FFP1 filters at least 80 percent of airborne particles, FFP2 at least 94 percent and FFP3 at least 99 percent. Those three numbers are the headline, but they are not the whole story, and the second set of figures matters more on a real job.
Alongside filtration efficiency, each class carries a maximum permitted total inward leakage: the proportion of contaminated air that gets past the mask rather than through it. FFP1 allows up to 22 percent, FFP2 up to 8 percent and FFP3 up to 2 percent.
Leakage is where most masks fail in practice. A perfectly good FFP3 worn over stubble performs worse than a well fitted FFP2, which is why specification alone never guarantees protection.
What the EN 149 Standard Actually Measures
All three classes are defined by EN 149, the European standard for filtering half masks against particles. It is maintained through the European Committee for Standardization and applies across Cyprus and the rest of the EU.
The standard tests each mask against sodium chloride and paraffin oil aerosols, measures breathing resistance, and assesses total inward leakage on a panel of wearers performing set movements. A mask that passes carries the EN 149 marking together with its class.
In practical use, protection factors are applied to each class to estimate how much a mask reduces exposure. FFP1 is commonly treated as reducing exposure by a factor of around 4, FFP2 by around 10 and FFP3 by around 20. These figures assume correct fit and correct wear.
Anything sold as a respirator without an EN 149 marking and a CE mark is not legally valid respiratory protection, whatever the packaging claims.
FFP1
Minimum 80 percent filtration, maximum 22 percent leakage.
FFP1 handles nuisance dust and coarse non toxic particles. Think general sweeping, light sanding of non hazardous material, loft insulation handling or basic DIY work.
What it does not handle is any particle classed as toxic, carcinogenic or fibrogenic. FFP1 has no place on a site where silica, hardwood dust, asbestos or welding fume are present, and specifying it for those tasks is a compliance failure rather than a cost saving.
FFP2
Minimum 94 percent filtration, maximum 8 percent leakage.
FFP2 is the working standard for a large share of industrial tasks. It is appropriate for softwood dust, plasterboard sanding, cement handling, fibreglass work, general metalwork fume at low concentrations, and agricultural dust.
It is also the class most people recognise from healthcare settings, where it is used against biological aerosols.
For most mixed construction work that does not involve cutting stone or concrete, FFP2 is the sensible default.
FFP3
Minimum 99 percent filtration, maximum 2 percent leakage.
FFP3 is required wherever the particle itself causes serious harm at low doses. That includes respirable crystalline silica from cutting, grinding or drilling concrete, stone, brick and tile. It includes hardwood dust, which is classified as a carcinogen. It includes welding fume, lead, cadmium and work involving asbestos.
Guidance published by the European Agency for Safety and Health at Work treats respirable crystalline silica as one of the most significant occupational exposures in construction, and the control measures expected go well beyond handing out a mask.
Silica work in particular demands FFP3 as the minimum, combined with water suppression or on tool extraction. The mask is the last line, not the first.
What the Letters After the Class Mean
The class is only part of the marking. The suffixes tell you about service life and performance.
- NR means non reusable. The mask is for a single shift and gets discarded at the end of it.
- R means reusable. It can be worn across more than one shift, subject to cleaning and inspection.
- D means the mask passed the dolomite dust clogging test. It breathes more easily over a full shift in dusty conditions.
A marking of FFP3 NR D tells you it is a 99 percent class mask, single shift use, with good breathability in heavy dust. For long shifts in dusty environments the D rating makes a noticeable difference to whether workers keep the mask on.
Valved or Unvalved
Valved masks have a one way exhalation valve that releases warm moist air on the out breath. They are considerably more comfortable over long periods, reduce fogging of eyewear and lower heat buildup.
The trade off is that a valved mask protects the wearer only. Exhaled air leaves unfiltered, so valved masks are unsuitable where the wearer might be a source of contamination, including clean rooms, food production and healthcare.
On a dusty construction site in Cyprus summer heat, a valved FFP3 is usually the right call, and the comfort gain translates directly into compliance because the mask stays on.
Why Fit Beats Class
A mask only works if it seals against the face. Three things break that seal.
Facial hair is the most common. Even a day of stubble along the seal line significantly increases leakage, and no amount of adjusting compensates for it. Workers who will not shave need a powered air purifying respirator or a loose fitting hood instead.
Face shape is the second. Masks are not universal, and a model that seals well on one person leaks on another. Holding a small range of shapes solves more problems than upgrading the class.
Interaction with other PPE is the third. Spectacles, goggles and helmet straps all disturb the seal if fitted in the wrong order. Match eye protection to the mask rather than treating them as separate purchases, and train workers to fit the mask first.
Face fit testing, carried out when a new model is introduced and whenever a worker’s facial appearance changes significantly, is what turns a specification on paper into actual protection. The Department of Labour Inspection expects employers to be able to demonstrate that the RPE they supply is suitable for the individual wearing it.
Frequently Asked Questions
Is an FFP2 mask enough for cutting concrete?
No. Cutting, grinding or drilling concrete releases respirable crystalline silica, which requires FFP3 as a minimum. It should be combined with water suppression or on tool dust extraction rather than relied on alone.
How long can an FFP3 mask be worn?
A mask marked NR is for one shift only. Masks marked R can be reused subject to cleaning and inspection. In practice, any mask should be replaced once breathing resistance increases noticeably, or if it becomes damp, damaged or contaminated.
Can I wear an FFP mask with a beard?
Not effectively. Facial hair along the seal line prevents a proper seal and leakage rises sharply. Workers with beards need a powered air purifying respirator or a loose fitting hood rather than a filtering half mask.
What is the difference between FFP3 and N95?
They come from different standards. FFP classes are defined under the European EN 149 standard, while N95 comes from the American NIOSH system. N95 filters at least 95 percent, placing it between FFP2 and FFP3 in performance.
Do valved masks protect other people nearby?
No. Air leaving through the exhalation valve is unfiltered, so a valved mask protects only the wearer. Use unvalved masks where the wearer could contaminate the environment or other people.
How many mask types should a site stock?
Most sites manage well with two: an FFP2 for general dusty work and a valved FFP3 for silica, wood dust and fume. Holding two sizes or shapes of each covers the fit variation across a crew.
Specify by the hazard rather than by habit, confirm the fit before the work starts, and keep enough stock on site that nobody carries on working with a clogged mask. Companies running multiple crews usually find it easier to standardise on two models across all sites and supply them through a B2B account rather than buying ad hoc.