Castellex Air 350

The Castellex Air 350 is a three-stage NBC air filtration system with pre-installed filters. It is built for nuclear shelters, panic rooms and bomb shelters, as well as private and commercial premises in areas of higher pollution or threat.

The system carries a top-rated H14 class HEPA filter, an F9 class pre-filter and a carbon filter that removes most known warfare gases.

It maintains positive pressure in the room, so unfiltered air cannot enter through cracks and gaps. Triple backup power means the system runs even when the mains fail and the battery is flat — at that point the manual backup drive takes over. A USB charger is fitted for communication devices.

The air intake is protected by a blast valve, which controls room pressure in the event of an explosion, a building collapse or a shock wave. Made in the United Kingdom, available in white or black.