1. When purchasing an air conditioner, you must know how big your room is and how much space it is used for, so that you can easily choose the size of the air conditioner.

2. If it is used in the bedroom, choose a hanging type, which can save space. If the living room is large, you can choose a cabinet air conditioner.

3. Choose a brand. You can make the final decision based on your own preferences and economic level. It is best to choose a well-known big brand, which is safer and more reliable.

4. Look at the energy efficiency ratio of the air conditioner. It is usually posted on the surface of the machine. The higher the energy efficiency, the better the performance, and the more energy-saving and energy-saving, of course, the higher the price.