Buying respiratory protective equipment (RPE) in the UK can feel confusing because product listings often mix terms like FFP2, P3, EN 149, EN 140, CE marked, and UKCA. This guide explains the key UK and EU standards for respirators, what they mean in practice, and how to check you are choosing compliant protection for your hazard.
📋 Key Takeaways
- EN 149 covers disposable filtering half masks (FFP1, FFP2, FFP3) for particles, including many “dust masks”.
- EN 140 covers reusable half masks, while EN 136 covers reusable full face masks, these require separate approved filters.
- Particle filters are usually tested to EN 143 (P1, P2, P3), gas and combination filters to EN 14387 (A, B, E, K, etc.).
- UK compliance is typically shown via UKCA marking (Great Britain) and EU compliance via CE marking (EU), with rules depending on where the product is placed on the market.
1) First, what counts as a “respirator” in standards language?
In European and UK standards, “respirator” usually means RPE designed to protect the wearer from inhaling harmful substances. Common categories include:
- Disposable particulate respirators (filtering facepieces, “FFP masks”)
- Reusable half masks (with replaceable filters)
- Reusable full face masks (with replaceable filters)
- Powered air respirators (PAPR) (battery blower pushes filtered air to a hood/helmet/mask)
- Supplied air / airline respirators
- Escape hoods (emergency use only)
Different standards apply depending on which category you are buying.
2) The core standards you will see most often
EN 149: Disposable filtering half masks (FFP1, FFP2, FFP3)
EN 149 is the main standard for disposable particulate respirators, technically called filtering half masks. These are the common fold-flat or cup-style masks used for dusts, mists, and fumes (particles).
They are classified as:
- FFP1
- FFP2
- FFP3
You may also see additional markings such as:
- NR (non-reusable, intended for a single shift)
- R (reusable, more robust clogging resistance requirements)
- D (Dolomite clogging test passed, better performance in high dust environments)
- V (valved)
Mask Comparison
| Feature | FFP2 (EN 149) | FFP3 (EN 149) |
|---|---|---|
| Typical minimum filtration class | 94% | 99% |
| Typical inward leakage limit (max) | 8% | 2% |
| Common uses | General dusts, many construction tasks, some healthcare uses | Higher-toxicity dusts, fine particulates, higher-risk tasks |
EN 140: Reusable half masks
EN 140 applies to reusable half mask facepieces. These do not define filtration on their own. Instead, the protection level depends on the filter(s) you fit and whether the combination is used correctly.
If you buy a half mask, you typically also need:
- A particle filter tested to EN 143, and/or
- A gas/vapour or combination filter tested to EN 14387
EN 136: Reusable full face masks
EN 136 covers full face masks, which protect the respiratory system and the eyes/face. Like EN 140 half masks, filtration depends on the filter standard and rating.
Full face masks are commonly chosen where:
- Eye protection against irritant gases/vapours is important, or
- A higher level of inward leakage control is needed compared to many half masks.
3) Filter standards you will see with reusable respirators
EN 143: Particle filters (P1, P2, P3)
EN 143 applies to particle-only filters, typically rated:
- P1
- P2
- P3 (highest particulate class)
These filters are used with compatible half masks (EN 140) or full face masks (EN 136), and also in some powered systems depending on the design.
EN 14387: Gas, vapour, and combination filters (A, B, E, K, etc.)
EN 14387 applies to filters for:
- Gases and vapours, and
- Combination filters (gas/vapour + particle)
Common letter codes include:
- A organic vapours (many solvents)
- B inorganic gases (excluding CO)
- E acid gases (for example sulphur dioxide)
- K ammonia and amines
Combination filters may be marked like A2P3, meaning organic vapour capacity class 2 plus P3 particle filtration.
A disposable FFP3 mask is not the same thing as a reusable mask with a P3 filter. They are tested under different standards (EN 149 vs EN 143 with EN 140/EN 136), and the fit, maintenance, and correct use requirements differ.
4) Standards for powered and supplied-air respirators
EN 12941 and EN 12942: PAPR (powered air) systems
Powered air systems are often tested to:
- EN 12941 (powered filtering devices with hoods/helmets)
- EN 12942 (powered filtering devices with full face masks or half masks)
You will also see performance classes such as TH or TM and class numbers (the exact class depends on the headtop style and system certification). The key point is that a PAPR is assessed as a system, not just a mask.
EN 14594 / EN 14593: Supplied-air (airline) respirators
If clean breathing air is supplied via a hose from a compressor or air source, you may see:
- EN 14594 (continuous flow airline breathing apparatus)
- EN 14593 (demand-type supplied-air respirators)
EN 138: Fresh air breathing apparatus (FABA)
Some fresh air systems are certified to EN 138 (often described as fresh air hose systems).
Air-purifying respirators (FFP masks, half masks with filters, PAPRs) are not suitable for oxygen-deficient atmospheres or unknown atmospheres. If there is any risk of low oxygen or IDLH conditions, you need specialist advice and often breathing apparatus rather than an air-purifying respirator.
5) Emergency escape respirators: EN 403 and related standards
If you are buying an escape hood for fire smoke or chemical escape, you may see:
- EN 403 for filtering devices for escape from fire (often called smoke hoods)
Escape hoods are for short-duration emergency evacuation, not for working in a contaminated environment.
6) UKCA vs CE marking, what you should look for
The legal framework in simple terms
Most workplace respirators fall under PPE rules:
- EU: PPE Regulation (EU) 2016/425
- UK: UK PPE rules (post-Brexit), with UKCA marking used for Great Britain in many cases, and CE accepted in certain circumstances depending on current legislation and product type.
Because rules and transition arrangements can change, the safest approach is to verify that:
- The product is correctly marked for the market it is sold into (GB or EU), and
- It is supported by the correct conformity assessment documentation.
What markings typically appear on compliant products
On the product, packaging, or instructions, you should usually be able to find:
- The relevant EN standard (for example EN 149:2001+A1:2009)
- The class (FFP2, FFP3, P3, A2P3, etc.)
- Manufacturer name and model
- A notified body number (for EU CE) or approved body details (UKCA), where applicable for the PPE category
If a listing only says “KN95” or “N95” that refers to non-EU standards. These can be legitimate products, but they are not automatically EN 149 compliant. For UK and EU workplace selection, it is usually simplest to choose equipment explicitly certified to the appropriate EN standard.
7) How to choose the right standard for your task
Benefits
- Dust-only task: start by looking for EN 149 FFP2 or FFP3, or a reusable mask (EN 140/EN 136) with a P2 or P3 filter (EN 143).
- Solvents/paint fumes: look for a reusable respirator (EN 140 or EN 136) with an appropriate A-class filter (EN 14387), often combined with P3.
- Higher comfort for long shifts or hot work: consider a PAPR system (EN 12941/EN 12942) matched to the hazard.
- Emergency escape only: choose an escape hood designed and certified for that purpose.
8) Product recommendations (examples)
Below are a few examples from our range that match common standards customers ask about.
3M Aura 9320D+ Unvalved FFP2 Disposable Respirator
A well-known EN 149 FFP2 disposable respirator option when you need reliable particulate protection in a lightweight, single-use format.
Trident FFP3 Valved Disposable Face Mask
A practical EN 149 FFP3 choice for higher-level particulate protection, the valve can help reduce heat build-up during more physical work.
3M Versaflo M-407 Respiratory Helmet with TR-619UK Powered Air Turbo PAPR Kit
A powered air (PAPR) helmet kit for users who need a system-based approach to respiratory protection, often chosen for comfort over longer wear times and integrated head/face coverage (certification depends on the exact configuration).
9) Common mistakes when checking standards
Avoid these pitfalls when buying or specifying respirators:
- Assuming “FFP3” alone is enough: you still need the right fit, correct donning, and suitability for the hazard.
- Mixing mask and filter systems: reusable facepieces and filters must be compatible and used as certified.
- Confusing nuisance odour relief with gas protection: “nuisance odour” layers are not a substitute for properly rated EN 14387 gas/vapour filters.
- Skipping fit testing in the workplace: tight-fitting respirators usually require fit testing as part of a compliant RPE programme.
10) Quick checklist, what to tell a supplier so you get the right standard
If you are unsure which standard applies, it helps to provide:
- The substance (dust type, wood dust, silica, solvent, isocyanates, welding fume, etc.)
- Estimated exposure level and duration
- Whether you need eye protection (full face vs half mask)
- Any facial hair constraints (tight-fitting masks may not seal)
- Work environment factors: heat, humidity, confined spaces, sparks, and so on
