rustychris
Re:Build a do-it-yourself home air purifier for about $25
on Wednesday November 14, 2018 @09:29PM (#18456382)
It works - we measured 25 down to 5 ug/m3 drop over 2 hours in an oakland townhouse. Measured with hobby grade (pms5003 from adafruit) hardware, so absolute numbers probably not that accurate, but the effect was clear.
Re:Build a do-it-yourself home air purifier for about $25
on Wednesday November 14, 2018 @02:45PM (#18453178)
In case you're curious how this does with wildfire smoke -- Oakland 1 bedroom, put a 14"x20" MERV 13 (filtrete blue) filter on a box fan (covering the extra 6" with paper). Had a PMS5003 from adafruit monitoring before and after. In the span of 3 hours indoor PM2.5 dropped from 25 to 5 ug/m3 and has stayed low since.