I'm glad you took the time to check out our videos, it’s what gets us out of bed every day!

Glad you liked them - We love talking clean air!

You're very welcomed :) we love to talk clean air!

Are there any topics we should cover on our channel?

Keeping everyone update with clean air knowledge is what we do! Your appreciation keeps us going everyday. Thank you too, Sherif!

@@SmartAirFilters You are most welcome brother and please keep it up and let people understand how much the negative things we do to make high pollution is very dangerous for our health later ❤️

Hi Skeeter, That's a great question! At Smart air we haven't run tests like yours, so I can't say for certain why this would happen, but I do know that the Purple Air sensor has two readings, one which should be used for indoor air measuring and one for outdoor air measuring. The Purple Air FAQ has a lot of tips on this. They also recommend you do not use a metal screen due to airflow reasons. Take a look here: www2.purpleair.com/community/faq Breathe safe!

One possible reason why PM 2.5 readings fall when directed through a metal screen door is that the metal screen may act as an electrostatic filter that attracts and captures some of the particles.

Great idea, Bubbly! Will get into that! :)

Hi! I guess you don't have our brand air purifier? Let me know what brand and model you have 💨 In an ideal scenario, PM2.5 should be 0 - scientists confirm that even minimal amounts of PM2.5 are harmful.

Hey there! Air conditioners don't bring in dirty air from outside. Here are our three points of evidence: 1. If you look around your air conditioner, you’ll probably discover that it works like mine: it brings air from the top, runs it over the cooling coils, and blows it out the front. It’s recycling indoor air, not bringing in outdoor air. 2. I’ve held my particle counter up into the air coming out of my AC unit, and it’s no different from the ambient room air. I’ve also compared that air to outside air on very dirty days, and the air coming out of the AC is nowhere near as dirty as outside air. 3. Tests of the ambient room air before and after turning the AC on: AC makes basically no difference. Read more of our test in detail here: smartairfilters.com/en/blog/does-the-air-conditioner-bring-in-dirty-air-from-outside-update/

Hey, let us know what exactly your air quality monitor is reading (e.g. is it PM2.5 or something else). We'll explain everything in the comments. And of course thank you for your comment, we will try to prepare a video on this topic 😊

@@SmartAirFilters Thank you for the reply. It’s reading PM2.5. It’s a BYD seal driven in Europe. When I got the car in February, it was the first time I encountered the topic of PM2.5.

@@MosesKaldor here is a link where the health consequences of a particular PM2.5 level are explained: www.researchgate.net/figure/PM25-levels-source-wwwepagov_fig5_353328349. PM2.5 of 10 is considered fairly clean air. 130 is dangerous to health. However, it is worth knowing that even 'Short-term exposure to high levels of air pollution kills 1 million people worldwide each year.' Short-term exposure means even a few hours or even a few days. At level 130, it is a good idea to wear a mask and use an air purifier with a HEPA filter 🍃 We have many articles on air quality on our website: smartairfilters.com/en/articles/ 🧑‍🎓 Nice to hear you've taken an interest in the air quality you breathe 😊

And of course, let us know if we have written everything clearly and if you have any additional questions or doubts 😊

I think the issue is, how do we re-clean the air in the house to low levels of pollution? It depends on some factors, what kind of air purifier you have, how big the rooms are, ventilation systems, and windows ;). There are articles on our website that help with calculations 😃

The material of the cloth masks is an important factor in this case! From our research, we found out that 100% cotton shirts are quite effective in filtering out 69% 1-micron particles (PM2.5 is 2.5 micrometers) . If we were to compare it to silk material, silk is only able to capture 58% of 1-micron particles. But ultimately, surgical masks is still one of the more effective ones at 97% efficiency!

Wrong. An O² molecule is 0.292 nanometer in diameter - nearly ten-thousand times smaller than a PM2.5 particle (2.5 micrometer).

Great stuff, I'd love to see that study! Do you have a copy of it. Power to open data 💪

I absolutely can attest to that, sleep apnea, anxiety, allergic reactions, COPD, Blepharitis in my eyes all from wood smoke coming into our house from neighbours wood stoves.

The World Health Organization (WHO) has given some advice on safe levels of PM2.5 in the air. Here's the breakdown: - Over a whole year, it's best to have less than 5 micrograms of PM2.5 in one cubic meter of air. - On any given day, the average should be below 15 micrograms per cubic meter. - In just one hour, it's better to stay below 50 micrograms per cubic meter. Even though these levels might sound low, it's important to know that even a bit of PM2.5 can be bad for your health. So, it's a good idea to pay attention to the air quality and take steps to keep it clean for a healthier life.

@@SmartAirFilters Thank you so much 👍🏼

Amazing to hear that. Which one did you choose?

@@SmartAirFilters I got the pm2.5 with charcoal air filter, no regret, now I don't get headache and itchy eyes every time I turn on my car AC. 👍

Viruses can actually be a type of PM2.5 as they are really small in size! The coronavirus for example are 25 times smaller than a PM2.5 particle.

Hey there! PurpleAir PA-I and PurpleAir PA-II are one of the three highest performing air quality monitors and are under $250. This test is done by The South Coast AQMD (Check full details here: smartairfilters.com/en/blog/expensive-air-quality-monitors-less-accurate-than-cheaper-competition/) Shop links: PurpleAir PA-I: www2.purpleair.com/collections/air-quality-sensors/products/purpleair-pa-ii-sd PurpleAir PA-II: www2.purpleair.com/collections/air-quality-sensors/products/purpleair-pa-ii Expensive air purifiers doesn't mean they're the most effective in the market! You can breathe clean air at a cheaper price! Check out Smart Air air purifiers for home, office, church, hospitals, and travel! smartairfilters.com/en/shop/ Breathe safe!

Great point, in the UK and many other countries where wood is used for heating, it can still be a considerable source of PM2.5. The video talked in general about burning, but we'll add a note to do one one on wood burning at some point!

@@SmartAirFilters Thanks very much. The UK government released 2021 emission figures only the other day, with PM2.5 for wood burning at 21% and traffic at 13%. A video on wood burning would be great. I'll look out for it. Ta.

They make electrostatic precipitators for wood stoves and boilers that significantly reduce PM2.5 with very little power consumption and almost no pressure drop.

@@gregorymalchuk272 Do the electrostatic precipitators filter ultrafine particles, which are double the amount from eco-stoves compared to open fires? And is anyone going to fit them, when there is no regulation to do so?

😄😄😄 That's Paddy's teapot, he was drinking green tea at the time of filming!

Distressing?

Yes. It's unnecessary. He's providing useful information. Why make it distracting by adding music? It's additional useless info overload to those that are sensitive, who's brains are wired to process information slowly. What does the speaker want us to listen to? His info, or the irritating music? The sad part is that every other youtuber does that, and it's annoying, completely off-putting. It could be easily-avoidable if only they have awareness.

Think of when you're frying an egg or cooking bacon - smoke can often rise up from the pan. This is PM2.5! It's also why some houses have extractor fans over the cooker. In fact, some tests we've seen have shown that toasting bread can release PM2.5 - the act of heading up the bread essentially 'burns' it, so just like a fire it will release smoke.

@@SmartAirFilters Ah, good that I am vegan :)

​@@2Guetta not a specifically vegan problem, anything that smokes creates 2.5

Yes, residential wood burning can be a significant contributor to PM2.5 levels!

Cars, cars, cars, cars, wood cutting, factory, we burn wood since beggining of humans

In the UK Woodburning is a bigger source of PM2.5 than all the cars in the UK. yes we've been burning wood since the beginning of humans and it's also been damaging and killing us since we started using it as can be seen from the amount of woodsmoke illnesses and deaths in the global south where they still use wood to cook and heat their homes. @@tom6069

Hey! Thanks for the feedback. Let us know if the recent videos don't have too loud sound in the background

We hope that one day every hospital will be equipped with an air purifier that will take care of not only patients but also doctors and the entire team of people working there 👏