I am now the proud owner of one of @Engineer_Wong's Air Fanta 3Pro air filters.
I Purchased from Amazon UK (link below).
A quick honest overview of first impressions follows in my thread of notes, thoughts and images.
1/🧵
It was well packaged and goods well protected.
It's very lightweight.
The components are high quality, well designed & aesthetically pleasing.
It took about 2 minutes to assemble.
Takes a few moments to adjust the filters into position and seat them all correctly. 2/
The fan plate also takes a little persuasion to seat correctly over the filters but it's very simple.
Within no time you have a complete unit. Just connect the power leads together & plug into the mains.
The fan speed can be adjusted by moving the voltage dial on the power: 3/
The unit is considerably smaller than a conventional CR box.
The pleats on the filter panels are very tight giving a high filtration surface area. The metal grille to the outer sides is a nice feature.
Makes sure filters stay protected & keeps fingers away from filter media.
4/
Noise:
This is always a subjective matter and I haven't had chance yet to measure the actual dBA levels.
However, I have to be honest & say that it is loud on maximum speed. Suitable for some situations but too loud for my home office for example.
It's whisper quiet on low.
5/
The speed can easily be adjusted to find a noise level that suits however, what I'd really want to know is CADR at each voltage and I'm unsure if this info is available @Engineer_Wong?
It runs from 0 to 12.7v and I am not overly disturbed by anything up to about half-way/6V.
6/
As you'd expect, it eats PM2.5 and the outflow is very clean (see image with PM2.5 sensor on outflow) and it brought the office level down quickly; it's bouncing around 0 to 2ug/m3 after about 20 minutes. 7/
I'm very pleased with the unit, it's design, weight, portability, quality & cost.
It's a great development & I look forward to buying other products from Air Fanta as they become available here.
Having been involved in DIY filters from the early days, this is great to see.
8/
Lastly, an image to demonstrate the scale of the device. I've popped a standard roll of kitchen paper next to it (26.5cm tall) which I hope gives a good idea of dimensions without needing to grab tape measures and stuff.
Thanks for making this product Adam.
9/end
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I have made some sound measurements of the Air Fanta 3 Pro as people have requested.
Note: I have a home set-up and so these numbers will be approximate. Soft furnishings, hard surfaces, rebounding sounds etc all affect results.
But it will provide some idea.
1/🧵
Notes:
The sound is slightly rhythmic from the unit. Measurements bounce a bit. Averaged and rounded to the nearest dB.
NB: Considerable changes to pitch are noticeable even when sound pressure measurements are similar. So acceptance depends on personal sound perception.
2/
The following measurements are made using a Tadeto sound level meter SL720 from a distance of 1m (which is standard) and at 80cm height from floor with the unit placed on the floor. It is unable to measure anything below 30dBA. 3/
I'm trying to think why the different public & also public health reaction to an E. coli outbreak in shop bought foods versus the ongoing Covid pandemic.
The number of people affected is way smaller and yet it hits the headlines like below.
Most people would avoid this food.
1/🧵
Obviously, I'd avoid it too.
I'd imagine if people were offered to these sandwiches, most would refuse to eat them.
That's because they don't want to put a dangerous pathogen into their body.
I wish they would apply the same logic to covid.
Try to avoid it entering the body.
2/
What I don't see is people saying that most of the food is safe & so no need to recall it all.
I don't see anyone saying 'well it only kills a small percentage of people' - therefore it's fine.
I don't see Public Health saying make no effort to avoid it or just to wash hands.
3/
I'm sure many have seen mask bans in parts of USA.
My view is that as long as people stay silent & keep accepting high disease spread as normal, the more likely those in power will take more & more of your rights away.
Even if you feel unaffected, you must see this is wrong.
1/🧵
Think about it. Even now we have seen the most basic protections against airborne diseases removed from most healthcare settings.
Those who are clinically vulnerable etc have been left to fend for themselves.
Again, even if you feel unaffected, you must see this is wrong.
2/
There'll come a time when that person is YOU or someone you care about.
It has been left to just a few of us to fight this. We have been left exhausted by it but we fight on.
Not just for us but for everybody.
Because even if you don't see how wrong it is; you will eventually.
3/
I love the simplicity of adding ceiling fans to classrooms (for example) as one measure.
The fans disrupt plumes, knocking aerosols down creating a safer near field environment.
They'd also help with air mixing & ventilation, complimenting open windows & in-room air filters.
1/🧵
They are easy to install, easily available immediately, low cost, low power and low maintenance.
They are safe & unobtrusive & so all the daft objections we have towards in-room air filters cannot be applied so readily to ceiling fans.
Low ceilings could be one possible issue.
2/
But it's measures like this that anyone serious about cutting risk should be looking at.
Evaluate each space properly and figure out what can be done immediately at low cost to improve the situation. Low cost extractors, ceiling fans, air filters are all immediately possible.
3/
A note on masking.
I've seen quite a few folk posting that they got caught with infection despite masking. When I look back at their prior posts, I see the type of masks being used with an element of despair.
I want to try to help because it's an easy trap to get caught in.
1/🧵
So most often what I see are ear loop style masks.
People know that FFP2, FFP3, N95s are all protective standards and they are for sure...but only if they fit & seal properly.
It is rare for most ear loop style masks to fit anyone well enough that they get a good seal.
2/
Folk shop by the standard I think, seek out FFP2/3/N95 respies & assume that they'll benefit from the right level of protection - but this isn't the case unless they fit & seal.
The test to pass the standard measures the filtration efficiency with a fully sealed respirator.
3/
If respirators were used in all healthcare settings (as they should be) - there are very few downsides and plenty of benefits.
It would unquestionably be safer for staff & patients; reducing all airborne illnesses.
So what are the real reasons & obstacles?
A thread 🧵1/:
Is it that they just can't admit it's airborne still; deploy the required PPE?
A big part of it for sure. The IPC folks still can't seem to get their heads around transmission and are fixated on droplets...but dropping the need for surgical masks too means it's not 100% this.
2/
Is it that they don't think staff will comply as it's not the comfiest thing to wear on long shifts?
It could be. The lack of compliance (and uproar) from the public too is probably off-putting for those creating the rules...yet they helped manufacture the non-acceptance.
3/