Electricity – are these fans a danger with the filters attached? A Electricity – are these fans a danger with the filters attached? Permalink Click here to go back to all FAQ’s.No:Measured by Underwriter’s Laboratories, Inc.Smart Air has been doing the same thing since 2013 – only 5 had issues, most likely issues with the fan motor itself, not the load. There were no actual fires. Did you find this FAQ helpful? 2 2 Share facebook twitter linkedin pinterest email Back to Top previousoldWhy should it be pointed up at the ceiling? I saw a study that said pointed down is better.nextElectricity – how much does it use?