How often should I replace my air filter?

The frequency you should change your air filter depends heavily on this one factor: the weather. When it’s scorching hot in the summer you’re running your air conditioner constantly. That means more air is flowing through the filter and it’s catching more dust, dirt and debris. Therefore, you’ll need to change the air filter more often, ideally once a month.

In winter when you rarely run your A/C you should change your filter once every 3 months.