This document covers five of the most common DIY air cleaner designs, which are referred to as the 11 (one filter, one fan), 21 (two filters, one fan), 41 (four filters, one fan), 51 (five filters, one fan), and 32 (three filters, two fans) designs throughout ( Figure 1)
For, amid the sweet-scented fog and existential haze, one simple truth emerges: share or beware, chiefshare or beware
We are only considering Class 8 heavy-duty trucks in this analysis as these are often the most difficult vehicles to electrify due to their large size
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