1. The air filter in the indoor unit of the air conditioner is generally valid for 6 months under normal use conditions.
2. If the air conditioner is not used frequently and the environment is good and the air is clean, as long as the surface of the air filter does not have serious discoloration (taupe), you can take out the air filter and expose it to the sun for 2 hours to remove the surface. After the dust is cleaned with a brush (cannot be washed with water), it can be reused.
