I think I should probably clarify this upfront: AirFanta has never received a single cent in government subsidies, has no business dealings with the military, and our devices contain no communication modules—so they won't steal your data. This is sarcasm, by the way.

The business logic is this: for a product like an air purifier—where interpreting performance metrics requires some math skills—charging a higher price and pouring a large budget into influencer marketing seems to work. AirFanta, by contrast, prices its products with relatively low margins, so it simply can't meet the demands of most influencers on the market. We have no choice but to rely on honest reviewers—like HouseFresh—and on organic, user-driven recommendations on platforms such as Twitter, Facebook, and Reddit.

We have about three month stock in the US. So there is still time for me to solve it.

Elon Musk believes that whether a country has been colonized is the only variable determining how well it develops. Geographical conditions, population, natural resources, education levels, and historical or cultural differences do not exist — only whether it has been colonized decides a country's development. And obviously, that is not true. I wonder whether his thinking is really that shallow, or whether he simply becomes like this whenever colonialism is brought up.

Recently, we have encountered issues when importing our air purifiers into the United States. Replacement filters are not affected. Specifically: Some air purifiers contain ultraviolet (UV) lamps and provide active disinfection functions. Under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) , such products are classified as "pesticide devices" and are subject to regulation, requiring an EPA certificate for customs clearance. Our air purifiers are purely physical products. They only trap dust, bacteria, and viruses on a filter and then allow them to inactive naturally — with no active disinfection function. Therefore, our products should not be classified as pesticide devices and do not require an EPA certificate. However, because it is difficult to distinguish our products from those that do provide active disinfection — based on appearance or general product descriptions — customs may still detain our shipments for inspection. Such detention results in additional costs, extended clearance times, and delays for other goods in the same container. As a result, our customs broker and others that we contacted have refused to handle this business to avoid trouble, even if I register the EPA certificate. I am currently actively looking for a solution to this challenge.

I have another Prototype of the air quality monitor 3. Please ignore how the current print looks — the actual product will look much better than this. At this point, the design is basically complete. The readings from all sensors are very accurate. I placed the monitor at the outlet of my simple HVAC system, and it showed a CO₂ level of 440 ppm (actual atmospheric level should be around 438ppm), particle count at 0, and formaldehyde and VOCs near 0. The next steps are to open the molds and order the various components. I estimate it will take another six months before it can be launched on the market.

How do you like this car air purifier design?

Recently, I've received several emails requesting H13 or even higher-grade filters. I would still like to explain here why H13 and higher-grade filters are not a good choice for air purifiers. A good air purifier's primary goal is to clean the air in a room as quickly as possible. There is a specific metric to describe this: CADR (Clean Air Delivery Rate). The higher the CADR, the faster the purifier captures airborne particles on the filter. Achieving a high CADR requires two conditions: High filtration efficiency – the filter should capture a high percentage of particles that pass through it. Large airflow volume – a large amount of air should flow through the filter per unit of time. If the airflow is large but the filtration efficiency is low, only a few particles are captured each pass. Conversely, if the efficiency is high but the airflow is small, the total number of captured particles is also low. But these two factors contradict each other. With the same fan, using a higher-grade filter improves efficiency, but it also increases resistance, which reduces the airflow. So a higher-grade filter is not always better. Filters like H13 or H14 commonly found on the market have very high resistance, significantly reducing airflow and thereby lowering CADR — meaning slower purification. After extensive testing, I found that the E11 filter offers the best balance. With about 95% filtration efficiency, its airflow loss is minimal, resulting in the highest overall CADR and thus the fastest cleaning speed.

If you want to know how many Chinese wear masks, this is a perfect clip.

Trump is about to arrive here. According to rumors, the cooperation between the two sides may include allowing Chinese auto companies to invest in building factories in the United States to produce a new generation of electric vehicles. I really hope this can come true. I own an electric vehicle myself, and whether in terms of cost, driving experience, or environmental friendliness, an EV is simply unmatched by any internal combustion engine vehicle. Electric vehicles can significantly reduce carbon dioxide emissions and help mitigate the greenhouse effect. China and the United States, as the world's two largest economies, actually have enormous potential for cooperation—potential that can benefit both countries and all of humanity. The only thing we need to set aside is the prejudice born of geopolitics.

Physical measures that can protect against COVID-19, including masks, air purifiers, and ultraviolet sterilizers, can also protect against the hantavirus. This is different from biological protection measures, such as vaccines. Therefore, the most effective way to deal with a new virus is still physical protection.

This is the air quality in my office. And meanwhile, outside the PM2.5 is 40 micron gram per cubic meter.

Just me and my #Airfanta on a Friday Night traveling.

It is too way late to change the filter.

Traveling with my AirFanta 3Pro air cleaner and the difference is real—PM2.5 and PM10 levels in my short-term rentals drop significantly after running it. Sharing before/after readings 📉 @Engineer_Wong

The replacement filters are now in stock on our website for European customers. I sincerely apologize for the long wait. That said, the shipping and receiving process for this batch took 3.5 months, which is far longer than it should have been.

I would like to discuss the follow-up plans for the project with everyone. After AirFanta Wear, I’ve been thinking about a laminar flow device that can be clipped onto a cap. This way, when you turn your head, the air outlet moves with your head, ensuring better coverage accuracy. The challenge would be the unbalanced weight on one side. However, I’ve been slow to move forward with this project because the application of laminar flow devices is quite narrow — apart from Covid-cautious people, very few would buy it. Sales of AirFanta Wear have been poor. We haven’t even sold out our first batch yet, and the cash flow for this project remains significantly negative. Developing another new product would likely result in losses. As a small company, it’s quite tough for me. I want to wait until after the AirFanta 5 Pro(updated edition of 3Pro) launches to see how sales perform and whether cash flow improves. That home-use air purifier has a much broader audience and is likely to sell much better. I appreciate if you can help recommend our products.

You may have noticed that Chinese people like to drink hot water. But this isn't a very old tradition — it's less than a hundred years old. In the past, water was often a source of disease transmission. High levels of E. coli were considered mild; the more serious threats were dysentery, cholera, and hepatitis. In the 1950s, the government launched the 'Patriotic Health Campaign,' promoting the practice of boiling water for a few minutes before drinking. When I was a child, I had to bring a thermos of boiled (then cooled) water to school every day. With technological advances, most households now have reverse osmosis water purifiers, yet people still keep the habit of drinking hot water. Unfortunately, it's impossible for the government to organize a nationwide campaign to develop the habit of purifying the air. China has moved past that stage where one order could mobilize the entire population. Society has become extremely diverse. Just like the things you could easily do when you were twenty — you can no longer do them at forty.

Now we have 3Pro stocked in a third party warehouse in Sidney, Australia. If you are in Australia, you can order it from our website air-fanta.com in a normal price.