Introduction: Air Purifier! - the "Window Fan" Air Filtration System! - Easy DIY (w/box Fan Conversion!)

Picture of Air Purifier! - the "Window Fan" Air Filtration System! - Easy DIY (w/box Fan Conversion!)

in this instructable i'll show you how convert a window fan into an air filtering window fan

Step 1: Watch the Instructional Video...

Step 2: Read the Description...

Homemade Air Filter! The "Window Fan" Air Filter! Easy DIY. Purifies large volume of outdoor air (for lots of clean/fresh indoor air). Made with a Flanders cut-to-fit "Natural Aire" low-resistance/high velocity air filter, a window fan and zip ties. air filter i used filters out dust/lint/dust mite debris/pollen and mold. cost $5. chose type of filter to suit your needs (smoke, smog, pollen, mold removal etc...). studies show these types of air filter/fan setups work as well (or better) than much more expensive commercially available units. lastly, the filter i used is rated to be 2x better than similar polyester filters and lasts up to a year (versus only 30 days for many)

Step 3: First, Gather the Materials...

1.) one (or more) window fans

2.) a cut-to-fit air filter (choose the type that best suits what you want to filter)

3.) zip ties

4.) only tool needed: scissors

Step 4: The Build... Start by Measuring Your Fan...

Picture of The Build... Start by Measuring Your Fan...

first measure the fan. then cut the air filter to match. i used a 20" by 30" (cut-to-fit) air filter. the cut was roughly 10" by 20". (that left a 20 by 20 piece - which was perfect for another air filter project. i'll show that near the end)

Step 5: Then, Place on Back of Fan and Connect With Zip Ties...

Picture of Then, Place on Back of Fan and Connect With Zip Ties...

i connected the filter at the corners with the zip ties. make sure that the zip ties are nowhere near the fan blades. you can see it lays nice and flat

Step 6: Then Just Place the Fan in a Window...

Picture of Then Just Place the Fan in a Window...

place the fan in the window as you would normally do. as you can see in the above pictures, i have the side sliding windows, so put something to block the dirty air from entering above the fan. i used the leftover piece of air filter, but you could also use plywood, plexi-glas or even cardboard.

Step 7: Here's a Close Up of the Filter...

Picture of Here's a Close Up of the Filter...

Step 8: Here's the Test... to Make Sure It Would Fit in Window

Picture of Here's the Test... to Make Sure It Would Fit in Window

it fit perfectly

Step 9: Here's the Bonus Air Filter...

Picture of Here's the Bonus Air Filter...

this is the piece that was left. it fits perfect on the back of a 20 inch box fan. it's a low resistance, high velocity air filter, so there is no "drag" on the fan. they work great on box fans too!

Step 10: Have Fun Building and Using It!

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Bio: hi there. on this instructable channel i'll be covering all types of DIY solar power projects (as well as off-grid/survival/green living projects ... More »
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