Portable Room Cooler




Hey!  Chill Out This Summer with this tiny Room CoOoOler.

 You can make this tiny looking yet powerful evaporative room cooler with dumped items at your home.   

List of items used in this project-

1. A metallic cubical box (I used Munchini wafer box (6X6x6 inch) )
2. Cooler pad (found at hardware shop, 1 pad is sufficient for the job)
3. Wire mesh approximately 24x15 inch.
4. Fan 22W, 2700rpm, 220Vyou can even use your old computer fan)
(Available at electronic parts shop)

5. Water pump. For this you have two options-
a) Make your own pump using instructable available on the site, as I did.
b) Purchase from the market (the small one)

6. Rubber pipe (1cm in diameter and 1m long)

Few basic tools and items required-
Pliers, screwdriver, knife, hammer, M-seal, tape, super glue (fevi quick), cutter and few loose wires for fitting purposes.

Step 1: Step 1

 Take the box; make a square window (4x4inch) on 3 sides and 1 round window on front side. Use knife to cutoff metallic portion.

Step 2: Step 2

Attach fan inside the box using nuts.

Step 3: Step 3

Make 3 cooler pads by cutting out wire mash of the size of window you made.
Sandwich the pad grass with 2 mashes using some wire.
Fit the pads from inside the cooler frame using M seal and loose wires.

Step 4: Step 4

Make water connections as shown in the photos
Use an external water container and place pump inside it

Step 5: Water Proof Pump

For pump you need a water proof motor which is not easily available, So I just mounted my motor on thin iron rods.This prevents rusting
To make such type of pump follow these-
1. Take a 12v dc motor and remove the gear box if present so as to use 2400 rmp.
2.Attach a thin rod with the shaft of the motor using M-seal and fevi-quick.
3. Attach  supporting rods using M-seal.
4. Cup of the pump (main part which will go inside the water ) can be any round container of appropriate size.
5. take out the  metal sheet from pepsi mycan and use it for making blades(which will actually rotate the water inside the cup)
6. attach these 4 blades with the rod (attached to the shaft)
7.use 12-24 v dc adapter for supply.
8. pump is ready to lift..

Step 6: Done

Supply power as rated on fan and pump

Your portable cooler is ready yooo...!!



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    46 Discussions


    1 year ago on Step 6

    ITs nice idea for fun but it may not very effective as your cooler sits inside your room and keeps circulating same air which is already humid. Water cooler are effective if they are outside room, suck in dry air and pump cool and humid air in the room.

    Mrs. Trydle

    3 years ago

    You could use the motor from an aquarium filter, water proof, and it has blades on it to move the water through the filter...


    7 years ago on Step 4

    can you help me in making such a high speed water flowing pump at home i had made a small one but it's very slow please help me...

    11 replies

    Reply 7 years ago on Step 4

    but my motor is only of 9v , and what's the purpose of this pump in the portable room cooler bcoz there is no space for storing water in the cooler....
    (by the way where do you live)(i live in meerut ,you?)

    I use a plastic container to store water below the cooler , water from the cooler drops down and collected in the container and then lifted back to the pads using pump(12v)(I live in Ajmer, Rajasthan)


    Reply 4 years ago

    man there too much heat.. do u know abour peltier .. im want to cool air like airconditioner do... but there the problem to keep water cool when it flow through the pipea


    Reply 3 years ago

    in this model u dont require to cool water because water will going to cool automatically by evaporative action while falling from grass pads

    take a powerful dc motor...u can use motor from old floppy/CD drive. use pencil cell cover(metal) to make blades, curve them to giving aerodynamic shape so that water can flow more vigorously. more flow means low pressure (Bernoulli's law) resulti in high outflow of water


    Reply 4 years ago

    do you have any idea to run bldc motor used in dvd players ..??

    hello ankit ,where are u?
    i m waiting last 3-4 days.
    i forget your cell number.

    mohit mathur
    softech computer education


    4 years ago on Introduction


    I don't understand the pump part i mean installing in the cooler where is water being pumped, inside the air conditioner behind fans?

    Or is the sides cooler pad grass that is getting wet due to water please let me know

    This image is not clear so can't understand https://www.instructables.com/file/FIPIDUTGP6ZJMLW

    Thank you!


    4 years ago on Step 6

    You can buy swamp cooler, (aka evaporative cooler) pads at hardware stores. But only in arid climates, like the southwest USA. These devices don't work in humid climates, like Florida. (or online

    http://www.simsupply.com/s?defaultSearchTextValue=... )

    It is also important for the air intake to pull air from OUTSIDE the area to be cooled. EC works by passing warm dry air through wet media, picking up cool water vapor that can cool the air up to 30 degrees F if conditions are right. If you don't pull in outside air, the air in the room will eventually become humid and the EC effect will no longer work.

    This model might be able to cool a small area by your desk chair though. It is far too small to humidify an entire room.

    It would be nice to see some results of your device. Can you measure ambient humidity in the room and temperature readings at the inlet and outlet?


    7 years ago on Introduction

    Do you know, this awesome project can also be used as a car cooler...? Instead of connecting this fans wires with laptop, just connect them to car cigarette lighter....

    1 reply

    7 years ago on Step 6

    hi..... i'im computer technology student searching a instructable device. may i constuct your porject? i'm from philippines

    1 reply