so then class today we've got the exciting subject to looking at co2 carbon dioxide
so that's uppercase c o subscript for number two so we're going to look at the handling and
management of that in in an environment you just couldn't make it up could you
not go to you to wake up and join us as we review this silent eco-watt van from Envirovent well
that's all right it was a bit of a revelation actually how many years did you spend as a teacher
19 years teaching yes yes and for all these years you just thought it was your teaching style that
sent people to sleep yeah no i didn't think that no he didn't well if you want to comment on gary's
teaching style drop a comment below but actually as you did touch on there we're looking at today
at the relationship between co2 and that can have a dramatic effect on people in an environment if
the concentration's too high can cause headaches drowsiness things like that so that's really why
people were dropping asleep in your legs and also at the moment it's a really hot topic is it about
moving air in these currently difficult times as well yeah it is that's yeah that's a big topic
so it's also a great opportunity for electricians to get in be seen to be advising their customers
on some great options and this in-line fan is a good option it is running at the moment and it is
super silent okay apart from our breathing you can probably hear which will come in handy or we think
at some point in order to to get it to far into action yes yeah so perhaps first let's have a look
a little look at the setup that we've built here in front of us right so let's have a quick tour
of the setup that we've built here here's our silent ecowatt fan so yes it does look like a
jet engine but it doesn't sound like one and what is that because there's a lot of attention being
played to reduce in vibration but also absorbing the sound that's created by the motor inside
here special acoustic installation and that's yeah that's one of the unique points of this
uh while we're here okay let's have a look at some electrical points here this is this is obviously
where we bring our cabling in there we've got two wires coming in here one's our main supply
this one here is the variable speed control and that's a 0 to 10-volt signal and that
decides what speed the fan operates at we'll come back to that in a little while
this is the 150 millimeter version that at maximum power is 39 watts ip44 rated and suitable for air
temperatures between minus 20 and plus 40 degrees okay so that's the fan down to the controls this
box here is the receiver for our CO2 sensor which again we'll come on to in a little while
so again that has the main supply to it and there's 0 -10 volts signal that goes up to our fan
that talks to this clever piece of kit here which is doing the co2 sensing okay and again this has
a main supply but communication between this and the receiver here is an rf signal so you have to
pair these and we'll have a look at how we do that in a while so we've got a variable speed
fan in front of us but why would you want it to be variable okay obviously there's recommendations
for how often the air should change and that is based upon occupancy right so obviously you
risk you know designing for maximum occupancy and you end up with a yeah a jet engine running
at full power all the time and obviously that obviously causes energy efficiency issues as well
but it's best to vary that output depending on how many people are in the building and oh and what
else they're doing in the building yeah i can say they could come in and out it might be a sports
hall you might have 100 people in there and then three people doing yoga another time yeah so we
can increase the speed by obviously altering the co2 in here are we going to do that now shall we
breathe on it now normally you know electricity probably might have fitted a humidity sensor
yeah for um obviously humidity steam from showers and things like that so you might
not be too familiar with a co2 sensor but yeah if this is this is the sensor itself it's got this uh
green led at the bottom right so at the moment it's operating at a low level
so this is this is at about 10 watts so we're moving 67 liters of air per second
okay that makes sense yeah but it is again super silent and the silence will be improved right
by actually having the actual ducting on it as well so yeah that will actually limit the sound
as well yeah and obviously yeah obviously ducting has a huge performance and
yeah if you if you're designing a system we recommend just get in touch with environment
they're there to help you with that system design but let's have a let's have a crack at let's go
breathing's come in handy for all those people who've noted that in the past deep breath
it's green at the minute
i'll take it for the rest of the shot i'm going to be doing this am i yeah yeah
could be fun yeah for one of us you're not playing the harmonica together sorry officer
oh amber yes it's going to amber okay so obviously there is a time lag this doesn't
sense in real time at some point the founder fan will sort of step up to a higher level
i'll keep going to red oh yeah there you go we can stop now
okay so this will pick up yeah it's already picked up yeah but from previous experience
that that sounds like it's probably going for it it's actually there's another level up from this
isn't that yeah it's not at full power yeah it's just just started holding things down
so it's since co2 in the area it was already uh obviously the fan was already working we saw it
look effective yeah okay we've got it to amber and then we've got it now on to red yeah and that is
that suggests that is now at the full setting instruction manual test yeah look at that
wow an older copy of the rigs i would imagine on the side that i'll take that off before it's uh
through the fan all the way through so because we've touched on it again
we said about the noise being generated here the actual ducting itself will help reduce that noise
this is an incredibly silent or quiet fan isn't it yeah we're shifting 151 liters of air per second
and i say in when you read up on this obviously there are in recommendations for how often air
should be changed in these current times those are quite fluid which again why a variable system
it's pretty useful because obviously regulations and recommendations can change
therefore with this system you're covered and obviously this you can set it up to match those
requirements we also like to give electricians opportunities and we think this is an opportunity
not just in this current times but obviously we talk about schools and things like that
and managing co2 shall we have a little look of how we went about actually making
some of these connections and fine tuning yeah have a look at the wiring here let's dive in
let's go through some of the assembly processes i'm going to need to get out the inline fan so
i'm going to release these straps on either end to do so okay look a little bit like cable ties
yeah so that just wiggles out and it allows you to fix it down we use this wooden board there's
four fixing screws to do so so screw that into position before returning the inline fan yeah
pop that in like so okay so the bracket itself interesting also functions as the coupling to the
ductwork system as well that's clever design they also help reduce vibration say where it's mounted
in a full ceiling you don't have to have it in any position in particular so that arrow is obviously
the direction of the airflow that doesn't have to be top dead center just depends on your circular
wiring loom where you want that positioned good so so this is the connection for the variable
speed control so this is a not 10 volt signal again just putting some feral terminations on
there and again it goes in the relevant terminals on the control side so between 0 - 10 volts
that's controlling the speed is it going yes that's it yeah so we'll get that one screwed
into position, it's going to need a supply as well in here as well as the control wire
there's that so yeah there brings that one in yeah final connection it's got a handy little cord
grip there i'll notice as well it just sort of loops in and round yeah it is yeah and again that
top you can position that in any any uh location depending on where your cable is coming from yeah
so that helps done it so you can have it whichever way around you want circular so that's good
a little rubber gasket in there to get that ip ceiling so this is our control module just wiring
the one 10 volt signal in there so with the wiring complete i take it into pairing mode now yes we've
got to pair our co2 sensor with the receiver module so when you switch on the receiver it
goes into a search mode to find the census and now the sensor we push that button there and we're now
looking for this flashing light to go permanent green that shows it linked together okay that was
simple that's already gone green what's next well you can confirm that that's definitely the case by
just uh pushing this button again here on the on the sensor we'll just get a little flash of the
red led there five times which means it's linked up you can pair up to um four um sensors with each
receiver so you might have it in different parts of the room right okay I've got bright light now
okay so this is the uh this light indicates the level of co2 so amber mid-range green low end
but that in a in a dark uh a dark environment that might be a little bit distracting you might want
to turn that down gary and you can do that on that little potentiometer that's pretty clever in it so
we're into these dip switches what's going on here yeah so this sets the the mode of operation uh for
the fan so obviously uh that's important depending on how you want the fan to operate again yeah
comprehensive instructions there and then next to that we've got this um the sensitivity of the co2
sensor so obviously that's the amount of carbon dioxide in the air and obviously the required
fan setting for that okay so again consult the instructions for that wow little detail there
look at that little metal clip okay yeah remember when you have your possibly your tyres changed on
your car okay that's the balance the fan out balance the fan get a super silent operation
so every stage over the assembly and setting up the actual pairing was simple yeah nice simple
system so what sizes they come in and what's the warranty okay we've got 150 millimeter
version here but you can also get 100 and 200 millimeter versions all with a five-year warranty
obviously is a variable speed fan if you wanted to use a conventional fan and just
switch it on and off i'd still use the co2 sensor receiver this will switch up
to three amps of conventional load all right now if this isn't your thing do check out
the video also made on the environment silent dual 100 which is more for those
domestic settings obviously you can use this in domestic settings as well but the silent jewel as
well that had some fantastic features in as well but yeah again make for high quality installation
i will also put a link in the description below for some more information about
ventilation of buildings obviously as we said this is a fluid situation changing all the time
yeah and as always we're interested in your comments have you fitted any other products
by var event that you want to tell us about that you found were fantastic and help the community
out have you fitted one of these Silent Ecowatts in the past are you thinking about fitting them
in the future we'd love to hear your comments and we'll try and get back to as many as we
can you