Hi all,
In light of the upcoming bushfire danger over the next few days I figured it was timely to talk about dealing with bushfire smoke. Even if you're someone without conditions like asthma, the particulates in bushfire smoke can be quite impactful.
There's a DIY air purifier that you can usually build for a fair bit less than a typical air purifier of similar volume, it's called the Corsi-Rosenthal Box.
Just needs cardboard, masking tape, a small box fan, and four MERV-13 or MERV-11 grade air filters. The design emerged during the COVID pandemic to help filter small particulates including bacteria and viruses.
These filters can be a bit tricky to source but there's a few places around Melbourne that supply MERV-13 filters. Basically you just tape these all together to form a roughly airtight cube, with the box fan on top and use cardboard to form a fan shroud. The fan should pull air upwards through the filters.
Even accounting for Australia tax, these work out quite a bit cheaper than similar throughput commercially available air purifiers and could be a fun DIY project.
the link below has a quick guide on how to source and build the CR Box and it's already well known in filtration companies as a common enquiry type.
Posted by redmedguy
1 Comment
I bought filters online during covid that were delivered in a fairly short time. Australian distributor.
They are a bulky device when set up, but can be knocked down pretty easily by cutting the tape.