AI6YR BenTrying to deal with wildfire smoke? Here's the best thing since sliced bread for massively improving the air quality in your room/apartment/house/etc.
How to build your own Corsi-Rosenthal Box
Ray McCarthy@ai6yr
About €67 for a pack of 2x MPR-1900 filters here in Ireland.
An existing large desk fan could be dismembered. I have 35 yo one here that's rarely used as it's hardly hot enough ever*.
Addition material via free supermarket corrugated card packing from Aldi or Lidl. They often have cheap 3M duck/duct tape too.
[* If really hot** we keep all blinds & window closed (all double glazed) during the day & open some for a draft well after dark]
[** Worst was +30 °C for a few days, 21°C hot!]