Make an Air Purifier on the Cheap

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Introduction: Make an Air Purifier on the Cheap

I'm sure there are some of you out there, like myself, whose room is full of dust, allergens, and other debris.  After looking at the prices of some of the purifiers on the market, I decided to make one myself, and construct an instructable on how to recreate it.  

Step 1: What You'll Need

You will need the following parts:

A foot of 3 - inch diameter PVC tubing
A 3 - inch diameter computer fan (mine was 12V)
An AC/DC adapter, with a DC output the same as your fans
Filter for a room air conditioner
Toggle switch
Hose clamp for the 3 - inch pipe

I already had the fan and adapter laying around, but everything shouldn't cost more than 20 dollars.

You will need the following tools:

Drill and various bits
Soldering iron + solder
Hot glue gun + sticks

Step 2: Preparation

Start by drilling two small holes for the wires of the adapter, and the wires of the fan.  Make sure your holes are placed close enough to the top so that you have room to install the fan.  

Next, make one larger hole in between the two smaller ones to accommodate the toggle switch.  

Step 3: Assembly Pt. 1

Twist together, then solder the negative wires together.  

The twist and solder each of the positive wires to the prongs of the toggle switch.  (Positive on the adapter has a white stripe)


Step 4: Assembly Pt. 2

Push the toggle switch through the large hole, and screw on the anchor that comes with it.  Next, using the hot glue gun, glue the holes where the wires go into, and around the toggle switch to form an air tight seal.  Allow a couple minutes to completely cool.  

Then, place the fan on the top, make sure its centered with the air flow going AWAY from the pipe, and hot glue the corners down.   Then, form a nice tight seal around the edges of the fan and pipe.  

Step 5: Put on the Filter

The filter unfolds to a pretty large sheet.  I decided to cut a third of it off, then fold it into a square.  This made it 4 layers thick.  
Place it on top of the pipe, opposite side of the fan, and secure it with the hose clamp.   Tighten as hard as you can, then trim off the excess filter corners.  

Step 6: All Done!

Plug it in, and listen to that baby purr.  It's extremely quiet and blows pretty nicely.  Set it somewhere in your room, and let it clean your air.  I would recommend changing the filter about once a month, or when the color looks about #333333.   

This was my first instructable, so if you like, lemme know!

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26 Comments

Awesome ible. Simple and functional. I am a bit curious as to why you used the thicker walled PVC pipe as opposed to the thinner walled version. Unless you wanted to be able to drill, tap and screw into the PVC pipe ends at some point.

heys, one question.. how come the fan blows away from the pipe? shouldn't it be blowing into the pipe so the filter catches the pet dander, hair and particles?

The fan blows the cleaned air out of the pipe. It will not get clogged with dirt and dust that way. Furnaces have the filter before the motor for the same reason. If you had the fan blow in, the fan, wires, tube, etc would get dirty pretty fast.

It would probably work better the way you described.

it should work as long as you are forcing the air through the filter .

Switches are cheap, under a buck. Wire is cheap, about a buck. The tube is cheap, about a buck. The filter is probably like 5 dollars, the fan can be salvaged, and the glue gun you could already have.

it can purify dirty air or not?

if not it is just a child's play

the air purifier available in market purifies the poisonous fumes also

Wtf are you doing in your house, man..?

Cooking Crack, rat poison, or bombs :). Either way, get a professional one if you are concerned with poisonous fumes.