HEPA H13 CBRN Air Filtration Installation in Helena

Common Challenges

• Contaminated air seeps through cracks without positive pressure

  Bunkers without overpressure systems allow airborne contaminants to infiltrate through foundation cracks, door seals, and ventilation gaps during CBRN events.

• DIY filters fail to capture chemical vapors and fine particles

  Hardware store filters lack HEPA H13 ratings and activated carbon banks, letting nerve agents and radioactive particles pass through into living spaces.

• Filter changes during events risk contamination exposure

  Replacing clogged filters without proper protocols exposes occupants to contaminated air when the system is offline or seals are broken.

How We Help

• HEPA H13 filters capture 99.97% of 0.3-micron particles

  Filter banks with HEPA H13 media remove radioactive dust, biological spores, and fine particulates down to 0.3 microns, meeting NBC protection standards.

• Activated carbon banks remove chemical vapors and gases

  Multi-stage carbon filtration adsorbs nerve agents, industrial chemicals, and toxic gases that HEPA filters alone cannot capture.

• Overpressure blowers maintain positive pressure to block infiltration

  Variable-speed blowers keep bunker pressure 0.1-0.3 inches water column above outside air, preventing contaminated air from seeping through cracks or seals.

• Filter change airlocks allow safe replacement during events

  Sealed filter housings with glove ports let you swap filters without breaking positive pressure or exposing occupants to contaminated air.

• Airflow and pressure testing verifies system performance

  Pre-handoff testing confirms CFM delivery, pressure differential, and filter seal integrity so you know the system works when needed.

• HEPA H13 filters capture 99.97% of 0.3-micron particles

  Filter banks with HEPA H13 media remove radioactive dust, biological spores, and fine particulates down to 0.3 microns, meeting NBC protection standards.

• Activated carbon banks remove chemical vapors and gases

  Multi-stage carbon filtration adsorbs nerve agents, industrial chemicals, and toxic gases that HEPA filters alone cannot capture.

• Overpressure blowers maintain positive pressure to block infiltration

  Variable-speed blowers keep bunker pressure 0.1-0.3 inches water column above outside air, preventing contaminated air from seeping through cracks or seals.

• Filter change airlocks allow safe replacement during events

  Sealed filter housings with glove ports let you swap filters without breaking positive pressure or exposing occupants to contaminated air.

• Airflow and pressure testing verifies system performance

  Pre-handoff testing confirms CFM delivery, pressure differential, and filter seal integrity so you know the system works when needed.