Briiv will purify the air in a 6m x 6m room in one hour and seeing the easy use and the compact size. I will probably use it in different rooms in the next days to find out what I love most and what works best in my home. The moss and coconut filters are made to last up to twelve months, and the nano matrix filter will last up to three months. A One year filter pack will have four nano matrix filters included to swap these out after three months.