Published: March 2026 | By Anitech Occupational Hygiene Team
Part of our Mask Fit Testing Australia: Complete Guide
Walk into any hardware store, pharmacy, or safety equipment supplier in Australia and you’ll see P2, N95, FFP2, and P3 respirators on the shelf. If you’re a safety manager, occupational hygienist, or worker responsible for specifying respiratory protection, you’ve probably wondered: what’s the difference? Why does one cost more than another? Can I use an N95 if the standard calls for a P2? Are they all the same, or do they protect differently? These questions matter because the choice of filter class directly affects the level of protection your workers receive, and it also determines what fit testing approach is required. Understanding these classifications is essential for compliance with Australian standards and for ensuring your workforce is genuinely protected.
The Australian/New Zealand Classification System: AS/NZS 1716:2012
Australia and New Zealand have their own respiratory protective equipment standard: AS/NZS 1716:2012. This standard defines three filter classes for particulate respirators: P1, P2, and P3. These are the classifications you should be working with if you’re managing respiratory protection in Australia.
P1: The Entry-Level Class
Filter efficiency: ≥80%
Hazard level: Low-hazard particulates, non-toxic dusts, nuisance dusts
Assigned Protection Factor (APF): 4
Fit testing required? For non-toxic nuisance particulates, fit testing is not typically required. However, if a P1 respirator is used as RPE (respiratory protective equipment) under AS/NZS 1715:2009, fit testing becomes mandatory.
P1 respirators are appropriate for protection against dusts that are non-toxic and non-fibrogenic — dusts that don’t cause lung disease through chronic exposure. Examples include general dust from sawing, grinding of non-hazardous materials, and general workshop dust. The filter blocks at least 80% of incoming particles, and the APF of 4 means that if the outside air has 100 particles, the air inside the mask should have no more than 25. P1 is the minimum protection level for any particulate exposure in the Australian workplace, but it’s suitable only for genuinely low-hazard dusts.
P2: The Workhorse Class
Filter efficiency: ≥94%
Hazard level: Moderate-hazard particulates (silica, welding fumes, biological aerosols, synthetic mineral fibres, pesticide dusts)
Assigned Protection Factor (APF): 10
Fit testing required? Yes, always. AS/NZS 1715 requires fit testing before any use as RPE.
P2 is the most common respirator class in Australian workplaces. It blocks at least 94% of particles and has an APF of 10, meaning it reduces the inside air concentration to at least 1/10th of the outside concentration. This level of protection is appropriate for:
- Crystalline silica dust (in construction, stonemasonry, grinding)
- Welding fumes and metal fumes
- Biological aerosols (healthcare, aged care, emergency response)
- Wood dust and plant fibres
- Synthetic mineral fibres
- General manufacturing dusts
Since October 2024, P2 respirators are the standard choice in Australia for protection against crystalline silica, following the ban on engineered stone benchtops and the strengthened silica exposure regulations.
P3: The High-Hazard Class
Filter efficiency: ≥99.95%
Hazard level: High-hazard particulates (asbestos, radionuclides, certain carcinogens, Schedule 1A substances)
Assigned Protection Factor (APF): 50 (half-face mask), 2,000 (full-face mask)
Fit testing required? Yes, always. For P3 half-face, fit testing can be qualitative or quantitative. For P3 full-face, fit testing must be quantitative.
P3 is the highest particulate filter class and is used only for the most hazardous exposures. Asbestos remediation, radionuclide handling, and exposure to Schedule 1A carcinogens all require P3 protection. The extremely high efficiency (≥99.95%) means the filter blocks virtually all particles. The APF of 50 (half-face) or 2,000 (full-face) reflects this exceptional protection. Because the hazards protected against are so severe, standards require quantitative fit testing for P3 full-face masks — there’s no room for error. The fit factor must be measured objectively, not estimated subjectively.
The American Classification System: NIOSH
The United States has its own classification system, created by the National Institute for Occupational Safety and Health (NIOSH). You’ll see NIOSH-marked respirators on shelves in Australia, and you need to understand their status.
N95 and Related Classes
What it is: The “N” stands for “not oil resistant.” The “95” means the filter blocks at least 95% of particles (sodium chloride test aerosol).
How it compares: An N95 is broadly equivalent to a P2 in terms of filter efficiency. Both block approximately 94–95% of particles. However, N95 is an American standard and is not directly tested to AS/NZS 1716.
Status in Australia: N95 respirators have complex regulatory status in Australia. Some are approved by the TGA (Therapeutic Goods Administration) for specific healthcare uses. However, for general occupational use as RPE, a respirator should be certified to AS/NZS 1716. If you’re specifying respirators for workplace use in Australia, you should specify P2 — not N95 — to ensure compliance with Australian standards.
Why it matters for fit testing: If an N95 is approved for use in your workplace (e.g., a hospital using TGA-listed N95 masks), fit testing still applies if the mask is being used as RPE. The principles are identical: the filter matters, but the seal matters more.
R and P Variants
The American system also includes:
- R (oil resistant): Designed to resist oil aerosols for 8 hours
- P (oil proof): Designed to resist oil aerosols longer term
These variants aren’t commonly used in Australian workplaces, as Australian standards don’t typically require oil-resistant ratings. Stick with P-class respirators (P1, P2, P3) for Australian compliance.
The European Classification System: EN 149
Europe has its own standard: EN 149, which defines FFP (Filtering Facepiece) classes.
FFP1, FFP2, FFP3
- FFP1: ≥80% filter efficiency (equivalent to P1)
- FFP2: ≥94% filter efficiency (equivalent to P2 / N95)
- FFP3: ≥99% filter efficiency (equivalent to P3)
The European classes have similar efficiency levels to Australian P classes, but they’re tested to a different standard with different test aerosols and conditions.
European Marking vs. Australian Standards
Here’s the critical point: A respirator marked only with European (CE mark) or American (NIOSH) certification should not be used as RPE in Australia unless it also holds AS/NZS 1716 certification. This is a compliance requirement. You might see an FFP2 mask that performs well, but if it’s not also certified to AS/NZS 1716, it’s not legally acceptable for use as RPE in Australian workplaces. Some manufacturers produce respirators that hold dual certification (both CE and AS/NZS 1716 marking), and those are acceptable. But European or American markings alone are insufficient.
Comparison Table: Classification Systems and Key Specifications
| Filter Class | Standard | Filter Efficiency | APF (Half-Face) | Australian Compliance | Fit Testing Required? |
|---|---|---|---|---|---|
| P1 | AS/NZS 1716 | ≥80% | 4 | Yes (when used as RPE) | Yes (when used as RPE) |
| P2 | AS/NZS 1716 | ≥94% | 10 | Yes | Yes |
| P3 | AS/NZS 1716 | ≥99.95% | 50 | Yes | Yes (quantitative for full-face) |
| N95 | NIOSH (USA) | ≥95% | 10 | Limited (TGA approval only) | Yes (if used as RPE) |
| FFP2 | EN 149 (Europe) | ≥94% | 10 | No, unless dual-certified | Yes (if dual-certified) |
| FFP3 | EN 149 (Europe) | ≥99% | 50 | No, unless dual-certified | Yes (if dual-certified) |
Fit Testing Implications for Each Class
Here’s where fit testing becomes critical: The filter class determines the protection level (APF), but the fit test determines whether you actually achieve that APF.
A P2 respirator has an APF of 10, meaning it’s designed to reduce exposure by a factor of 10. But that’s only true if it fits properly. If the fit factor from your fit test is 80 (good, but not exceptional), you’ve achieved an APF of about 8 — still protective, but slightly less than the design specification. If the fit factor is 30 (poor seal), you’ve only achieved an APF of 3, which is inadequate for a P2 hazard.
This is why fit testing is non-negotiable:
- P1 respirators: Although rarely used as RPE, if they are, fit testing applies. The test confirms the seal works.
- P2 respirators: Fit testing is mandatory. A half-face P2 must achieve a fit factor of at least 100 to ensure the APF of 10 is actually delivered.
- P3 half-face: Fit testing is mandatory, and a fit factor of at least 100 is required.
- P3 full-face: Fit testing is mandatory and must be quantitative. The threshold is typically a fit factor of 500 or higher to ensure the exceptional APF of 2,000 is achieved.
Key Rule for Australian Employers
AS/NZS 1715:2009 requires that any respirator used as RPE must be certified to and marked with AS/NZS 1716. This is the legal requirement. Respirators marked only to overseas standards (CE/FFP2, NIOSH/N95) are not compliant for RPE use in Australia, except in very specific approved circumstances (e.g., TGA-approved N95 masks in healthcare settings). WorkSafe Victoria and other state regulators expect to see AS/NZS 1716-marked equipment when they audit respiratory protection programmes.
Matching Hazard to Filter Class
Here’s a practical guide to choosing the right class for your workplace:
Use P1 when: Protecting against genuinely non-toxic dusts (e.g., wood sawdust, general workshop dust) — though P2 is often specified for simplicity and universal applicability.
Use P2 when: Exposing to silica, welding fumes, biological aerosols, or other moderate-hazard particulates. This covers the vast majority of Australian construction, healthcare, and manufacturing workplaces.
Use P3 when: Exposing to asbestos, radionuclides, or Schedule 1A carcinogens. These are rare exposures, typically involving specialist contractors or research facilities.
Use P2 or higher when: You’re uncertain about the hazard level. It’s always safer to specify a higher class than necessary.
Powered Air-Purifying Respirators (PAPRs): An Alternative
If workers struggle to achieve a good fit with half-face P2 or P3 respirators, PAPRs (powered air-purifying respirators) are an alternative. These use a battery-powered fan to draw air through a filter and deliver it to a hood or mask. PAPRs offer several advantages:
- Better comfort due to lower breathing resistance
- Higher fit factors (usually APF of 25 or higher)
- Accommodation of a wider range of facial shapes and sizes (including beards, in some cases)
- Cooler wearing experience
However, PAPRs are more expensive and require maintenance, battery charging, and regular filter changes. They’re typically used when workers have repeatedly failed to fit P2 or P3 half-face respirators.
Real-World Scenario: Choosing a Respirator for Silica Exposure
A construction company has workers exposed to crystalline silica during concrete cutting and grinding. What filter class should they choose?
Answer: P2 is appropriate and required. Since October 2024, Australian regulators expect P2 or higher for silica exposure. The company should:
- Source P2 respirators certified to AS/NZS 1716
- Ensure workers are fit tested before use
- Retest annually or when triggers occur
- Maintain fit test records for 5 years
- Provide workers with training in donning, doffing, and seal checking
If a worker repeatedly fails to fit P2 respirators from multiple manufacturers, the company should consider full-face P2 respirators or PAPRs.
Frequently Asked Questions
Can I use a P2 mask if the standard specifies P3?
No. If the occupational hygienist or WHS assessment specifies P3 (for asbestos or carcinogenic exposure), using a lower class is non-compliant and leaves workers underprotected. Use the filter class specified.
Is N95 the same as P2?
Not exactly. Both have similar filter efficiency (around 94–95%), but they’re tested to different standards and conditions. For Australian workplace use as RPE, specify P2 — not N95 — unless the N95 is TGA-approved for the specific use.
Are dual-marked respirators (e.g., P2/N95) acceptable in Australia?
Yes, if the respirator is properly certified to both AS/NZS 1716 and NIOSH or CE standards. You’ll see the dual marking on the respirator. As long as the AS/NZS 1716 mark is present, the respirator is compliant for Australian use.
Do all P2 masks fit the same?
No. Different manufacturers produce respirators with different geometries, materials, and strap designs. Fit test results are specific to the exact model tested. If you change brands or models, retest.
What is the APF?
Assigned Protection Factor is a number that represents the minimum level of protection the respirator is designed to provide if used and maintained correctly. For example, an APF of 10 means the respirator is designed to reduce the outside concentration by a factor of 10. APF is a design specification; fit testing confirms you’ve achieved it.
Can I switch to a lower filter class to save cost?
Not if the hazard assessment specifies a higher class. The hazard determines the filter class needed — not budget. However, if your assessment shows that the hazard is lower than you initially thought, you can downgrade. Always consult your occupational hygienist.
Summary: Choose P-Class, Test for Fit
For Australian workplaces, the decision is simple: specify P1, P2, or P3 respirators certified to AS/NZS 1716, based on your hazard assessment. Don’t rely on overseas markings alone. Once you’ve selected the filter class, fit testing is mandatory before use and at defined intervals thereafter. The filter matters, but the seal is what actually protects your workers.
Related Resources
- Mask Fit Testing: A Complete Guide for Australian Employers — understand the full fit testing process
- How Often Do You Need a Respirator Fit Test? — retesting schedule and compliance triggers
- Mask Fit Testing FAQ: 20 Questions Answered — detailed answers to common questions
- AS/NZS 1716:2012 Respiratory Protective Equipment — the full standard text
Need to specify respirators for your workplace or schedule fit testing? Contact Anitech for expert guidance on filter class selection and RESP-FIT accredited fit testing.
