3 ms·
How is this significantly better than the parent comment of attaching one filter to a box fan?
by TurkishPoptart 4y ago
How is this significantly better than the parent comment of attaching one filter to a box fan?
- jefftk 4y agoIt filters much more air with a single box fan. Box fans are optimized for flow, not pressure, and reducing resistance with four or five parallel filters means the fan can move much more air through its filters.