Project on Air Purifiers for Allergies - Free Final Year Project's

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Mar 1, 2023

Project on Air Purifiers for Allergies

Air purifiers are devices designed to improve indoor air quality by removing contaminants from the air. They are particularly useful for people who suffer from allergies, as allergens such as dust, pollen, and pet dander can trigger allergic reactions. 

In this project, we will be building an air purifier specifically designed to remove allergens from the air.

Project on Air Purifiers for Allergies

Why it is used

Allergens can cause a range of symptoms, including sneezing, coughing, runny nose, itchy eyes, and skin rashes. For people with allergies, these symptoms can be disruptive and make it difficult to carry out daily activities. Air purifiers can help to alleviate these symptoms by removing allergens from the air, creating a cleaner and healthier indoor environment.

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Working principle of Air Purifier

Air purifiers work by using various methods to capture and remove particles from the air. One common method is through the use of a HEPA (High-Efficiency Particulate Air) filter. HEPA filters are designed to capture particles as small as 0.3 microns, which includes many allergens such as dust, pollen, and pet dander

The air is drawn into the purifier through a fan, and as it passes through the filter, the particles are trapped and the clean air is released back into the room. Some air purifiers also use additional technologies such as activated carbon filters or UV-C light to further remove impurities from the air.

Components used in Air Purifier

To build our air purifier, we will need the following components:

HEPA filter
Activated carbon filter (optional)
UV-C light (optional)
Power supply

How to create Air Purifier circuit

The circuit for our air purifier will be relatively simple, consisting of a power supply and a fan. If we choose to include additional features such as an activated carbon filter or UV-C light, we will need to incorporate these into the circuit as well. Here's a basic circuit diagram for our air purifier:

To create the circuit, we will need to connect the power supply to the fan, ensuring that the voltage and current rating of the power supply are appropriate for the fan we are using. We can also add a switch to the circuit to turn the air purifier on and off.

Building the air purifier

To build the air purifier, we will first need to choose an appropriate enclosure to house the components. We can use a plastic container or box, or even build our own enclosure out of wood or metal.

Once we have our enclosure, we can mount the fan inside using screws or brackets, and attach the HEPA filter to the intake side of the fan. If we are using an activated carbon filter or UV-C light, we can mount these components in the appropriate location within the enclosure.

Finally, we can connect the circuit we created earlier, ensuring that all the components are securely connected and the wiring is tidy and organized. We may also want to add some additional features such as a filter replacement indicator or a timer to control the air purifier's operation.


In conclusion, air purifiers can be an effective tool for reducing exposure to allergens and improving indoor air quality. By building our own air purifier using a HEPA filter and a fan, we can create a cost-effective solution to allergy symptoms that is tailored to our specific needs. 

With additional features such as activated carbon filters and UV-C lights, we can further customize our air purifier to maximize its effectiveness.


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