I taped a 20 by 20 inch honeywell fpr 9 filter to a lasko 20 inch.
Box fan furnace filter diy.
These filter fans can filter out the small particles that are common in wildfire or wood smoke.
To get started all you need are a 20 inch box fan and a 20x20x1 furnace filter merv 13 or higher.
Purchase a standard 20 box fan.
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.
That sticking a furnace hvac filter on a standard box fan produces a useful diy air purifier.
Securely fasten a merv 13 filter to the air intake side of the fan.
One easy and affordable way to make your own air cleaner at home is with a box fan and a furnace filter.
This filter will filter pollen dust mites mold spores bacteria proplet nuclei droplets from sneezing and smoke.
This project is so simple and inexpensive.
There will be a little arrow on the filter showing which way the air should flow.
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.
In 2018 i tested a popular claim.
Mine cost 20 at a local home improvement store.
20 inch box fan.
Apply gasketing to the edges of the air intake part of the fan.
Once you have your materials place the filter in front of the fan with the airflow direction.
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.