Perfect for making a DIY air filter, because the power cord comes out in the bottom, not in the middle of the back, like with some other box fans. I duct taped one of the&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Accumulair-reg-Gold-20x20x1-19-75x19-75-MERV-8-Air-Filter-Furnace-Filters-4-Pack/dp/B000NNHK8E/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Accumulair&reg; Gold 20x20x1 (19.75x19.75) MERV 8 Air Filter/Furnace Filters (4 Pack)</a>&nbsp;to the intake side, and I run it when I'm gone during the day. Works great to keep dust from accumulating in my room.