High powered, robust, and fitted with an advanced failsafe system to ensure continued operation in the event of mains failure, the CastellexAir 3100 NBC system provides up to 300 m3/h of fresh air to a maximum of 30 people in an enclosed environment. This is a positive pressure air filtration system, which repels contaminated air by elevating the local air pressure until it is greater than the pressure of the air outside. Incoming air—required to replenish the oxygen in your panic room, nuclear bunker, or bomb shelter—is cleaned by the pre filter and a top-rated HEPA filter (not included), ensuring a safe environment in the event of nuclear, biological, and chemical (NBC) attacks. This fallout shelter air filter operates with 99.99% efficiency for particles down to 0.3 microns (micrometres). Power-rated at 150 W when using the supplied 110/240 V AC power cord or backup supply, the system operates at a conservative 61dBA noise level (just over the average sound level of normal conversation) at 50 Hz. Perfect as a base-level bunker ventilation system for heavy-duty protection, the Castellex Air3100 life support system (LSS) can also be customized with a number of add-ons. Add blast valves to augment the system’s existing blast-protection capability (the Castellex Air 3100 is supplied with a blast valve able to manage air-pressure fluctuations up to 129psi). Install with an automatic power generator for extra failsafe capabilities. Fit carbon and HEPA filters for complete protection against all known warfare gases plus biological agents, radioactive pollutants including radioactive iodine, volatile organic compounds, and more. Other available accessories include O2 indicators, pressure indicators, HVAC units. Install your Castellex Air 3100 underground bunker ventilation system in high-risk domestic locations, military applications such as gunboat citadels, and civic or commercial buildings—such as embassies—at extreme risk of compromise or attack. With a 3000 series filter pack fitted (pre filter, carbon filter, and HEPA filter) in the unit, your premises or mobile asset will be superbly protected in the event of a terrorist attack, wartime event, or natural disaster. Not sure which heavy-duty bomb shelter ventilation system is right for your requirements? Our discreet and efficient staff will be happy to advise you on the NBC air filter that best suits your needs. We can also help you to design a comprehensive fallout shelter air filtration system incorporating add-ons and accessories. The system is warrantied for one year, and we offer a comprehensive aftercare service for an additional price. Available in white*. The Castellex Air 3100 NBC system is built in the UK using the highest quality components, and features a modern, attractive design.


Collective filtration system intended for up to 30 * people in panic room The system provide 300 m3/h of fresh air High blast protection (129 PSI) Operated by electric power Power backup system for operating without mains “Castellex Air 3100 protect you from all known warfare gases and also Biological weapons/ contamination, Radioactive contamination, Radioactive Iodine and Iodine Organic Compounds, Acidic gases, Volatile Organic Compounds (VOC’s) and more”
Air flow up to 300 m3/h
Power consumption 150W
Power supply 240 VAC
Frequency 50 Hz
Hepa filter H14
Pre-filter F9
System efficiency 99.99%
Noise level dB A 61
Color design white


Castellex Air 3100 unit Pre-filter NBC pipe 10m Power unit Power cord

Castellex Air 3100

High-powered NBC air filtration unit with pre filter.

Designed for use in high riskcommercialand military applications, the Castellex Air 3100 life support system is built to work with the highest H14 rating of HEPA filter (not included). This system is fitted with a pre filter and supplied with NBC pipe.


£12,630.00 + VAT

Additional products

  • Automatic power generator

    £12,900.00 + VAT
  • Filter pack 3000 series (pre filter, hepa and carbon filters)

    £12,390.00 + VAT
Castellex Logo Just White
Castellex has vast experience in designing and manufacturing NBC (Nuclear Biological Chemical) Air Filtration/ Air supply stations for different applications. It’s widely used across the Globe by military, hospitals, private individuals. No nuclear bunker or survival shelter is completed without the state of the art Castellex NBC air filtration station.
Google Rating
Follow us
We accept
Worldpay payment system
Created by
© Castellex 2015 - 2023