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Having tested the DIY option versus some other air purifiers (xiaomi not levoit though), I do think that there are other considerations to take into account. A
by gommm 5y ago
Having tested the DIY option versus some other air purifiers (xiaomi not levoit though), I do think that there are other considerations to take into account. A box fan with a HEPA filter bungee is loud and is very annoying to have at home.
An air filter that is much less loud for the same result, can be controlled via home assistant (I have an ESP32 connected to a VOC sensor and a decent particle sensor that I use to control when to turn on and off the air purifier) can be worth it.
- asdff 5y agoHow much did you spend all in for your air purifier and sensor setup? Looking to do something similar but I don't know where to start.
- gommm 5y agoI'm based in HK so prices are definitely lower since I can order directly from taobao. The purifier was around 350 usd, it's the Mijia Air Purifier MAX Enhanced Edition. For the sensor, I used an ESP32 with a small eink screen (from lilygo) with a sensirion SPS30 sensor for detecting particles (see this very good teardown https://www.mistywest.com/posts/teardown-sensirion-particle-matter-sensor/ https://www.mistywest.com/posts/teardown-sensirion-particle-...), a sensirion SGP30 sensor for detecting VOCs and a BME280 to measure temperature, humidity and air pressure. I think total cost is roughly 60 usd. ESPHome makes it relatively easy, see this guide for a similar setup https://neon.ninja/2021/11/breathe-better-with-this-indoor-air-quality-sensor/ https://neon.ninja/2021/11/breathe-better-with-this-indoor-a... Hope that helps, it's a fun project to figure things out (it was my first project with ESP32).