Remember my Panasonic F-PJD35A?
First reviewed in 2011
And again during the haze in 2013
I'd been using the filter waay longer than recommended (2 years) because I couldn't find replacement filters for it. Panasonic has poor support for their air purifiers. Surprisingly the old filter could still reduce PM2.5 to 1, measured by my Xiaomi https://mbni.blogspot.com/2018/01/xiaomi-pm25-detector.html
Apparently it's much easier to find new filters than expected. All that seems to matter are the numbers in the model name - 35 in this case. All models using the same numbers appear to use the same filters. I bought the filter for the F-PXF35 / F-PMF35A and it fits. Size is stated as 402x217x32.
So what's the filter like?