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Simple anti-allergen air filtration system at a fraction of the cost of commercial units. It's not pretty but it does a great job. All parts readily...
- One Cheap 20" box fan ($6-8) - One very good DISPOSABLE PLEATED 20" furnace filter (I like the 3M ones) ($8-$15) - Good quality duct tape ($2-$4) N...
Most cheap fans will be set up to push air in one direction. Likewise, most disposable pleated furnace filters are designed to handle airflow in one ...
Using the duct tape, seal the filter to the face of the fan.
Since you have added a restriction to the front of the fan, air will want to blow out the back of the fan instead of through your filter. Since the f...
Usually every month or two. Remember to use pleated disposable furnace filters.
Pushing air through a filter adds stress that the fan wasn't designed to handle. Expect to buy a new fan every year or so.
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