Choosing the right air filter can seem like a complicated process, but it doesn't have to be. It's all about knowing what type of filter you need and how often you should change it. This guide will cover everything from what types of filters are available to how often they... Choosing the right air filter can seem like a complicated process, but it doesn't have to be. It's all about knowing what type of filter you need and how often you should change it. This guide will cover everything from what types of filters are available to how often they...