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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    32 Discussions

    0
    mousumi mitra
    mousumi mitra

    Question 6 months ago

    How do I demonstrate the working of this air purifier?

    0
    Rishabhiit
    Rishabhiit

    Question 1 year ago on Step 6

    Is there no use of electrostatic precipitate like original one ?
    And how much current is required to let it work?

    1
    randofo
    randofo

    Answer 1 year ago

    It does not appear to use static electricity. These fans can be run off of a 9V battery, so it presumably uses fairly little current. I would say 12V @ 0.5A or greater should work.

    1
    RebekahL15
    RebekahL15

    Question 1 year ago on Step 3

    Hi! I'm a newbie at this and want to do this with my class. I'm a bit confused on which wires are which, particularly Step 2 and 3. How does the adaptor have one wire going into the PVC pipe but have two coming out? All the adaptors I saw on Amazon has only one wire. I wish there were more pictures so I know exactly which wires and which and what is being soldered. Thanks in advance if I get any reply!

    1
    randofo
    randofo

    Answer 1 year ago

    The wire going into the PVC is actually a 2-wire cable (presumably coming from a 12V DC power supply with the end cut off). You would need to split the cable in half and strip the ends of the two separate wires. It is hard to tell in the picture above. See attached for a crude diagram of the circuit.

    IMG_6706.JPG
    0
    horeb edward
    horeb edward

    1 year ago

    please tell it can purify dirty air or pollutants?

    0
    MichaelS918
    MichaelS918

    2 years ago

    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.

    0
    EliezerC
    EliezerC

    4 years ago

    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?

    0
    ejsilver26
    ejsilver26

    Reply 2 years ago

    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.

    0
    pootislord
    pootislord

    Reply 2 years ago

    It would probably work better the way you described.

    0
    t1ber1um
    t1ber1um

    Reply 4 years ago

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

    0
    DebiprasannaB
    DebiprasannaB

    3 years ago

    How much it will cost

    0
    pootislord
    pootislord

    Reply 2 years ago

    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.

    0
    killerstrike311
    killerstrike311

    3 years ago

    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

    0
    lordloihi
    lordloihi

    Reply 3 years ago

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

    0
    pootislord
    pootislord

    Reply 2 years ago

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

    0
    KathrynR30
    KathrynR30

    3 years ago

    Great idea! Are there any other options of fans you could use where you would not have to solder anything??

    0
    pootislord
    pootislord

    Reply 2 years ago

    Sure, eletrical tape and splices, or wire nuts, hot gluing spliced wires, there's a lot of solutions, but nothing is easier than plain soldering. It's not easy, but you'll get better over time!

    0
    DaveS259
    DaveS259

    2 years ago

    What's the purpose of the tube?

    0
    majenko
    majenko

    3 years ago

    I'm wondering if something similar could be created by simply attaching a fan to a cheap engine air filter...