Smart Air’s data-backed reviews of air purifiers, air quality monitors and masks provide honest, open-data reviews of popular brands like Xiaomi and Dyson. We present real-world test data on air purifiers from multiple brands, including Smart Air’s own, and compare them against each other. Learn what you should look out for when you’re buying an air purifier, how to test the effectiveness of your existing air purifier and tips here.
In recent months, the Japanese Pitta masks have seen a surge in popularity in Chinese cities like Beijing and Shanghai, as well as in India, the US and South Korea. They look sleek, but I wanted to review whether the Pitta masks actually work, and how effective is the …
Using actual air purifiers test data on is the best way to cut through the misleading marketing claims purifier companies make to try to get us to pay more money for clean air. For that reason, I’m always on the look out for good test data. Data is power. …
Every year when winter rolls around, a billion people in India are left breathing toxic, polluted air when on the streets. Be it in Delhi, Mumbai, Kolkata or Hyderabad, everyone is forced to become experts in a complicated scientific question to cope with the pollution: Do air pollution masks work? …
The IQAir Atem is a personal, portable air purifier that’s new on the scene. Recently, air-breather Vincent asked Smart Air to review the IQAir Atem, which IQAir calls “the most effective personal air purifier.” IQAir Atem Purifier Review and Test Being the data nerds that we are, we decided to …
Data and Test Details Test Methods: These tests were identical to my previously published tests, details of which can befound here, here, and here. Original Data: The original data for all 13 tests is available as an Excel file here Average Outdoor PM2.5 During Tests It’s important to note the average outdoor PM2.5 during …
2017年PM2.5全国几乎都下降的背景下，西安却上升，同时西安南部的一群科学家决定狠狠回击污染，他们想到一个非常有中国特色的办法—— 建个大家伙—— 一座塔，但当地居民怀疑，有效吗？ 2017年建塔的时候，西安的空气质量堪忧。中国整体PM2.5都在下降，西安空气污染却越来越严重。 西安成了目前中国PM2.5的“冠军”，对靠肺呼吸的人类来说可不是什么好地方，所以可能就是建雾霾塔的好时机。 过往经验 这不是中国第一次室外空气净化尝试，之前荷兰艺术家Daan Roosegaarde曾经在北京和天津建过离子净化塔，还声称两座净化塔可以净化室外空气。 然而，独立实验显示，即便以离子净化塔为中心半径10米的范围里空气都没有变干净。即使是建造团队的估计也只有在无风的时候将塔周围20米范围内的大污染颗粒物（PM10，不是PM2.5）降低20%。所以离子净化塔的艺术效应是胜过科学效应的。 西安的雾霾驱散塔只是一个噱头吗？ 有了荷兰艺术家的失败先例，就无怪西安人民对雾霾驱散塔存疑了。不过事实是西安建的塔和荷兰艺术家建的塔原理完全不同。 西安塔的工作原理是：先受点阳光照射温室，使温室内的空气温度上升，温暖的空气会从装有滤网的塔里升起被过滤以后从塔顶放出。新闻报告并未表明塔内使用的是什么类型的滤网。 那么这个塔有用吗？没有具体的数据做支持，我们只能根据已有的知识来猜测。 优势：西安塔用了和之前已经失败的空气过滤塔不同的净化方式，并且没有使用离子净化（科学解释：为什么离子净化器效率非常不好)。 劣势1: 温室在光照强烈的时候效果会比较好，可是雾霾在西安情况最坏的时候是冬天，那时候光照也最低。 劣势2: 西安塔需要使大量的空气流动来达到预期的影响。其团队声称西安塔每天可以净化一千万立方米空气。这个量非常大，不过团队在研究的影响范围在塔周围的十平方公里内。即便只考虑在最小的空气混合高度（100米），这个塔的清理量需要达到一百亿立方米的空气。按照这个比例，西安塔只清理五百分之一的空气，这还是将空气流动和新的污染物跨三排除的情况。 结论：西安塔理论上应该是有用的，但粗略的计算表明它并不能带来显著的影响。Smart Air期待看到实际运行的到的数据。 帮助回答此问题，收集独立测试数据 Smart Air的数据呆子希望实测西安塔！你住在西安吗？你拥有一个粒子测量仪吗？和我们联系吧！请发邮件到[email protected]或者[email protected]。我们期待和你一起合作进行试验，数据分析，并发布我们的测试结果。 祝你呼吸安全的空气！
Even though PM2.5 levels are falling, years of bad air pollution across China has led to many people installing air purifiers in their homes. Most of us are now breathing cleaner air at home, but what about when we are in public spaces? What’s the air like in that gym …
When a billion people in China (and quite a few expats) woke up to the severe air pollution in almost every city in China, it forced a billion people to become experts in a complicated scientific question: Do masks work? Since then, I’ve given talks with hundreds of people all around …
Tesla rolled out its “bioweapon defense mode” to lots of fanfare and media attention. Tesla went big: “Bioweapon Defense Mode is not a marketing statement, it is real. You can literally survive a military grade bio attack by sitting in your car.” Elon’s telling the truth, but not the whole truth. …
A few months ago, Smart Air tested the Laser Egg, the Node, and the Dylos against official PM2.5 readings. The results were way better than I expected! All three machines correlated r = .90 or higher with the gold-standard numbers, which is very high. But this test may have exaggerated its …
