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 […]
Tag: PM 0.5
How Big of a Room Can the Cannon Clean?
After I tested every fan in China I could find with a flat front… …the results of one fan stood out above the rest. Because of its appearance and how much butt it kicked, I called it “the Cannon.” In Anna’s 15m2 Beijing bedroom, it crushed particulates. It removed 97% of the small .5 microns […]
Test: Do you have to run your purifier all day?
Some purifier companies recommend running your purifier all day. But is that really necessary? If so, isn’t that a big waste of your filters and energy? Test Method To get to the bottom of it, I set a Smart Air Cannon on a timer to turn on for two hours everyday in a 13.5m2 Beijing […]
Do Chinese New Year Fireworks Pollute Indoor Air?
I’ve posted data before showing that outdoor air quality is strongly correlated with indoor particle counts (r = .71), but Chinese New Year gives nerds like me a great chance to see what happens when we get a momentary shock to air quality. The media made a big deal about people cutting back on fireworks this year […]
How Safe is Indoor Air?
I recently did some research on whether indoor air is as bad as outdoor air. Before that, I had a conversation with a friend in Beijing that went something like this: Friend: I’m not sure if I can make badminton tomorrow. I have a basketball game in the day. Me: Oh man, do you play outside? […]