Keep your Blueair 402 HEPASilent Air Purification Unit at its optimal performance level with the Blueair 402 HEPASilent Air Purification Unit Smokestop Replacement Filter. (This 402 has only one filter that requires replacement).

• One (1) Complete Filter Change of one (1) Smoke Stop HEPASilent filter
• Polypropylene (equal particle efficiency)
• More activated carbon for better smoke and gas removal

Click Here to view the standard 402 Replacement Filter.

One complete filter change: 1 standard HEPASilent (TM) filters of polypropylene (equal particle efficiency) with more activated carbon for better smoke and gas removal.

The enhanced SmokeStop (TM) filter is a new progressive carbon filter with a honeycomb-type structure that improves the airflow and has hundreds of odor absorbing carbon pellets.

Like all our filters, the new carbon filter is progressive in structure in that it has three layers: a chipboard frame and outer layer, a pleat element and a carbon element. The new SmokeStop (TM) is designed to treat cigarette smoke, acid gases and ammonia.

The new filter uses a high content of granular carbon for increased efficiency. The new carbon blend of the filter is designed to capture more compounds and gases to lower the pressure point which means higher airflow through the filter in terms of cubic feet per minute than our previous SmokeStop (TM) filter.

Since the honeycomb design does not require a thick binding agent throughout, all the absorption pores are open for added filtration capacity. The higher activation level of the carbon pellets increases efficiency of the filter.