We have different types of Mask
standards that can be confusing like N95, FFP1, P2, or surgical mask. So, a
quick run cover the type and their effectiveness in filtering the particles
Generally, we are commonly used
disposable masks, with that we have 3 more certified mask types (i.e., Single
use face mask, surgical masks, and respirators).
Mask Standards and their
Effectiveness
1. Single-use masks are normally one layer, very thin and
only effective at capturing larger dust particles, but can do so fairly well.
2. Surgical masks have higher ability to capturing the
virus-sized (0.1 micron) particles, however they differ by region.
3. Pollution masks or respirators are typically captures
less than 90% of virus-sized particles. You can use the rating system in the
table above to see the exact proportion each certification requires.
Each country has it’s their own
standard certification for each mask type it varies a little from country to
country however they are broadly similar. For example, Europe uses the EN 14683
standard for surgical masks, whereas China uses the YY 0469 standard.
The ratings cover (most
importantly for us) the filtration level, among other things..
Rating covers for N95, N99, FFP1,
FFP2 and FFP3 Masks bases on the filtration level. You can think of them like
G, PG, PG-13, R ratings for movies. The movie ratings cover who can watch them
EN 149:2001+A1:2009 / ASTM F2100
/ NIOSH
These are standards for masks.
They specify the rules and testing methods companies should follow to rate
their masks. These standards define the N95, FFP1, and FFP2 ratings above.
Using the movie rating analogy, you can think of it like this: the people
reviewing movies and choosing the appropriate movie rating must have a set of
rules to decide if the movie is considered PG-13 or R. They’ll follow these
rules to rate the movie. These standards are the set of rules for masks.
Standards labelled “EN” are for
the EU. ASTM F2100 (NIOSH) is for the US. Many other countries will have their
own rating systems too.
Important Tips for Understanding
Mask Ratings
1. Three randomized studies have
found surgical masks are just as effective as N95 masks at preventing virus
transmission. They hypothesize the main reason for this is that any mask can
reduce the hand-to-face contact, although we don’t know this for sure.
2. If you’re wearing a mask with
a valve, you are protected. The valve does not bring in any outside air into
the mask. Fit-test data has found that masks with valves are often among the
highest scoring.
However, valves will not protect
other people as well. If you are sick, and you breathe out, some of the
moisture from your breath can expel through the valve, potentially putting
others in danger.
3. Tests have found that DIY
masks can filter a percentage of virus-sized particles. While they’re not as
effective as surgical or N95 masks at filtering viruses, they can still provide
some benefit. They can also reduce hand-to-face contact.
Source: Smart Air Filters
Publised by: Snehith
