How to make a home-made air conditioner from a fan


I will not write about the inhabitants of cities in the European part of Russia who are languishing from the abnormal heat, because this boy is outrageous. If you personally do not belong to them, or you adore the heat and feel fine among the red-hot concrete and asphalt, then just do not read this post.

So the heat is getting to me. Not everyone can afford “real” air conditioner, and it is not only about money. The waiting list for installation of split-systems is about a month ahead, and a floor conditioner, which does not need installation, is an agrarian noisy fool, which will occupy precious space of a city’s apartment for 9-10 months a year. Fans aren’t much help, t.к. they blow the same hot air that doesn’t make you feel any better.

But, as it is known, the new. is well forgotten old thing. There is such a thing. evaporative conditioner, which due to simplicity of principle can be installed with one’s own hands. In the Internet there are descriptions of such self-made air conditioners, but the proposed designs are relatively time-consuming to make, and the modern inhabitant of a megalopolis has so little free time. And not everybody dares to drill-saw-cutting-paint in his apartment.

But there is a way out! Being a busy city dweller myself, I have invented and tested the evaporative conditioner, which can be made of shit and sticks of improvised materials in 15 minutes. From the tools will be needed:. hands. 2 pcs.;- screwdriver. 1 pc.Materials:. exhaust duct fan. 1 pc. (can be bought at any construction market);- a flexible corrugated aluminum ventilation pipe. 1 pc. (bought in the same place). wire with plug. 1 pc. (again in the same place).Total budget. several hundred wooden.

How To Turn Your Fan Into An Airconditioner AC

The fan should take the maximum performance. I found the most powerful of all household fans for 300 cubic meters.m/h, all more powerful were industrial, and therefore noticeably more expensive and noisy. Note that it must be exhaust, t.е. Blow to the side where the pipe is connected to it.

So. Bend and twist the tube a little, as shown on the photo (it perfectly bends, stretches and holds its shape). Fix the lifted end of the tube with scotch tape or self-tapping screws to a stand of some kind (I used a cardboard box from under the same fan). We connect the wire to the fan and plug the fan into the pipe.

Pour some cold water into the pipe and loosely place cotton rags in the water. When they are saturated with water, pour some more water so that the rags are just a little bit soaked. All in all I got a layer of water and rags about a third to half of the pipe cross section. Everything. Turn on!

After half an hour of work, when the water had cooled down, the temperature difference at the inlet and outlet of the tube was as much as 5 degrees. the improvised air conditioner lowered the temperature from 31 to 26 C! Pouring snow-ice scraped off the walls of the freezer over the water in the tube gave me about 1 degree more. YES.

Afterwards. It is impossible to drag the tube with water inside (it bends), that’s why it makes sense to improve the construction, fixing it on some support. You can stupidly tape everything to a suitable board, or you can think of a more elegant holder. depends on your imagination.

Yes, it is known that cold air, when it is left to itself, goes down, that is why it makes sense to direct a little bit the outlet section of a pipe upwards and not to put the construction on the floor but on a table or night table so that to cool not only your legs.

With a pipe diameter of 150 mm, the length of water-filled part of it is 450 mm and the fan is 300 cubic meters.Of course, my device is not able to cool the whole room. However, it is quite capable of creating a comfort zone around the workplace or bed. Now I sit at my computer in a pleasant coolness 🙂 How to increase the performance if you need to? It is possible to increase the length and cross section of the pipe, put a more productive fan, collect several devices in a battery. In addition, I have not yet experimented with the amount of water and rags and their material. In general, the potential for improvement is great!

How to turn a usual fan into an air conditioner

Summer has come, and with it the heat from which sometimes there is no escape. Cold drinks, cool showers and staying in the shade, only help to cool down and take a break from the scorching sun for a while. The only most effective method of escape from the heat at this time of year is air conditioner. But not everyone can afford to purchase and install it. In such a situation, the help comes with ingenuity and hands that grow from the shoulders, as well as some money and time. Here is how you can turn an ordinary fan into a great air conditioner!

To make an air conditioner with our own hands, we will need:. fan (any type). copper pipe. transparent PVC tube. plastic clamps. aquarium submersible pump capacity of 600-1000 liters per hour. Thermal box (styrofoam box)

To turn a regular fan into an air conditioner, you only need to attach a heat exchanger on the grill of the fan, which will circulate cold water, and the fan, in turn, the air flow will transfer the cold from the heat exchanger in the room.

As a heat exchanger we will use copper tube 1/4″ (6.35 mm) which is used for air conditioning systems. The length of a tube will depend on the size of your fan and the density of the coil.

Of course the denser the coil, the faster will be cooling, but do not forget that a very dense coil will obstruct the airflow, so the main thing here is not to overdo it. For a standard floor fan the length of copper tube for coil winding is 5-10m.

It is convenient to fix a copper pipe to the grating of the fan by means of plastic clamps, but as an alternative you can use a thin wire.

Cut off the ends of the clamps so that they do not spoil the appearance.

To connect the pump to the heat exchanger you can use transparent PVC tube with internal diameter of 6mm., for easy connection to the heat exchanger.

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It is possible to choose PVC pipe according to the diameter of the pump pipe, but in this case it will be necessary to wrap insulation tape on the exchanger ends and fix it with metal clamps.

As a reservoir for cold water, we will use a foam box (thermal box) or any other container (barrel, canister), which should preferably be insulated with foam.

After all pipes are connected, we put the pump and the drain hose into the thermo-box. Periodically, to keep the temperature low, throw ice cubes, ice batteries, or frozen ice flasks into the thermo-box.

As you see, it is not difficult to make an air conditioner with your own hands. Certainly, self-made conditioner will be inferior to the factory one, but nevertheless it is a worthy option to fight the heat.

For those to whom this design of air conditioner will seem complicated, we suggest to consider a variant of simpler air conditioner:

To make the simplest air conditioner, we need:

In the lid of the thermo-box, cut out two holes. One hole is cut out for the fan so that the fan doesn’t fall through. The second hole is cut right up to the diameter of the knee. This knee is necessary for direct distribution of a cold stream of air over the room.

The principle of operation of homemade conditioner is quite simple. Ice is poured into the thermobox and covered with a lid (which has a fan). The air stream from the fan will be cooled by ice, will be released through the knee, and be distributed in the room. The temperature at the outlet of the knee is below 10 degrees, and will gradually rise as the ice melts. Therefore, it is necessary to periodically drain the melt water and refill the ice.

If you do not have a thermobox, you can use a large plastic container, but in this case, the condensate will form on the outside walls, which will flow on the floor. To prevent this from happening, the plastic container must be thermally insulated with a sheet of Styrofoam.

Simple self-made air conditioner

The principle of operation of such coolers is to blow the indoor air through the objects with a negative temperature. In this capacity usually serves ice or cold accumulators, designed for special bags, used for summer food transportation.

make, home-made, conditioner
  • An old car refrigerator with insulated walls;
  • capacious plastic bottles designed for 5 liters of water and more;
  • Boxes made of cardboard or plastic with lids;
  • plastic jerrycans.

Note. Air supply is provided by any small-sized fan, such as a cooler from a computer.

This mini conditioner is also suitable for cooling a car salon, it is only necessary to connect the air blower to onboard power network correctly and to have in advance the necessary quantity of ice.

Advantages and disadvantages of design

It is noteworthy that such devices really drive a cold air stream into the room. In addition the simple conditioners are really made of improvised materials, whose price tends to zero. The maximum you will have to spend on is an axial fan, if you can’t find one in your household.

Installation and connection of the device in the car

Unfortunately, the disadvantages outweigh all the advantages of the cooler:

  • No matter how much ice you put in the chamber, it is not long enough in the heat, so you have to constantly freeze new water.
  • While you cool one room, the next room is heated by the refrigerator, where the ice is made. Plus, the power consumption increases.
  • The duration of operation of the unit in the car depends on the ice stock, taken with.
  • The air passing through the ice is partially humidified. After a while the room will be saturated with moisture and you will feel even worse than from the heat.

Advice. Overwatering can be avoided by using ice accumulators instead of ice, which do not melt and do not turn into water. And there are other appliances to control and maintain optimal moisture levels.

Conclusion. Above described conditioners, made by our hands, can be considered as workable. They can help you out in a desperate situation, but operating a cooler is quite a hassle.

Types of cold batteries

How much ice in the chamber is enough

To answer this question, let’s calculate how much cold 1 kg of ice will give off when heated from freezing temperature.6 °C to 20 °C. We use the formula for calculating the heat as a function of heat capacity.

  • Let’s calculate the cold release from melting ice: Q = 1 kg x 2.06 kJ/kg °C x (0 °C. 6 °C) =.12.36 kJ.
  • Find the reference value of energy released during ice melting. 335 kJ.
  • Let’s calculate how much cold water transfers when it heats up: Q = 1 kg x 4.187 kJ/kg °C x (0 °C. 20 °C) =.83.74 kJ.
  • Add up the results and obtain.431.1 kJ or 119.75 W.

Note. The results of calculations of cold in physics also turn out with a “minus” sign, it is logical.

Even if you freeze the ice to minus 15 degrees Celsius you will hardly get more than 150 W of cold from 1 kg. It means that to intensively cool the little room of 3 x 3 m with the heat more than 30 degrees you have to add to the home-made conditioner 1 kg of ice every 20-30 minutes and the same amount of ice should be frozen. In practice, the expense will be less if you are satisfied with a tolerable air temperature. 25-28 ° C.

DIY Cheap Homemade Air Conditioner Quick Build. RCLifeOn

How to assemble the air cooler

The mini air conditioner for the house or the car is made so:

  • In the side wall of the container cut a hole equal in size to the working cross-section of the fan.
  • Screw the cooler in with self-tapping screws or use small screws.
  • Make a second hole to let the cooled air out. Another option is to attach a corrugated plastic tube to the neck of a bottle or canister. The device is ready.

Advice. From the point of view of operation it is better to use a box with a removable lid, because it is easier to load ice or ice-accumulators.

It remains to put and connect the improvised auto air conditioner. It is possible to lead wires from cooler to cigarette lighter plug with powerful fuse. The manufacturing and wiring process is shown in detail on the

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Result of operation

The air conditioner is quite powerful, after all 6 Peltier modules are used. The entire electrical power was 360 watts, which is not insignificant. Though it is not necessary to compare it with a heat pump because of very low efficiency. But even this model is enough to cool a small room.Here are the results at the first start: the initial room temperature is 24 degrees Celsius.

After about an hour of work the temperature dropped to 20 degrees, which in my opinion, is an excellent result!

Air conditioner with his hands

During the heat wave, many people who do not have a home air conditioner start looking for options to escape the heat. Most often this “salvation” is a fan, or an absolutely useless mini-conditioners, representing a fan and a tank of water. Such conditioner not only does not cool, but on the contrary, it makes only worse, though during the first half of an hour it seems that it helped. The temperature drops by half a degree, and it becomes deceptively cool, after which the humidified air begins to heat up rapidly, and it becomes not only hot, but also stuffy.

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This thing does not help in a hot day

Today we will not repeat someone else’s mistakes, we will try to “hack”, oops, that is to collect from improvised means something, remotely resembling a device for creation of comfortable temperature in a hot day, namely self-made conditioner. And it all will cost even cheaper than the above-described useless mini conditioner from Aliexpress.

As always, to deliberately bore you, I’ll start from afar.

Being a man of older generation, I grew up in the country, where an air conditioner was a luxury and a split-system was generally perceived as something unattainable, that is why in hot summer evenings thoughts about how to improve microclimate in an apartment used to come to me many times, but they all usually were limited either by understanding that it is necessary to mount air conditioner or by a fan, on which at best one can put wet gauze, which was enough for about five minutes until this gauze dries up.

Over time, air conditioning ceased to be a luxury, opportunities presented themselves, and the thought of constructing their own air cooler faded into oblivion, but this summer it became necessary to improve the microclimate in the studio, where to put air conditioning makes no sense, and there is no place for it there.

Challenge accepted, which means, let’s start kolhozhivate.

By the way, in my experiments I usually use the cheapest possible components, some of which I try to make myself, since it’s trivial and uninteresting to just buy ready-made and install, even if it concerns the fasteners, so all my home-made projects have a certain air of carelessness and post-apocalyptic, since often the process is more important than the result. It will be so this time, so do not kick too much, but, in fact, kick as you want.

Advantages of a mini air conditioner:

  • Computer cooler. 2 pcs.
  • Large-sized plastic or cardboard box. 1 pc.
  • Branch pipes. 2 pcs.
  • Power supply (12 W). 1 pc.
  • Plastic bottles, cut in half. 2-4 pcs.

Insert the cooler into the cut out hole and secure with silicone adhesive to prevent air from escaping through the gaps. If you have chosen a plastic box for making air conditioner, you will have to sweat over the cutting out of the hole: put the cooler on top and trace it with a pen, then strictly on the marks make a hole with a knife or scissors. It will be easier if you make marks on the plastic with a thin drill bit and then begin to cut from the marks.

make, home-made, conditioner

Using long screws, screw the second cooler to the first cooler. Instead of two small coolers you can use one powerful cooler. The power of the cooler directly depends on the degree of cooling.

Remove the lid and cut a hole for the outlet pipe. The construction should be secured with silicone adhesive.

Put on the second tube which will direct the air flow. It should not be fixed with glue, otherwise you will lose the ability to twist it and direct the air. You can make two holes for a pipe, so that the air can spread around the room faster.

Put the lid on and make sure that the air coming into the box only comes out through the pipe. If small cracks will be visible, they should be sealed with silicone glue

Now it’s just a matter of taking a few ice cubes out of the freezer. Ice placed in 1,5 liter bottles will melt in an hour and a half after start of air conditioner‘s work, that is why you should try to freeze water beforehand. The more ice. the more powerful and cooler the air flow. An air conditioner works quite well without any ice, but then you will get an analogue of a fan.

If you can not find a suitable plastic box, you can make it assemble it from heavy paper. A cardboard box is not inferior to a plastic one in terms of quality, but it looks less attractive. The situation can be remedied by wrapping the old cardboard with the film. The ice that rapidly evaporates inside the box will soon render the cardboard useless, so a cardboard box will last you for one season at most. For convenience, put the ice blanks in a plastic basin, so as not to damage the cardboard unnecessarily.

You have the right to change the number of coolers or pipes, the shape of the box. The main thing that you get in the end. a convenient and practical design that can cool a small room and be a great alternative to a fan or an expensive air conditioner.


If you do not have a fan. then it is necessary to make it. So. We go where “ordinary” people will not look for fans, but they are there. Right. to the nearest auto parts store. Better domestic 😎

We unscrew the nozzle or filter from the tap to match the pipe in the store.

And buy in an auto shop:

Radiator. Anything larger than Oka’s will do (for Oka). Ask that without extra automation, otherwise you will have to kolupat. I bought a radiator 21082-1301012, the price of about 1290r. 2. Car fan on the radiator, running from 12 volts, for cars VAZ, GAZ, AZLK, IZH, ZAZ and ZIL, capacity 110 watts. Price 1190r. 3. The frame to this fan (do not forget about it!), 250р. (fan cover) 4. Set of fan mounts, radiator bolts (penny price) 5. You can buy reinforced rubber tubes on the spot that can be cut to any length. May need a large auto parts store. Choose the length on the basis of the planned location of the air conditioner and the source of cold water. The following specifications fit my location: The tube to the radiator inlet and to the radiator outlet (the thickest). a total of 1 m. length. Tubing from crane to radiator pipe and back. 3m. length (thinner). 6. Clamping kit (4 pcs.) under diameter of radiator tube. You can take a couple of clips for a small tube (which will be put on the faucet). 7. The usual blue duct tape (10p).?) 8. The cheapest sealant (~50r.) 9. Connector for power supply to the fan (15p.) 10. Any power supply for 12 volts (DC), I took from an old computer (AT form factor), 230 watts. It is convenient because it has a toggle switch, and not through the motherboard. 11. it is optionally possible to take an electric heating pump from a gazelle and a set of pipes to it with small collars (800r. 300р.) if you want to save running water. 12. 6 hours of personal concentrated time.

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Small sheet of thick plywood, wooden laths, a wood saw, bolts, nuts, self-tapping screws, a drill and wood drill bits. all this already has been in the household, and is needed to make the radiator retainer. You can be creative here. As a last resort, anything you have on hand will do, as well as rope and duct tape.

Duct tape is needed to fit the radii, because the tube from (and to) the radiator is larger in diameter than the tube from the water faucet.

Putting it all together. Place the heatsink horizontally, preliminarily plugging the hole for the temperature sensor with something. I plugged it with a self-tapping screw covered with sealant. When you connect the fan to the power supply reverse polarity (minus is connected to the plus, and vice versa) to change the direction of the fan.

This device takes the coolness from tap water, excess water can be discharged into the bathroom or washbasin. Gives you cool air. Power is not high, so it is desirable to close the extra rooms, especially the kitchen. It’s usually the worst heat generator in the apartment, the refrigerator. That’s something to consider.

Really allowed to reduce the humidity in the room and the temperature by 3 degrees. The radiator for some reason works on 50% of its surface due to air s, has not yet solved this problem.

If you also decided to use a computer power supply. know that all the yellow wires are 12 volts, all the black wires are (minus), or “ground”. The wires from the fan connection can be simply stripped, plugged into the power connector for the hard drive and taped with duct tape. Sometimes the wires fall out, I also fixed them with a small nail. But I, for some reason, worked only from the red wire (5 volts), maybe the unit is not standard.

And here is the first satisfied user of this system:

The noise is not very much. Disadvantages of the system. because of the inversion of the fan dropped its power, and unroll the design technically complicated. It also collects condensation, you can put a towel or a basin. What can be improved? Make a case, invert the fan back and turn air flow from it to %uzerneim%, get rid of air congestion in the radiator. And finally solder the wires properly.

I wish you, the reader, to meet such a summer exclusively at the sea and on vacation Feedback on improvement of the design and funny unconstructive criticism is gladly accepted in the Комментарии и мнения владельцев to this post.

UPD: If you repeat my deed, send photos to mail netAn or here in Комментарии и мнения владельцев.

UPD2: Water must be supplied to the radiator downwards and taken from the top. There is also a faucet to “drain” the air cushion. Only works effectively at maximum water flow. lowers temperature by 5 degrees! On the inlet 30.1, at the outlet 24.9 Celsius. I tried to connect the pump to save water, but not enough power supply. I’ll try to pick up a PSU more powerful and will report. I taped up the side holes of the fan frame with rubber banding to keep the windows warm in winter, it blows much more efficiently.

Unusual use of freezer

With some fantasy and skill some homeowners can make an old fridge into an air conditioner which is installed in a window opening or special alcove with the access to the street. The camera, designed to freeze food, is inserted in such a way that the back is completely outside, i.e. к. there is a radiator, which is an active source of heat. The basic cold is concentrated inside the chamber, that is why we make a hole in the door and install the fan of the necessary size.

On the sides of the chamber, which will be outside, you can drill holes for the inflow of air mass. Such a design from the refrigerator will ensure an inflow of coolness into the room during hot summer days.

It is possible to make an air conditioner from a fridge, using an old portable version of a domestic product.

  • We take the case from the mobile version of the refrigerator, which has not worked for a long time, but it keeps air tightness well, remove the lid, install two computer coolers on it. To do this, we outline the size of each, then use a drill and a mechanical jigsaw to drill round holes.
  • We put coolers on their places and close all gaps with sealant.
  • Inside the chamber we put the ice. you can freeze in advance in a plastic container, suitable in size to the internal volume of the old device, the necessary amount of.
  • We close the lid tightly and switch on fans with the help of specially got device or connect them to PC. Ice melts quite long time, and conditioner from an old mobile refrigerator, made by our hands, has time to cool the room perfectly.
  • Then the water is poured into a container, and a new portion of ice is put in its place.

As you see, to make an air conditioner with one’s own hands is quite realistic and without any special technical skills. All offered above self-made variants of air conditioners are absolutely harmless and are made of ecologically clean components, many of them help to save much not only on purchase of expensive equipment, but also on its installation.

Original designs will help you avoid heat stroke while at the cottage, and for motorists who have saved the old radiator from the furnace will suit such here is the original air conditioner, the method of making which is shown on

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