Forest fire smoke alternative air filter

Forest fire smoke alternative air filter,
I bought this a couple months ago and been using it for 2 to 3 weeks seems to work pretty well and the air filter surface is more than most household air filters, I keep the setting about in the middle and I’m still able to watch TV in the same room as I am, what I like about it that it’ll go down to 1 Watt all the way up to 37 Watts, Going off my kilowatt meter,
I hope this helps anybody for looking for alternative I just did not care for the box fan and duck taping a 20 x 20 filter on the back,
Was worried as the filter starts to get plugged that the box fan motor might heat up since it’s not designed for that. And the box fan is not very efficient and it’s louder. Good luck