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I’m finding the SmartAir website a treasure trove of information – thanks all !!! I should qualify my earlier posting regarding the inexpensive Ikea HEPA filter. Although only around $USD7 ($10 in Australia, inclusive of our 10% Goods and Service Tax) it is somewhat skimpy – likely designed for the low levels of pollution we generally experience. I may have seen reference to 4″ thick (10cm) HEPA filters offering expansive air filtration [and possibly an improvement in the volume of air processed?] My Ikea $AUD10 HEPA H12 (99.5%) filter is 25cm wide, 39cm high, very well sealed, BUT only 2cm… Read more »
In Australia, with mains around 246V, my inexpensive Ikea DC air purifier, with just the large ($AUD10, ~$USD7) HEPA filter installed, has a specified CADR of 140m3/h from 14W – although requiring more like 17.2W from the grid (0.070A for a Power Factor ~0.8). On a medium setting this air purifier is even more efficient with a specified CADR of 90 from just 5.6W – although a poorer PF ~0.6 (0.039A) requires around 9.6W from the grid. Of interest, even though the circular slots for fan intake are relatively small, with the well sealed rectangular filter extensive use resulted in… Read more »