Ever since we launched the Blast and Blast Mini in 2017, we’ve wanted to get good data on how long the filters last. These filters are huge, 10-20 times the size of our DIY purifier filters in fact. We’d expect them to last much longer, but let’s see what the data says. The Problem with the Numbers […]
Category: Air Pollution
How long do the Blast and Blast Mini HEPA filters really last? – Supplemental Article
Estimating Lifespan from the DIY1.0 Longevity Tests The Blast HEPA is 20 times bigger than the DIY 1.0 and it is made of the same material. Thus, is it reasonable to think that the Blast HEPA will last 20 times as long? Not really, because the Blasts push more air and clean bigger rooms, so […]
Fast-Growing India Startup Zomato Installs Smart Air Ladakh Air Purifiers
Smart Air installed 91 Ladakh purifiers (we call them the ‘Blast’ outside of India) to India’s biggest food delivery startup: Zomato. Zomato was moving into their new 100,000 square feet office in Gurugram and needed a solution to give their team clean air. Recent painting, new carpets, and remodeling work meant the Zomato […]
So You Thought Hong Kong’s Pollution Comes From the Mainland? – Supplemental Data
This article includes supplemental data for the main article “So You Thought Hong Kong’s Pollution Comes From the Mainland?” This supplemental data will show how high and low wind speeds affect the PM2.5 levels. Ultimately, this supplemental article draws the same conclusion as the main article. Does Wind Speed Affect PM2.5? What if particulate […]
So You Thought Hong Kong’s Pollution Comes from Mainland China?
Air pollution is a serious problem in Hong Kong, and Hong Kongers often complain that the worst of it comes from Mainland China. Is that fact or a convenient scapegoat? After all, Hong Kong is a densely populated developed city with one of the busiest ports in the World – it is likely that they […]
Test: Can You Turn Off Your Purifier When You Sleep?
Here’s a question I often get asked: “I don’t want to hear the fan while I sleep, so can I run my air purifier for an hour and then turn it off before sleeping?” The logic is that, since the doors and windows are closed, once we clean all the air in the room, it […]
Hong Kong’s air quality might not be as good as you think
Hong Kong doesn’t come to mind when you say the words ‘air pollution’. However, I just analyzed data on Hong Kong’s PM2.5 pollution and found that PM2.5 air quality levels averaged 30 micrograms in 2018. What does that mean for Hong Kong’s air quality? Based on this data from Berkeley Earth, Hong Kong averages three […]
How’s the Air in London? See the Data
I just analyzed data on London’s PM2.5 pollution and found that it averaged 12 micrograms in 2018. What Does That Mean? Based on this data from the King’s College London, London’s air quality is slightly above the WHO annual limit. That limit is important because research shows that even levels around 10 micrograms affect our […]
Does the Climate in Bangkok Aggravate the Air Pollution in the City?
I just analyzed Bangkok’s PM2.5 data (what is PM2.5?), and I found it varies systematically by season and time of day. Bangkok Average PM2.5 First, some basics. In 2018, Bangkok averaged 27 micrograms of PM2.5. That puts Bangkok just under three times the WHO annual limit. Bangkok’s Air Pollution: The Bad News But […]
Do Air Purifiers Remove PM2.5?
When I was coughing through Beijing’s airpocalypse and thinking about buying an air purifier, I wanted to know something first–do air purifiers really get the small particles of PM2.5? I wondered because I saw lots of air purifier tests on pollen, but pollen is generally 10 microns or larger, whereas I was really […]