“Changing the filters is really easy, we just change before we switch everything on, all of our staff follow your recommended filter change schedule on the wall so no disruptions to our preparation time as we are super busy.  The frames are clean when we change the filter, and we just throw the used wool filters in the bin so yes its very simple system.  I’ve actually notice that our ducts are cleaner and that’s because we can see how much grease is there on the wool filters, so yes we can see how much grease is stopped from entering the ducting.”