What is ISO 23875?

ISO 23875:2021 deals with the design, installation and operation of air conditioning systems used to control the concentrations of particulates and carbon dioxide in operator cabins in the mining industry. ISO 23875 addresses issues relating to cabin pressurisation, monitoring and warning systems, ventilation flow rate, removal of fresh air from the cabin, contaminated air treatment systems, recirculation rates and live monitoring of ambient conditions within the cabin.

ISO 23875 standardises cabin protection systems for use in mining operations.

What are the benefits of implementing ISO 23875?

By implementing ISO 23875, companies can work to meet exposure reduction goals and protect operator air quality.

  1. Higher filter efficiency requirements provide a cleaner working environment
  2. Defined maximum CO2 level ensures high cabin air quality
  3. Recirculation and fresh air system requirements enabling complete replacement of cabin air in seconds
  4. Established cabin pressurisation levels at > 20Pa higher than atmospheric pressure
  5. Real-time operator cabin monitoring
  6. Reduced exposure to respirable particulate through HEPA filtration
  7. Improved operator safety, comfort, and moral – supporting exposure reduction goals, health and safety efforts, and recruitment/retention
  8. Improved machine uptime and lower operating costs through meeting defined maintenance intervals

Freudenberg S.A.F.E.air Cabin Protection Systems

Certified ISO 23875 Compliant

Freudenberg Filter Technology have developed a range of products that provide consistency in cabin air performance, reducing exposures to airborne particulates for plant and equipment operators and exceed the requirements of the ISO 23875 technical standard. S.A.F.E.air has been developed to be the safest pressurisation and filtration system in the world.

Standing for "Security Against Fine Elements", Freudenberg S.A.F.E.air Cabin Protection Systems provide your workforce with a cleaner, cooler working environment.

Freudenberg S.A.F.E.air products are certified ISO 23875 compliant

Learn more about our S.A.F.E.air Filtration Systems

Find out more about our ISO 23875 compliant S.A.F.E.air product range.


Enclosed Operator Cabin Filtration

S.A.F.E.air Cabin Pressurisation

The world's leading filtration and pressurisation system. Freudenberg Filtration Technologies Innovation delivers a SAFER mine site with medical quality filtration.
Room Pressurisation keeps out dust

S.A.F.E.air Room Pressurisation and filtration

The world's leading filtration and pressurisation system for equipment and operation rooms. Freudenberg Filtration Technologies Innovation delivers a site with fresh medical quality filtration.
Freudenberg S.A.F.E.air Cabinet

The most advanced Cabinet pressurisation filtration

Protect you production critical electronic equipment in the harshest of working conditions. Reducing unplanned downtime and high cost breakdowns by using S.A.F.E.air Cabinet filtration

ISO 23875 Air quality performance testing key criteria

Freudenberg S.A.F.E.air Cabin Protection Systems are engineered to exceed the ISO 23875 standard to provide clean air for operators. S.A.F.E.air Cabin Protection Systems have been tested compliant against a range of key criteria. Listed below are the features of the Freudenberg S.A.F.E.air solution that address the ISO 23875 standard:

In-Cabin Carbon Dioxide (CO2) levels

  • S.A.F.E.air provides continuous fresh air
  • Exhaust systems for fresh air exchange
  • CO2 is maintained at ambient levels and continuously monitored (in-
    vehicle and remote via telemetry)
  • Constant level monitoring of CO2 and other particulate levels

Respirable particulate matter removal

  • High flow fan technology
  • S.A.F.E.air provides full cabin air exchange through HEPA rated filters within 20 seconds
  • Freudenberg HEPA filters are rated to ISO 29463 en 1822 standards
  • Eliminates respirable particulate matter and much finer dusts like diesel nanoparticles

Positive cabin pressure

  • Integrated electronic flow control
  • Allows positive pressure up to 200 Pa with fresh air exchange (standard required cabin pressure >20 Pa higher than atmospheric pressure)

Air flow directions

  • Laminar downflow through vehicle meeting requirement that airflow be directed away from the operator
  • Airflow is directed in to breathing zone and out furthest / lowest point of cabin

Dual filtration circuits

  • HEPA level filtration on both fresh air and recirculation air filter circuits
  • Australian Institute of Occupational Hygienists ISO 29463 EN 1822 Standard HEPA filters provide hospital and cleanroom grade air

Maintenance/filter pre-cleaners

  • S.A.F.E.air includes cyclonic pre-cleaners and coarse dust filters to prolong HEPA filter life
  • System is designed to fit standard maintenance schedules (1K-2K hours)
  • Total A/C system protection through HEPA recirculation filtration
  • Eliminates fan & condenser maintenance due to dust ingress

System Leakage

  • Careful attention is given to low pressure areas of the air conditioning circuit, with S.A.F.E.air providing full system cabin and A/C circuit pressurisation
  • S.A.F.E.air system keeps positive pressure in the cabin, preventing any vacuum areas where dust may be sucked into the cabin
S.A.F.E.air Cabin Pressurisation systems enable vehicles to be retrofitted for ISO 23875 compliance.

Benefit from our World Wide specialised expertise in the Mining industry

Download these files for more information on our ISO 23875 compliant S.A.F.E.air products


S.A.F.E.air Nano particle & CO2 filtration

S.A.F.E.air Nano particle & CO2 filtration


S.A.F.E.air Pressurised Cabin Air Conditioning and Filtration Unit

The world’s leading filtration and pressurisation system

Standards and Certifications

Delivering Clean Air above the industry Standard

ISO 23875 Air quality performance testing key criteria


Nanoparticles test report

Want to know more about S.A.F.E.air or have a question?

Contact us for an obligation free site/fleet review on how
S.A.F.E.air Air Filtration and Pressurisation systems
can improve your operations