I'm in Australia and have a few air filters around the house. They're good when you live in semi-rural and have neighbours who like open fires, not to mention o

I'm in Australia and have a few air filters around the house. They're good when you live in semi-rural and have neighbours who like open fires, not to mention occasional bushfire. A couple of different sized Philips which I like for the big colour led circle; two have PM2.5 count displays. But the air filters I have that really work are two Inovaair beasts. Solid all-metal construction and big drum filters that move a huge amount of air. Had an oven mishap recently which filled the house with burnt oil smoke. One of the older Philips (a 6000 series) was soon showing well over 250ppm but was struggling to bring the numbers down. The big Inovaair had the whole downstairs clear and the Philips happily reporting single digits in about 20min.