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SYSTEM DIAGRAMCURRENT · v1.0.0DIAG-CABIN-AIR-SYSTEM

Cabin Air Filtration System — ISO 11155

Documents the filtration stages in a compliant cabin air system under ISO 11155. Operators in construction, agriculture, and mining environments may be exposed to PM10 and PM2.5 concentrations that exceed occupational exposure limits without an effective cabin filtration system. Each stage addresses a distinct contaminant class: coarse particles, gas-phase contaminants, and fine respirable particles.

Cabin Air Filtration System — ISO 11155ISO 11155 cabin air filtration system flow diagram. Outside air enters fresh air inlet, passes through coarse particulate pre-filter (PM10 stage), activated carbon adsorber (gas-phase contaminants and odours), fine particulate filter (PM2.5/HEPA, greater than 95% efficiency at 0.3 µm per ISO 29463), then delivers to cabin HVAC zone. A recirculation mode damper returns cabin air back through the carbon and fine filter stages when external contamination levels are high.CABIN AIR FILTRATION SYSTEM — ISO 11155FRESH AIR MODE (primary) ──────────────────────────────────────────────────OUTSIDEAIRINLETSTAGE 1PRE-FILTER (PM10)ISO 11155STAGE 2ACTIVATED CARBONVOCs · odoursNH₃SO₂VOCH₂SSTAGE 3FINE / HEPA FILTERISO 29463 · >95% @ 0.3 µmPM2.5 · 0.3 µm particles capturedCABINHVAC ZONEoperator breathing zone─────────────────── RECIRCULATION MODE (high external contamination) ───────────────────DAMPERCabin return air recirculates through carbon + fine filter stages when external PM or gas exceeds thresholdPRE-FILTERPM10 removalACTIVATED CARBON>90% VOC removalFINE / HEPA>95% @ 0.3 µmSYSTEMISO 11155 compliantISO 11155 · ISO 29463 · DIN 71220
Left-to-right system flow. Outside air inlet on the left. First stage: coarse particulate pre-filter labelled PM10 stage per ISO 11155, showing large particle symbols blocked. Second stage: activated carbon adsorber for gas-phase contaminants and odours, shown as a dotted-pattern block. Third stage: fine particulate filter labelled PM2.5/HEPA achieving greater than 95% efficiency at 0.3 µm per ISO 29463, shown with dense hatch and very small particles blocked. Arrow continues to cabin HVAC zone on the right. A recirculation branch shown as a dashed arrow below the main flow returns cabin air to the carbon and fine filter stages, controlled by a damper. Labels indicate fresh air mode on main path and recirculation mode on branch.

GOVERNING STANDARDS

ISO 11155 1
ISO 29463
DIN 71220

ELIMFILTERS TECHNOLOGIES

MICROKAPPA™

APPLICABLE SYSTEMS

Cabin Air Protection

REVISION METADATA

Versionv1.0.0
Statuscurrent
Last Reviewed2026-07-08
Next Review2027-07-08

RELATED ENGINEERING ARTICLES

→Cabin Air Filtration
→Filter Element Integrity
→Seal Integrity

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