential part of an air conditioner . Thus, it is important to understand how the coil works. Mostly copper and aluminium coils do the same job in a split AC. However, there are few differences that are noteworthy. The difference lies in heat transmission, durability, and resistance to corrosion (rusting on iron and alloys).        Let's discuss a few criterias on which we will further explain the difference along with some pros & cons of copper coil and aluminium coil.        Corrosion    While corrosion happens in both copper and aluminium coils , the damage causes refrigerant gas leaks that make it thick and muddy, hence making it necessary to protect it. In respect to copper coils, the corrosion is often limited to when oxygen interacts with organic acids and water, hence not very toxic. Corrosion in an aluminium coil is harder to repair since it is caused when two metals collide and form rust like substance.        So, what’s the difference?