Once you have your materials place the filter in front of the fan with the airflow direction.
Box fan furnace filter diy.
Insofar as filter changing costs you will find that it is still much cheaper to buy furnace filters and variants of them without sacrificing on quality or air cleaning capacity.
These can be hard to find quickly with the conditions however.
I taped a 20 by 20 inch honeywell fpr 9 filter to a lasko 20 inch.
Purchase a standard 20 box fan.
This filter will filter pollen dust mites mold spores bacteria proplet nuclei droplets from sneezing and smoke.
That sticking a furnace hvac filter on a standard box fan produces a useful diy air purifier.
But a quick solution as posted by the university of michigan s medical center is to create your own filter using a box fan and a standard hepa filter both readily available in most hardware stores and costing about 25 for everything.
Securely fasten a merv 13 filter to the air intake side of the fan.
Apply gasketing to the edges of the air intake part of the fan.
Your total cost for a diy box fan filter can be as low as 40 50 00 including incidentals like duct tape or higher depending on the filter options.
20 inch box fan.
One easy and affordable way to make your own air cleaner at home is with a box fan and a furnace filter.
This project is so simple and inexpensive.
To get started all you need are a 20 inch box fan and a 20x20x1 furnace filter merv 13 or higher.
20 by 20 by 1 merv 13 furnace filter.
Particle pollution can lead to a number of immediate and long term health impacts such as trouble breathing asthma attacks and lung and heart disease.
Mine cost 20 at a local home improvement store.