@Ikat0 @JMFischer @DavidElfstrom @Poppendieck @BlueairUS I saw another one in the past few days that looked easier to construct. It used two pressembled 3-fan units and two filters, plus cardboard on the top and bottom. I can't find it now though. You'd still have to do a bit of wiring, but not much.
@Ikat0 @JMFischer @DavidElfstrom @Poppendieck @BlueairUS 我在过去几天看到另一个看起来更容易构建的。它使用了两个压制的 3 风扇单元和两个过滤器，以及顶部和底部的纸板。不过我现在找不到了。你仍然需要做一些接线，但不多。