Our Carbon Modules have a finite life with the amount of time before odours break through. The amount of time before break through depends on the concentration of the odour which is removed.
Should you start to smell odours breaking through the Carbon Module, that is a sign that the activated carbon in becoming saturated and requires replacement.
Our Carbon Refill supplies you with the amount of carbon required to recharge a Carbon Module. Simply prise off cover from the module, tip out the old carbon into the bin, and refill with new fresh carbon.