Ambifresh filters are a new technology in residential extractor hood charcoal filters. The designers stratified the filter to produce new ways of removing cooking odors so you can enjoy cooking without being bothered by fumes. The four different models are interchangeable, so you can choose which best suits your style of cooking. Charcoal filters were developed to achieve a balance between higher efficiency, longer life, lower noise, higher air flow, and greater airflow uniformity, ensuring better overall performance.