No, not all air filters are the same. There are many different types of air filters that are designed to filter out different types of particles from the air. Some air filters are designed to filter out large particles, such as dust and pet dander, while others are designed to filter out smaller particles, such as mold spores and allergens. There are also air filters that are designed to filter out specific types of pollutants, such as smoke or chemicals. The type of air filter that you need will depend on the specific contaminants that you are trying to remove from the air in your home.