Air conditioners have become an important part of our day-to-day living. In the summer season, many cannot live without them. You can see air conditioners in virtually every place, from your bedroom to school, colleges, offices and shopping centres.

Purchasing a new air conditioner is a long-term investment, so there are a few things, which you should keep in mind while purchasing an air conditioner. It should be energy efficient. In other words, it should save energy and should not be heavy on the pocket.

There are many types of air conditioners available in the market, such as:

•    Central air conditioner
•    Window air conditioner
•    Split air conditioner
•    Portable conditioner
•    High velocity air conditioner

The energy levels of a central air conditioner are measured in units, SEER. Higher the SEER the better the air conditioner unit is.  If you want to save 30% cooling cost, you should select an air conditioner, which has 12.0 SEER. Installing a thermostat in the air conditioner also reduces the energy consumption.