How to know before buying air purifier
4 Things to Consider Before Buying an Air Purifier
Timecodes:
so diwali is here and so is the air
pollution in delhi and aliens here
now some of you may want to buy an air
purifier but then again since air
purifier are still relatively new there
isn't much clarity available compared to
smartphone and tech gadgets
of course there are a lot of other bits
worth floating around like cadr hepa
filter
etc and to make it even worse there are
few gimmicks like pm 2.5 rating on most
of the air purifier
doesn't work after a limit and some
people suggest using and plants as an
air purifier look the point is there is
a lot of misinformation and confusion
when it comes to buying an air purifier
so the question that has to be asked is
what are the things that you need to
consider
before buying an air purifier well this
is minor from techwizer.com and here are
four things that you should consider
before buying an air purifier
also if you're new here make sure to
subscribe to techwizer to stay wiser
and with that said let's begin
okay so the first thing you should look
for in any air purifier is that it
should have a true hepa filter
now a hepa filter stands for high
efficiency particulate air
but to understand it simply an air
purifier is basically a big plastic box
with two major parts
a hepa filter and a fan
now the fan usually sits on the top of
the hepa filter that passes the air
through it
thus taking in the polluted air and the
pollutant get traps in the filter and
the fan
releases the purified air and if you
take a closer look at any hepa filter
it's basically a fiberglass with very
tiny holes in it
which can trap a pm 2.5 pollutant
to give your perspective the pm 2.5
pollutant is 30 times smaller than your
hair
that's the same reason a plant can't fix
air pollution
sure they will give you some fresh air
but the effect is negligible compared to
the pollutant suspended in the air
now which hepa filter is used in an air
purifier is also important
there's the eppa filter which is the
most basic one and the one you should
avoid and then you have h14 h13 etc
the higher you go in the hepa grade the
better cleaning it does now some
companies like philips and sharp
advertise the hepa filter
on their website for instance they use
h13 which is good but i wasn't able to
find the hepa filter grade used in me
air purifier
a little bit of digging on their website
and turns out they use
a apa filter which isn't a true hepa
filter
and should be avoided so yeah before you
buy an air purifier make sure it has
true hepa filter
and also check for the grade of the hepa
filter h13 and h14 hepa filters are
usually better than the apo filters
next thing you should look for in an air
purifier is a cadr value short for clean
air delivery rate
in simple words just like you have to
buy a different ton of ac based on the
different size of a room
the air purifier also have different
cadr value
if you have a bigger room you need a air
purifier with higher cadr
such as 350 to 400 cdr for a master
bedroom
well if you have a smaller room a
typical 250 to 300 cadr will also work
now how cadr value is calculated is also
important
for example if you take a look at the
screenshot of philips air purifier
description the ceiling height is
considered to be 8 feet
now this is quite unrealistic because
most of the indian homes has a ceiling
height of at least 10
or 12 feet now both the me and phillips
air purifier claims the cad are suitable
for a master bedroom
however while testing it in the master
bedroom the me air purifier which
started at 5 34
and after 30 minutes it was able to
bring the pollution level to
90 which is good but then again it
stayed at 90 no matter what
similarly the philips 2087 which started
at 5.5 was able to bring down the
pollution level to 58
much better than the air 3 but still not
below 50.
however even after that it remained
constant at 50
never came below 50. the point is
although both of them claims to be
suitable for a bigger room
in our testing they were ineffective to
bring the pollution level below 50 since
the room was too big for them
the third thing to keep in mind before
buying an air purifier is to not get
over influenced by the smart feature of
an air purifier
now there are some a purifier out there
which has app integration work with
elixir etc etc
and these are all good things but the
primary job of an air purifier is to
effectively clean the air
if they are able to do that well and
good and only after then
you have to factor in the extra smart
feature the me air purifier also had
smart features such as scheduling
connect to wife etc and these are all
good features to have but in my
experience there was a power failure and
the me home app automatically
disconnected from the app and
i wasn't able to remotely control it
over wi-fi without resetting it again
similarly if you're buying an air
purifier just because it has a display
that's also not wise for example the
philips air purifier can only show
reading up to 280
and the mi air purifier only goes to 600
and if the pollution is more than that
you can't expect the readings to be
accurate
look the point is features like display
smart app connectivity are useful
but often gimmicky and that's why they
should never be the primary
reason to buy an air purifier rather you
should look for values like cadr or even
a true hepa filter
in an air purifier
[Music]
and the final thing to look for before
buying an air purifier is to ask
yourself which room are you gonna use it
when
are you going to use it in a properly
insulated room or are you planning to
use it in a hall
here in the closed room where the air
purifier is running the pm 2.5 level is
below 50 which is good but if i open the
door or if i go to the hall with higher
circulation the pollution goes to 400
highly unsafe and if i go all the way
outside it's 700
of course if i go back to the insulated
room it brings the pollution level below
50.
quite safe also a lot of people attach
their air purifier to the ball
the right way to use it is to leave at
least one feet of gap
in all the four sides for proper air
circulation
in simple words using an air purifier is
not similar to using an ac
you need a proper insulated room for it
to work well now
i know this isn't going to be practical
for most of us so one way to fix this
problem is to use air purifier
at night since this is the time i'm less
likely to move
in and out of my bedroom also during the
day the pollution
level is quite less in a typical morning
in delhi ncr the pm 2.5 collision is
usually goes to 600 or 700
around afternoon it falls to 750 and
when the sun is at the peak the
pollution
is lowest and at night the position
start rising again to 600 or even 700.
you can also find the similar data for
your city online and how position level
changes throughout the day
now this is not just helpful for air
purifiers but if you're someone who goes
out for a run in early morning
or late nights then you're better off
going a little bit late when the sun is
up
overall to sum it up when you are buying
in air purifier you should look for
these four things
number one hepa filter usually s13 and
14
is good to go second look for cdr
usually 350 is a good cdr for most of
the bedrooms
third don't fall for the gimmicks like
smart features and app compatibility
and four use it in a properly insulated
room
so now that you know what to look for in
an air purifier the next question is
which one should
you buy well we have done a dedicated
video on most of the air purifiers
starting with philips 2887 the me air 3
honeywell etc etc
links to that will be in the description
of this video as well as in the youtube
cards
as always it's been now signing off and
remember just because you can't see it
doesn't mean you're breathing clean air
give it a thought and
i will see in the next one
[Applause]
you
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