Breeze Purifier P4

HEPA 13 and activated carbon in a single cylindrical cartridge, moving enough air for a 60 square metre room five times an hour. It normally sits at 24 decibels, which is quieter than a fridge, and only spins up when the built-in particle sensor or an outdoor pollen forecast tells it to. The filter is a twelve-month item and the machine says so honestly, counting hours rather than days.