greetings my fellow Renegades I'll start
by saying that I am annoyed why because
I've been scammed by whom you ask well
various HEPA a purifier companies
Through The Years how are most HEPA air
purifiers a scam well the answer to that
will be revealed as you watch first I'll
tell you a story about why I started
getting skeptical about the efficacy of
most HEPA a purifiers in the first place
one day an indoor environmental
professional or IEP came to my house to
do a Ron test in my house there were a
couple DIY air purifiers I had built
which were inspired by the Cory
Rosenthal box or CR box design by Jim
Rosenthal and Richard Cory CR boxes are
typically built from four MV 13 HVAC
filters attached to a box fan that sucks
air through the filters so anyway the
IEP saw one of my CR boxes and he said
those are pretty good at capturing
larger particles but they're pretty bad
at capturing tiny particles HEPA a
purifiers are way better at capturing
tiny particles
you should use a hea let me quickly
explain about particle sizes so there
are basically a few categories of them
there's pm10 which are 10 microns or
fewer in diameter so this category
includes larger particles like dust
pollen Etc and everything smaller
another category is PM 2.5 or fine
particulate which are 2 and 1 12 microns
or fewer so this category includes some
combustion particles Metals Etc and
everything smaller PM 2.5 is consisted
considered dangerous for us healthwise
because it can get into our bloodstreams
and accumulate in organs which can cause
illness there is extensive evidence
about the health impacts of particulate
matter let's talk about one of the many
many many studies this is epidemiology
data from the Harvard six City study
they measured fine particle
concentration in a bunch of different
cities and relative mortality rate and
as you can see as fine particle
concentration goes up relative mortality
rate goes up as well and in another
study published in the lanet you can see
that poor indoor air quality and ambient
particulate matter are among the leading
causes of death this is 2.7 million
deaths caused from poor indoor air
quality here's another study about the
causes of global ill health and you can
see that in the top 10 are ambient
particulate matter and household air
pollution for men and women and we need
to note that exposures to air pollution
occur predominantly indoors because we
spend 90% of our time indoors so for
this reason that my IEP said to get a
HEPA air purifier so I went on Google I
think I Googled something like HEPA
versus MV and was brought to this EPA
page this chart lists the Merve ring of
HVAC filters and their single pass
filtration efficiency at different bins
of particle sizes in microns single pass
filtration efficiency is basically the
percentage of particles passing through
the filter one time that get captured by
it and therefore removed from the air
AKA capture efficiency let's go to MV 13
which is is the rating of the HVAC
filters in my DIY unit 90% of particles
between 3 and 10 microns are captured
90% is pretty good 85% of particles
between 1 and three microns that's a bit
worse and only 50% of particles between.
3 and 1 microns that doesn't sound great
at all so a lot of pm2.5 doesn't get
captured by MV 13 if we scroll down we
actually see a HEPA rating as well
99.97% of part particles in the 3 Micron
range are captured and particles that
are larger or smaller than3 microns are
captured with a greater than 99.97
efficiency that sounds way better than
the Merv 13 filters I was using and you
might be able to see where this is going
right so then of course I went searching
for a HEPA air purifier to buy and I
ended up buying three units from a brand
that was recommended by a few mold
inspectors that I follow and I trust I
won't say which brand but it promised
incredible efficiency better than
standard hea so I was super excited when
my three shiny new HEPA units arrived in
the mail I immediately turned them on
and I shut off my two DIY air purifiers
when I first ran my new machines the
first thing I noticed was that not much
air was actually blowing from them so I
turned them on high speed which made
them really noisy and a little more air
was coming from them but it still wasn't
a lot so I figured hey you know their
filtration is so efficient that maybe
they can get away with filtering a lower
volume of air right just logic so I
moved on with my life and after a couple
days my nose started to itch a bit more
and after a few more days my allergies
had gotten pretty bad and I was sneezing
a lot my soft pallet would actually itch
in the middle of the night and wake me
up I was pretty environmentally
sensitive as I had mold illness from
which I'm actually still recovering but
anyway it took me a bit to think that
maybe it's the new Air Purifiers at
first I had like a mental block
preventing me from questioning them
because I thought well it couldn't be
them they're supposed to be incredible
but then I came to my senses and I
turned them off and replaced them with
my DIY units from before within the day
my allergy symptoms started lessening
and over the next week they got
progressively better and better and so
at this point I'm starting to notice a
new symptom a subtle feeling of anger
smoldering in my chest did I get duped
by HEPA a purifier marketing so what do
I do when I'm angry you guys might be
able to guess I research and honestly
whenever I'm feeling any emotion I
research you know it's interesting most
of my emotions have curiosity tied to
them in some way and so anyway my
research question was how can HEPA aair
purifiers capture virtually all
particles that pass through them but
still leave the air dirty is there a
better way to measure their performance
turns out there is introducing clean air
delivery rate or
cadr welcome to the Healthy Home guide
this is a place where I share practical
budget friendly tips for creating a safe
and healthy home whether the word home
refers to your house or your body please
go ahead and like this video And
subscribe and share it with someone who
you think needs an air purifier that
works back to the video clean air
delivery rate or cadr is basically how
quickly clean air is supplied to a space
it can also be thought of as how quickly
a pollutant is removed from a space
you'll see it as lers per second cubic
feet per minute Etc so cadr equals
removal rate but why does removal rate
matter well because there's also a rate
at which pollutants in this case
particulate are being generated in a
space so particulate is being
continuously introduced into your home's
there from various sources including the
outdoors cooking mold our body shedding
skin cells uh us moving around the house
and stirring it up and More in order to
significantly lower the concentration of
particulate in your air the removal rate
or cadr must be high enough to
counteract the generation rate let me
put it practically when your air
purifier has a high enough CDR for the
space it's in there is less of a chance
that particulate concentration will
build to an unhealthy level if it does
it won't stay there as long your
duration of exposure will be shorter in
determining the performance of an air
purifier from an indoor air quality
perspective cadr is the only measurement
that matters because it's a direct
reflection of how clean the air will be
let's go back to my initial question how
how can a HEPA a purifier capture
virtually all particles but still leave
the air dirty to answer that I'll tell
you this extensive research shows that
DIY air purifiers CR boxes basically
using MV 13 filters tend to achieve much
higher cadrs than HEPA a purifiers to
help us understand why we'll talk to
Wayne Westerman and Rob wisman
co-founders of Clean Air kits a company
that makes and tests air purifiers that
actually work at an affordable price
point Wayne and Rob will introduce the
concept of how MV 13 filters can
outperform HEPA in in room particulate
purifiers the most important metric is
how quickly are you removing the
particles from the room so if you look
at a Mur 13 filter for viruses yeah it's
capturing about 75% of the particles per
pass but you got you know these two big
fil treats here you got an enormous
amount of area if you're building a Cory
Rosen doll box is like four filters it's
enormous area for that to happen so the
total number of particles you're
capturing is going to be really big so
here this big blue arrow that's your
equivalent of how much air is coming
through perfectly clean now there's 25%
leaking through this still dirty and
everything disperses and mixes very
quickly so it doesn't really matter if
it's all perfectly pure coming out what
matters is how many parles did I capture
on that pass so if we go down to the
heas and they'll say oh well we're you
know hea 13 it's
99.97% that means that the air coming
out of the HEPA is perfectly pure at the
outlet it's got a very tiny amount of
contamination still left but it's a much
much smaller stream in most cases for
the same cost or for the same amount of
noise that cleaned airst stream is Tiny
and it's got to mix back into the room
too so it's not capturing nearly as many
particles because the incoming stream is
Tiny and it doesn't really matter that
you perfect purify a thle full of air
and throw it back into the room it's
still got to mix back in overall MB 13
gives us a much much more efficient
operating point from the standpoint of
fan RPMs and noise and energy to capture
the same number of particles as these
restrictive HEPA that say you know 99.97
single pass efficiency and the only
reason the whole industry ended up at
you know he age 13 is because they
glommed on to marketing this 99 9.97%
number which isn't even the right metric
for a room purifier amen so with hea to
get a high cadr what what do you
actually need to do there's two
directions they can go right they can
put a big honken fan on it that's really
powerful and really loud or they can
make a big honken filter which it just
takes up a lot of room in your room and
it's going to be really expensive to buy
replacements for it right that's how
they can make it either quieter you know
or powerful or both right and there's
some serious trade-offs there in terms
of user experience and costs well said
really well said isn't it true also that
many HEPA air purifier Brands don't even
report cadr in the first place so when
you look at websites for HEPA air
cleaners yes some of them don't
advertise the catter right and there's
probably a reason for that and it's not
that they don't know the catter for that
device so that's just something that
cons should be aware of right I say cadr
when and Rob say CER we both mean clean
air delivery rate and there are a few he
brands that do report cadr among those
can we trust that number or is that
number a little misleading a lot of the
time there is a single number reported
and when that's the case the number is
going to most likely be from the highest
and the loudest setting that's available
on that device right because that's
going to give them the biggest air
cleaning that's when the fans moving the
fast so what do I do to counteract the
influence of deceptive marketing I go up
to my proverbial rooftop and I shout
about the research in this study by
Porto at all they measured the
performance of this DIY Cory rosenal box
which was basically just a box fan and
MF 13 filters in both home office and
classroom settings for particles greater
than 0.5 microns figure 2A shows that at
the lowest speed its clean air delivery
rate is around 600 CFM which is really
high um that's much higher than the two
commercially available HEPA air
purifiers that they tested on maximum
speed not only that but the CR box saved
money relative to the heas the lowspeed
CR box was around 1110th the initial
cost of the HEPA per unit of air cleaned
figure 3B shows cadr at different
particle sizes the heas are in the Blues
and the CR boxes are in the warm colors
as you can see the cadr barely varies
across particle size and the small
variation that does exist below 7
microns is consistent between
and the CR box so the murf 13 DIY air
purifiers were still effective across a
range of particle sizes I'll delve into
that later when I talk about ultra fine
particles moving on noise levels of both
the CR box and the HEPA were high that's
because the CR box used a box fan there
are quieter fans that these researchers
could have used more on that later our
next study is by SRI Krishna at all who
tested a bunch of DIY air purifier
configurations against Best in Class
HEPA air purifiers I'm going to focus
specifically on their CR box
configuration here versus the best HEPA
here this hea on a high speed had a
significantly lower cadr than the MV 13
CR box at its lowest speed I'm sensing a
trend this was for particles AT3 microns
which is the most penetrating particle
size or mpps meaning the size of
particle that filters are the worst at
capturing so this size of particle is
good to use in testing because it tells
us the worst case scenario Moving On The
Upfront cost of the components of the CR
box was around five times cheaper than
the hea like this video if you're
starting to see why I'm angry here's a
figure that shows efficiency in the red
line yes even though the capture
efficiency of the HEPA was higher than
the CR box the CR box still clean the
air better here's a good quote about
that concept by Joey Fox an HVAC
engineer who writes amazing IAQ articles
some of which I Linked In the
description for you a CR box uses MV 13
filters which can only remove 60 to 80%
of those particles but the fan on the CR
box is much bigger and can clean more
air all you care about in the end is the
total rate at which the air is cleaned
so what the CR box lacks in efficiency
it makes up for an airf flow before I
move on I want to point out something
interesting the HEPA units efficiency
actually measured lower than
99.97% which is the expected efficiency
of HEPA more on that later this third
study by holder at all demonstrates that
DIY air purifiers can even be effective
at capturing Wildfire smoke which mostly
measures3 microns this murf 13 CR box
vastly outperformed a commercial HEPA a
purifier in terms of cadr and also
initial cost per cadr and cadr per watt
interestingly the researchers found that
filters that are saturated with Wildfire
smoke perform much worse in terms of
cadr so remember to change your filters
frequently during Wildfire season here's
an amazing review that compiles a lot of
the available data about DIY air
purifiers it's laid out really
conveniently so you can see lots of
metrics in one place for the studies I
just went over and others basically DIY
air purifiers consistently Beat
commercial heas in terms of cadr cost
per cadr and cadr per watt so with their
great airflow these DIY CR boxes clean
the air faster cost less UPF front and
use less electricity even though they
use MF 13 filters which are less
efficient than HEPA so in the studies I
just went over we saw that MF 13 filters
can capture fine particles as small as3
microns but what about ultrafine
particles which are .1 microns or fewer
so let me explain one argument that
people who are brainwashed into touting
HEPA air purifiers repeatedly make is
that HEPA can capture ultra fine
particles while other filters can it is
true that HEPA filters can capture
ultrafine particles in fact HEPA filters
are better at capturing ultrafine
particles than they are at capturing
slightly larger particles this goes back
to the concept I mentioned earlier of
most penetrating particle size or mpps
which is around3 microns to recap
particles around3 microns are the most
difficult for hea to capture and HEPA is
better at capturing particles both
larger and smaller than3 but see the
thing they don't tell you is that Merve
filters exhibit the same phenomenon
figure five from AI at all shows the
size resolved remov efficiencies for
Merve rated HVAC filters so how
efficient they are at different particle
sizes on the x-axis you can see the
particle size from
0.001 microns which is well into the
ultra fine range to 10 microns or a
larger particle on the Y AIS is removal
efficiency so the higher the better on
top you can see HEPA which is of course
the most efficient of all filters near
100% no matter the particle size but
being the most efficient at smaller and
larger sizes than mpps as we went over
but see the same phenomenon can be
observed for all of the Merv rated HVAC
filters MV 13 isn't in this figure but
we have M 12 and 14 so we can
extrapolate especially MV 16 and mve 14
and even MV 12 all approach near 100%
efficiency for ultrafine particles so
HEPA is not needed for ultrain particle
capture HVAC filters can do it too and
see here that Steven Z all demonstrates
a similar phenomenon in figure three for
the Merv 13 filter see but these studies
measured single pass efficiency for a
standalone HVAC filter what about in the
context of a DIY air purifier with four
filters Myers at all demonstrates that
indeed cadr of a CR box in the brown is
lowest at the mpps of around3 microns
and increases slightly as we get more
ultra fine down to 01 microns I'd like
to point out that these researchers
didn't measure particles as Ultra ultra
fine as the previous study and if they
had I'd expect to see cadr increasing
more on on the Left End as the particles
get more ultrafine even so the data
shows that CR boxes can absolutely
capture ultrafine particulate and just
like HEPA they're even better at it
remember earlier when I mentioned that
the HEPA air purifier from Shri Krishna
at all had an efficiency lower than
99.97% its expected efficiency this may
be because on turbo speed the speed used
to Market their cadrs most HEPA units
are running at a velocity much higher
than the velocity used to test their
filtration efficiency in this context
the faster air flows through a filter
AKA face velocity the more particles can
penetrate through it without getting
captured we don't want penetration and
indeed this study by Chang at all shows
that penetration decreases as air
velocity drops especially for ultra fine
particles interestingly so the fact that
low velocity lets fewer particles
penetrate is good for CR boxes because
generally velocity will be much lower in
a CR box than a HEPA unit this is
because CR boxes tend to have a much
larger filter surface area so they have
four filters that's a lot of area also I
especially love this study because it
used 3M filt treat filters the best HVAC
filters right now according to numerous
testers one being the 3D handyman so
it's pretty clear that CR boxes are
amazing but can they protect us from
viruses this is a presentation by Dr
Katherine Ratliff from the EPA in which
a non-pathogenic virus was aerosolized
in simulated saliva in a large 3,000
cubic foot chamber the results the murf
13 CR box Drew Down 97% of Bio aerosols
in 30 minutes and 99.4 in 60 far better
than control which was the CR box turned
off cadr was 234 CFM so yeah I mean DIY
air purifiers can protect us from
viruses too so now we know that CR boxes
leave HEPA a purifiers in the dust in
terms of initial cost Energy Efficiency
and of course clean air delivery rate no
matter the particle size however both
HEPA units and CR boxes can be a bit
noisy is there a way we can retain the
high cadr of CR boxes but use a quieter
fan than a box fan remember Wayne and
Rob from earlier they've figured out a
way at their company clean air kits they
make a line of air purifiers that are
quieter and more energy efficient even
than standard CR boxes while still
retaining some of the design featur Fe
that make CR boxes so effective in terms
of cadr the key PC fans can you guys
talk about how PC fan CR boxes can save
hundreds in electricity and filter
replacement cost compared to large heas
with equal clean air delivery PC fans
have been you know optimized by very
competitive industry for quietness and
Energy Efficiency and uh we found that
the 120 mm size seems to be the the most
efficient size and then we went through
through all the brands to see which was
the quietest and most coste effective
and on this chart you know was per occup
on this axis and dollars per occupant
we're just kind of off the charts way
more efficient we're under $20 per
occupant and this is assuming continuous
operation throughout the year and and uh
you know a filter change every year and
sampling of other heas is costing twice
as much and often using uh several times
as much power to do the same thing
amazing wow so can you talk about your
process for selecting the specific PC
fans that you ultimately went with we
took even from you know the the Dozen
leading models of of static pressure PC
fans we we evaluated all those in terms
of of noise and the prices they were
available at us and we settled on The
Cooler Master brand for most of our
products they have these CLE flow and
Mobius fans and they are just a couple
debels quieter than their competition at
at these operating points and they're
and they're really well built too
they're they're robust and they are UL
registered so that allowed us to pursue
ul507 certification and that's going to
you know help us get in again into
classrooms and and Commercial settings
all right so Wayne um how do clean air
kits compare with CR boxes uh our
products are the the blue stars on this
chart this is a sample CR box they can
be anywhere from 250 to 400 by some by
some measurements on their low and
medium speed and then if you turn the
box fan up to high it would be up here 6
or 800 CFM really really good except you
know on high they're really really loud
too this chart was originally put
together early in the pandemic like 2021
and it's got all these he hea Brands you
want to be up in this corner as far as
you can on the chart because you're
you're getting high CER and low cost and
you can see we're we're kind of leading
the front the March toward that corner
compared to all the heas and the
remarkable thing is we're doing it while
being quieter than all of them and if
you took these all these heas in red and
green and you tried you turn down their
speed till they were in the blue range
of 40 50 dbel speed then you'd be
measuring them you know they're going to
again drop in half in their CER
performance they're all going to be
clustered way down here in short we can
match the catter of a CR box on Lower
medium with our range of models with 5
to n or 10 PC fans we're going to use
like 1 the energy of the CR box and
we're going to be uh at least 10 DB
quieter one convenient feature about
clean air kits that I wanted to mention
is that when the power goes off and then
goes back on again clean air kits are so
simple that they'll automatically turn
back back on when the power goes back on
next Wayne from clean air kits is going
to talk about a deeply informative
experiment where he compared the
luggable XXL from clean air kits to a
HEPA unit for viral sized particles this
was a well-rated well-regarded popular
commercial HEPA unit both the luggable
XXL and the HEPA unit have cadrs of 400
CFM so they have the same cadr so how do
other aspects of their performances
compare Wayne they're both doing what
they said they're doing 400 catter
they're bringing the particles down
overall it's the same but the PC fans
are doing this with about 46 47 dbel of
noise through their Merv 13 and using 15
watts of electricity the heas on turbo
64 DB almost 20 DB louder on turbo that
you know sounds like a little mini jet
engine next to you and 49 Watts three
times as much power to do this so this
is a you know practical example our rule
of thumb is if you're buying a hea and
it has a catter rating chances are in
practice you're going to get half the
cat out of that by the time you turn it
down to medium where it's below 50 DBS
in tolerable so we show that in this
chart we turn that that hea down to half
and it's its rate of draw down fell in
half instead of getting 4.5 a it was now
getting only 2.4 a so to get it back up
to 400 CER CFM you have to buy two of
them and run them on medium I'm going to
point out an unexpected finding here the
luggable draw down was much cleaner than
the HEPA units indicating that the
luggable with its PC fans facing
different directions more effectively
dispersed clean air throughout the space
so that leads us to the ultimate
question which air purifier should you
get well you have three options option
one you can buy from clean air kits I
have three of their bris boxes and I
absolutely love them clean air kits are
also reasonably priced so you can buy bu
more of them if you need to cover more
space in your house clean air kits even
has prettier ones for the aesthetically
sensitive Among Us option two you could
check out clean a stars.com which is a
website that compiles data for tons of
air purifiers and has a helpful
selection tool there are some HEPA units
on there that are actually decent like
the smart Air Blast but they're more
expensive overall option three you could
build one yourself what option would I
recommend I'd recommend buying from
clean air kits because the PC fan
designs they use are the best balance of
cadr noise cost and Energy Efficiency
that I know of given all the data I've
shared it's clear that a CR box type
design with MV 13 HVAC filters is your
best bet not HEPA whether you buy from
clean air kits or build it yourself if
you are leaning towards building one
yourself you might be wondering which
design to build some of you might even
be curious about my own DIY air purifier
design this one right here the one that
brought many of you to my channel I
still still think this is a great option
It's relatively easy to build quiet
relative to designs that use box fans
and Powerful to this day I still have
one in my bedroom and this one in my
office and they keep particle counts
super low the AC Infinity fan in my
design also generates even more CFM than
a standard box fan according to the
specs as well as my own testing full
disclosure though I have not tested my
design cadr because it's a fairly
involved process however my design is
pretty similar to standard CR boxes
which tend to have cadrs of around 400
CFM or above so I imagine my design has
a similar cadr that is just a theory but
it is supported by the following
findings from holder at all the cadr was
minimally impacted by different
approaches to attach the filters to the
fan showing that DIY air cleaner
performance may be largely independent
from how the user constructs them still
I don't want to be a hypocrite I do plan
on testing its cadr at some point and
until I do take my words with a grain of
salt or did I say a grain of particulate
before you do get an air purifier please
keep this in mind make sure it cadr is
high enough for the particular space
you'll be putting it in there are a few
ways to do this but the easiest and
quickest is ah's 2/3 rule which states
that the cadr of your air cleaner should
be equal to at least 2/3 of the room's
area for example a room with the
dimensions of 12 ft by 15 ft has an area
of 180 ft 12 * 15 so use an air cleaner
with with a cadr of at least 120 CFM and
that's from 180 * 66 or 2/3 for Wildfire
smoke though cadr should be equal to the
size of the room in square feet so 180
CFM in this case another great sizing
method is ashray 241 if you're concerned
about infectious aerosols in the
interest of conciseness I won't go over
that in this video now I'm going to give
my opinion on sizing for homes I
actually prefer cadr to be closer to
twice the room area because I'm
environmentally sensitive you can use
multiple air purifiers to achieve this
for example in my open kitchen/living
room space which is around 500 squ ft I
have three brisk boxes from clean air
kits Each of which has a cadr of 300 CFM
so 300 * 3 equals a total of 900 CFM so
900 is almost twice the room area of 500
that's what you want to shoot for again
this is just my opinion of what works
for me as someone with bad environmental
sensitivities this method also applies
to those living in homes with really bad
air quality like if you have a bad mold
problem and you're not able to leave so
yeah with cadr twice the room area your
air is going to be a lot cleaner now
Wayne from clean air kits is going to
talk about his pretty innovative air
cleaner layout strategy that's
especially useful for those who are
concerned with viral Transmission in
their homes so you guys have an air
cleaner called the exhaler on that does
something especially unique unique that
I don't think most people are even aware
that air purifiers can do can you talk
about it what it's going to do is
basically create so much suction that
the people surrounding it 3/4 of their
breath is just going to go through and
instantly get filtered before it even
spreads into the room so this is
nearfield Source control of about the
level of uh cloth or surgical mask that
you know most people wore in the
pandemic not as safe as if they were
wearing their n95 but it's still you
know a two or 4X jump in safety
instantly for everybody in the room and
it's so quiet it doesn't bother anybody
I can work with this thing I can have a
meeting with this thing right next to me
and I can put it on my nightstand
there's no other hea on the market
that's quiet enough to do this it's
another 3 or 4X margin of safety over
just the overall room air cleaning in
the bigger rooms like your dining room
your open areas will have either like a
luggable XL or um a tower of power or an
in table that has you know 7 to 10
sickle flow fans that are covering these
large spaces of 500 to th000 square feet
and then putting acceleron on the
nightstands in each bedroom it's big
enough to to do about 5 AC in the room
just as a room purifier uh especially if
you put it on both nightstands it's
going to pull your your breath as you're
sleeping immediately going to pull it in
and clean it and pull it away from your
partner who's sleeping next to you we
did a cool video of this with a fog
machine when we have guests over for
dinner and sometimes even you know for
breakfast for ourselves we we'll put
acceleron on the dinner table the
sharing of breath across the table when
you have one of these present is greatly
reduced now I'm going to preemptively
address a couple questions that I
suspect you guys are going to ask me
question one are there situations where
the high single pass efficiency of HEPA
filters is actually useful absolutely
like if one space is dustier and another
space is cleaner heas help keep the dust
out of the cleaner space don't worry I'm
going to give you an example in HEPA
vacuums HEPA filters are crucial to keep
particles from the dusty floor from
being dispersed into the air question
two many commercial air purifiers have
activated carbon filters while CR box
slpc fan air purifiers generally don't
is this a big loss and like is activated
carbon as useful as people think in this
context or Joey fox has an amazing
answer for this in his article called
how to pick an air cleaner Linked In the
description carbon filters can remove
voccs ozone and odors they can
potentially be effective if sized
properly however air cleaners rarely
provide equivalent outdoor air delivery
rates for the carbon filters they also
become saturated over time and would
then become ineffective unfortunately
many portable air cleaners do not
provide clear information on the
longevity and effectiveness of their
carbon filters while carbon filters are
a harmless feature they may not
necessarily deliver the desired results
additionally carbon filters do not
remove particulate matter which includes
Airborne diseases therefore they have no
impact on addressing health concerns
related to viruses or other particulate
matter in general when dealing with
voc's and odors the most effective
approach is through ventilation by
supplying fresh outdoor air to the space
considering the uncertainty surrounding
the effectiveness of carbon filters they
are not something that should generally
be pursued but should not deter you from
purchasing the air purifier alt together
in that same article Joey also talks
about why prefilters and other features
may not be necessary hint they're trying
to take your money so yeah when it comes
to air purifiers there's a lot of really
bad advice out there I've gotten bad
advice even from people that I trust
let's never again let anyone manipulate
us into getting locked into a
proprietary system that profits from us
buying needlessly expensive filters and
replacing them too soon and that
sacrifices our health for their bottom
line this is why I call you guys my
fellow Renegades on this channel because
let's be Renegades let's divorce
ourselves from these broken systems that
manipulate us and profit off of us the
reason why I'm so angry is because us
having the right air purifiers is
literally a matter of life and death as
these studies and many others show in
the figure on the left the higher the
particulate concentration in a given
City the higher its mortality rate on
the right ambient pm and poor indoor air
quality are now among the most common
causes of death right up there with high
blood pressure poor diet smoking and
alcohol use through the years I've
bought numerous brands of overpriced and
ineffective HEPA units now that I know
about clean air delivery rate my days of
being scammed are over it's my hope that
this video gets shared enough to reach
some IEPs and helps them share
information that benefits their
customers I know you learned something
today so please like this video if you
did and subscribe for more content like
this please comment as well I want to
hear your thoughts I want to hear your
questions I want to hear from you if
you're able to donate to my channel
please do so at the link in the
description and finally my fellow
Renegades I salute you