Quality Cabin Air to ISO 23875 Standards

LSM QCABAIR® (pat.pend) Cabin Pressurisation / Filtration Commixing Plenum

LSM QCabAir® (pat.pend) Cabin Pressurisation / Filtration Commixing Plenum integrates the External Air Pressuriser & Recirculation Filtration Units to create a compact system that ensures your Cabin Environment is compliant to Australian and International (ISO 23875) exposure OH&S Standards.

LSM QCABAIR® (pat.pend) Cabin Pressurisation / Filtration Commixing Plenum
Design & EngineeredDESIGN & ENGINEERED

In a day and age where smoking (particulate >0.5µ) is barred from work and public places, there still seems to be a lack of understanding about the extent and ramifications of Workplace Exposure to Airborne Particulate and Fibre of harmful / carcinogenic “dusts” that causes workplace occupational respiratory disease.

Experts say exposure to diesel fumes is Australia’s second most prevalent work-based cancer-causing agent and warn those who work with diesel-powered engines, vehicles and machinery to be aware of the associated risks of lung cancer.

LSM QCabAir® (pat.pend) Cabin Pressuriser / Filtration Commixing Plenum is a connection system that combines any External and Recirculation Air Filtration Units into a single compact mounting system that ensures compliance to OH&S Workplace Exposure to Airborne Particulate and Fibre compliance.

LSM QCabAir® (pat.pend) not only ensures / surpasses compliance, but provides for enhanced Operator comfort, reduced HVAC failure and a healthier / productive workforce.

Australian designed and made Technology

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OH&S Compliance

RCS (Respirable Crystalline Silica) is found at varying levels in all dusts, especially within the Mining, Quarrying, Construction, Agriculture, Cement, Crushing and Earthmoving Industries. However, compliance is not just about exposure to RCS but also providing protection against other harmful types of contamination "nasties" such as asbestos, nickel, alumina, coal, iron ore, pesticides, herbicides, etc. DPM (Diesel Particulate Matter) exposure is also a major concern and according to the ACS (American Cancer Society) and SafeWork Australia and is a Class1 Carcinogen

A major misconception is Enclosed Cabins on Fixed and Mobile Plant protect the Operator / Occupants against these harmful substances. In fact, concentration of contamination can be worse within the Cabin and can even far exceed the outside air quality.

Australian and International Standards (eg ISO 23875) require that all Enclosed Cabins must be equipped with Cabin Pressuriser / Filtration Systems and that they are configured to comply with:

  • External Air Filtration: HEPA >H13 / H35 filtration class according to EN1822 / ISO 29463.
  • External Air Filtration unit must provide fresh air to the HVAC Evaporator Plenum and must not be connected to the Cabin so as ambient air temperature is directly applied to occupants.
  • Recirculation Air Filtration: HEPA >H13 / H35 filtration class according to EN1822 / ISO 29463. Recirculation Unit must conform to particulate inside the Cabin of <0.025 μg/ m3 at start / end of decay test, maximum of 120 seconds decay time.
  • Exposure Levels: Cabin is to be periodically tested to ensure that occupant exposure levels are maintained at <0.05mg / m3 TWA for an 8-hour shift and 0.025 mg / m3 for a 12-hour shift (eg to Brief and Scala calculation). Definition of  HEPA to Australian Standards (refer AS 4260- 1997) is to provide an arrestance of particulate size >0.3 micron at 99.97% efficiency.
  • Co2 Concentration: Maintain safe levels of Co2  below 700ppm (AIRHA) - excessive Co2 causes premature fatigue, lack of concentration, microsleeps, etc.
  • Cabin Pressurisation:  Cabin pressurisation >20-50 pascal with the HVAC turned off and must not exceed 200 pascals.
  • In- Cabin monitoring / Warning Device:  So a Cabin Pressurisation and Co2 levels are monitored with alerts / warnings of exceedance.
  • Life Cycle Testing / Compliance Checks: Conduct routine performance testing of air quality control system throughout the lifecycle of the Cabin to maintain compliance. Testing cab pressure, CO2 concentration & External  + Recirculation filtration effectiveness at machine service intervals.
OH&S Standards + Guidelines

LSM QCabAir® (pat.pend) Cabin Pressuriser / Filtration Commixing Plenum combines and mixes the filtered External and Recirculation Air Filtration Units into a single compact mounting system.

A clean Cabin and a more comfortable / healthier / safer working environment means- happier Operators, enhanced concentration / alertness and productivity.  

LSM QCabAir® (pat.pend) provides for optimising the entire Cabin Environmental Conditions with specific benefits as:

  • Compliance: Exceeds Australian (eg QLD Recognised Standard RS20 + RS15) and International ISO 23875 compliance. 
  • Co2 Concentration / Ventilation: Ensures adequate and constant exhaust air flow / ventilation (especially for multiple occupants). Fresh air flow required to off - set Co2- AIRAH 10-15 l / seconds (20-30 CFM) / occupant.
  • Cabin Pressurisation: Optimum Cabin pressurisation to 50-150 pascal and will not over- pressurise cabin.
  • Filter Element Service Life: Uses Extended Length Filter Elements to provide less frequent filter exchange - again, maximising Filter service life. 
  • Recirculation Air Filtration: Highest Recirculation Air Filtration with >120 CFM (3.4 m3/ min) of entrapped contamination. Considering an average Cabin volume, the Recirculation filtration will cycle the Cabin 1 x 60 seconds.
  • Thermal Comfort: As the Core Plenum mixes the External Air (ambient temperature) and Recirculation Air (pre-cooled)  then optimum comfort is provided for the Cabin.
  • HVAC Service Life: Clean Air in the Cabin also means extended service life of the HVAC Evaporator. Also, Mixing of the External and Recirculation Air provides balanced dynamic loading of the HVAC. 
  • Balances External / Recirculation Air: Mixes both air sources to optimise HVAC dynamics. 
  • Rapid Filtration of Recirculation Air: Entrapped Contamination enters via Operator’s clothing / boots, opening of doors / windows, etc.
  • In Cabin Monitor: Provides Monitoring of Co2 & Cabin Pressurisation. 
  • Filter Elements: Specifically designed Filter Elements for Gas, Asbestos, RCS, DPM (diesel particle) and Odour Filtration.
  • Telemetry Data: Data also sent back via LSM FSM® Fleet Safety & TrackingTelemetry System for recording, alerting, reporting, validation of performance / compliance.
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A few of the specific benefits / advantages of our LSM QCabAir® (pat.pend) Cabin Pressuriser / Filtration Commixing Plenum are:

  • Housing Design: The Core Mixing Plenum Commixing Plenum is made from 304 stainless steel and powder coated, reducing heat absorption in high ambient conditions and the Core Module will never rust or deteriorate.
  • All Cabins: The QCABAIR® (pat.pend) Core Mixing Plenum can be easily mounted and used for both Fixed and Mobile Plant Cabins. 
  • DOP Tested and Certified: Can be DOP Tested / Certificated to EN 1822 / ISO 29463 prior to being installed.
  • Installation / Commissioning: As a single core assembly with External and Recirculation Air units using a single ducting into and out off the Cabin. The LSM QCabAir® is already pre- commissioned (DOP Tested) before leaving our workshop- installation and commissioning is quick and easy.
  • Ease of Mounting:  Comes as a completed assembly as single Core Module - saves time for installation or can be easily provided as DYI kit.
  • Single Ducting: Single Ducting connection into and from the Cabin to the LSM QCabAir® (pat.pend) Commixing Plenum.
  • Standardisation for any Application: As all the working components are contained on the QCabAir® (pat.pend) Cabin Pressuriser / Filtration Core Commixing Plenum, then it can be easily adapted and mounted to virtually any machine
  • Small and Low Weight Foot-print: The Core Module is light (under 25 kg) and has a small foot- print.
  • Fully Transferable: Can be transferred easily from one vehicle to the other.
  • Warranty: 3 years.
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QCABAIR® Designed for your Cabin

Let our LSM Technologies Engineering Team complete a full as- built design for your Fixed or Mobile Cabin.

Our design engineers will provide you a simple LSM QCabAir® (pat.pend.) Cabin Pressuriser / Filtration System specifically to suite your Make / Model of machine or Fixed Cabin.

Simply they will use our "Leo" (3D Scanner) to create a model of the inside and outside the Cabin and, with a  bit of mensuration provide you with:

  • Test and ensure compatibility for your chosen Filtration / Pressuriser Units
  • Design a fit - for - purpose system configuration that exceeds Australian and International WHS compliance Standards and Guidelines for Workplace Exposure to Airborne Particle / Fibre.
  • A system configuration that will be easy to service and low in maintenance and with all the above features and benefits.
  • Consider OH&S for maintenance, filter element exchange, ease of access to your specifications.
  • A complete onsite audit and the design drawing, include mensuration, is at no charge for local Brisbane.
  • After the machine audit, we will produce an as- built detailed Drawing with full BOM
  • We can then either install / commission, or the as- built design drawing is so detailed that you can even DYI.

See some examples of our LSM QCabAir® (pat.pend) Cabin Pressuriser / Filtration Commixing Plenum Systems.

FSM® Telematics Integration

LSM QCabAir® (pat. pend.) works hand in hand with LSM FSM® Fleet Safety Manager + Tracking Telematics System to provide real time data and alerts back to base, ensuring a proactive approach to enhance Workplace (and public) OH&S, Equipment Damage Control, Maintenance Cost-downs and Productivity

LSM FSM® is an in- house world first and Australian designed / developed SaaS software that allows users to be provided with more than just fleet tracking but also integration of LSM product technologies, that can be accessed via any internet connected PC or mobile device. 

LSM FSM® is an intuitive web browser interface with a single click access to fleet dashboards, customise reports, compliance tools as well as real time, user defined alerts. It is scalable from a single vehicle / asset up to thousands, providing immediate alerts as required via SMS and email, anywhere in the world- 24/7.

Australian designed and made- for Australian Industry.   

Want to know more about FSM Fleet Safety Manager®
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Phone+61 7 3725 8100

Did You Know?

Lung Cancer Workplace Statistics

More than 7 million Australians are currently living with lung conditions. Chronic lower respiratory diseases are the fifth leading cause of death in Australia. Around 2.7 million Australians – 11 per cent of the population – have asthma.

Launched in February 2019, the National Strategic Action Plan for Lung Conditions is a nationally co-ordinated effort to address the lung health of Australians. It identifies priority actions to help speed up diagnosis and improve treatment of lung cancer, asthma, COPD, occupational lung diseases and rare lung diseases, including cystic fibrosis.


  • Importance of Cabin Pressurisation / External Air Filtration
  • The test cabin depicts how the system pressurisers & excludes external particulate entering the Cabin at >HEPA filtration levels

  • How Co2 concentration occurs in the Cabin
  • Co2 Sensors inside (and outside) the Test Cabin graphically depict the dangerous Co2 Concentration that occurs inside the Cabin through natural respiration of a single occupant who is in a passive state (not driving / no high ambient temperatures / not speaking on the radio, etc). Co2 cause reduction in concentration and microsleeps

  • Importance of Recirculation Air Filtration
  • Using Particulate Monitors we measure the mass concentration of Particulate inside the Cabin with only a single occupant and how quickly the Recirculation Filtration unit removes the airborne particulate- even from the Operator's skin / clothing

  • Recirculation Filtration- extreme Test for rapid removal of Particulate
  • This an extreme test indeed where we initiate inside the Test Cabin a 18 m3 Smoke Emitter with a Particulate size of >0.3  micron. See how quickly the Recirculation Filtration unit brings the exposure levels to compliance.