HEPA H13 CBRN Air Filtration Installation in Montana

Common Challenges

• Contaminated air getting inside through cracks and ventilation

  Bunkers without positive pressure allow chemical vapors, biological agents, and radioactive particles to infiltrate through door seals, ventilation ducts, and foundation cracks during contamination events.

• Filters clog too fast without pre-filtration stages

  Single-stage filtration systems overload quickly with dust and debris, reducing airflow and forcing expensive HEPA filter replacements mid-event when supply chains are disrupted.

• No positive pressure means contaminants seep in

  Without overpressure blowers maintaining higher internal pressure, contaminated outside air flows into the bunker through any gap or crack, defeating filtration efforts.

How We Help

• 99.97% particle capture with HEPA H13 filter banks

  H13-rated HEPA filters remove 99.97% of particles down to 0.3 microns, including radioactive dust, biological spores, and smoke particulates from wildfires or explosions.

• Activated carbon filters remove chemical vapors and gases

  Multi-pound carbon filter banks adsorb nerve agents, industrial chemicals, and toxic gases that HEPA filters cannot capture, providing full-spectrum air protection.

• Overpressure blowers maintain positive pressure to block infiltration

  Variable-speed blowers maintain 0.1-0.3 inches water column positive pressure, preventing contaminated air from entering through cracks while allowing filtered air circulation.

• Pre-filtration stages extend HEPA filter life by months

  Coarse and fine pre-filters capture dust and debris before air reaches HEPA banks, reducing clogging and extending expensive HEPA filter replacement intervals from weeks to months.

• Filter change protocols allow safe replacement during events

  Isolation valves and bag-out procedures let you replace saturated filters without exposing shelter occupants to contaminated air, maintaining protection throughout extended events.

• Airflow and pressure testing verifies system performance

  Manometer pressure readings and airflow measurements confirm overpressure levels and filter efficiency before handoff, ensuring the system works when you need it.

• 99.97% particle capture with HEPA H13 filter banks

  H13-rated HEPA filters remove 99.97% of particles down to 0.3 microns, including radioactive dust, biological spores, and smoke particulates from wildfires or explosions.

• Activated carbon filters remove chemical vapors and gases

  Multi-pound carbon filter banks adsorb nerve agents, industrial chemicals, and toxic gases that HEPA filters cannot capture, providing full-spectrum air protection.

• Overpressure blowers maintain positive pressure to block infiltration

  Variable-speed blowers maintain 0.1-0.3 inches water column positive pressure, preventing contaminated air from entering through cracks while allowing filtered air circulation.

• Pre-filtration stages extend HEPA filter life by months

  Coarse and fine pre-filters capture dust and debris before air reaches HEPA banks, reducing clogging and extending expensive HEPA filter replacement intervals from weeks to months.

• Filter change protocols allow safe replacement during events

  Isolation valves and bag-out procedures let you replace saturated filters without exposing shelter occupants to contaminated air, maintaining protection throughout extended events.

• Airflow and pressure testing verifies system performance

  Manometer pressure readings and airflow measurements confirm overpressure levels and filter efficiency before handoff, ensuring the system works when you need it.