The gist of this post is that ‘better’ isn’t necessary; any will suffice. So long as there’s airflow traveling through the filter pleats, your air will get clea

The gist of this post is that ‘better’ isn’t necessary; any will suffice. So long as there’s airflow traveling through the filter pleats, your air will get cleaned. If you’re in a wildfire scenario, you should — if you can afford to and can still find and purchase the parts — absolutely go the extra mile, because you need to maintain a filtration level sufficient to overcome the particulates brought in with outdoor air. Regardless, any time you have a box fan, just tying a filter to it will clean your air as effectively — but not as rapidly — as a commercial filter, under typical home scenarios.