British Standard

Hazards which the Respiratory Protective Equipment will Protect Against.

Type of Respiratory Protective Equipment (RPE)

Class or Filter

Assigned Protection Factor

BS EN 149

Particle filter which covers the nose, mouth and chin

Only protects against dust particles NOT against gases or vapours.

FFP1
FFP2
FFP3

4
10
20

BS EN 405

Disposable half mask mask containing a gas filtering as well as a particle filtering element.

These masks can protect against dust particles and certain types and quantities of gases and vapours. 

FFGasxP1
FFGasxP2
FFGasxP3

4
10
10

BS EN 140

Half mask cover the nose, mouth and chin. It is usually made of rubber or silicon and has replaceable filters.

P1
P2
P3
Gas
Gas+P3

4
10
20
10
10

BS EN 136

Full mask covering all the face. It is usually made of rubber or silicon and has replaceable filters.

The mask can be fitted with a series of replaceable filters to protect against dust hazards and gas hazards.

The mask can be fitted with a series of replaceable filters to protect against dust hazards and gas hazards.

P2
P3
Gas
Gas +P3

10
40
20
20

pr EN 12941

This is a positive pressure full face hood/helmet

This mask/helmet can be used to protect against dust particles and certain gases/vapour hazards.

TH 1
TH 2
TH 3

10
20
40

pr BS EN 12942

Power assisted full face mask respirator

This mask protects against both particulates and gases/vapour hazards. It is power assisted as if the power fails, the system will still filter the air reaching the worker.

TM 1
TM 2
TM 3

10
20
40

Table 2 – British Standards for Respiratory Protective Equipment