What To Know Before Buying an Air Purifier – 2022 Guide

You can take precautions outdoors and save yourself from pollutant air, but the evil might be hiding at your place. Indoor air is reported to be more pollutant and dangerous than outdoor air. The reason is that the air inside your house is trapped in one place; it circulates, accumulating dirt particles, and debris.

Moreover, in this covid pandemic where everyone is stuck at home. The more people at home means more activities which cause more pollution in the air. Because of covid conditions and bad air quality in winter, air purifiers are necessary for today’s age.

Having an air purifier is a must to clean the air inside your house and keep you healthy and safe. That is why buy yourself a quality air purifier. There are some features that you need to keep in your mind before buying a purifier to ensure that you get the best product for your home. So let’s cut to the chase.

What To Know Before Buying An Air Purifier

Before buying an air purifier, you have to understand the functioning of the purifier and the elements used in them. How can the area of a room affect purifier performance and your health condition are a point of attention too. You need to study beforehand so that you choose a good and effective product for yourself.

1. Filters

The air purifier uses a variety of filters. You will see tons of purifiers in the market with different filters which serve different functions. If you are buying an air purifier for the first time, you might be unaware of the filters used in an air purifier. But don’t worry, that’s why we are here to guide you.


The first and most common part of an air purifier is a pre-filter which collects and traps large particles from the air & it should be replaced regularly if you want better sleep at night. Large particles like dirt, insects, fibers, pollen, pet hair get removed at this stage before further filtration. If you live in a construction area, prefer buying an air purifier with a quality pre-filter and change it regularly.


HEPA is a widely used filter in an air purifier. It stands for High-Efficiency, Particulate Air; it filters out 99.9% dust, pollen, fur, animal pollutants, odor, and other allergens from the air. The HEPA filter is claimed to be able to remove the smallest particles from the air. Even as small as 0.3 microns and more. This filter is best for people with allergies and asthma. Prefer buying an air-purifier which has the best quality HEPA filter used in it. If you are sensitive to allergens or live in a metropolitan area with a lot of pollution, this one will help you a lot.

Activated Carbon Filters

In purifiers, activated carbon filters are used in combination with HEPA filters. The porous nature of carbon can catch and filter gases, smoke, and chemicals. The HEPA filter can not absorb gases that much but carbon filters are best in this regard. It also absorbs odor and food smell from the air, so you do not feel any smell around your house.

UV Filter

UV filters are meant to kill bacteria; it makes the air sterile so you can breathe air free of bacterias and germs. However, these filters do not catch any dirt or other pollutants. Purifiers with UV filters are used in hospitals, labs, and daycare. Some scientists say that these filters contribute to ozone depletion and can be dangerous over prolonged use. Hence, it is recommended not to go for a purifier with this filter for your daily use.

CADR Ratings

The second important thing you need to check before buying an air purifier is its CADR ratings. CADR stands for Clean Air Delivery Rate. It tells you about the purifier’s ability to clean air. CADR ratings mean how efficient a purifier is to remove particles and smoke from the air. Choose a purifier with higher CADR ratings.

2. Room Size

Choose a purifier according to your room or area of your house. A mini purifier with a bad quality filter and low CADR ratings will never work for a bigger room. Check the CADR rating in this aspect and then decide. For bigger spaces, choose a purifier with higher CADR ratings. Moreover, a purifier with lower CADR ratings can work for small bedrooms as well.

3. Look At Decibels

Check the decibels value of the purifier on its packaging before buying it. A purifier with loud noise might clean the air, which will disturb your sleep. That is why we must check the noise-producing level of the purifier, especially when buying it for our bedroom. For your bedroom, the decibel level should be below 50dB.

4. Portability And Energy Consumption

You should examine the purifier’s portability too. It should be lightweight so that you can easily move it in your house from one place to another. Also, check the energy consumption level of the purifier so that it doesn’t get too heavy on your pocket.


What are the benefits of an air purifier?

The air purifier has endless benefits, especially if we consider covid situations nowadays. First of all, it assures you good health by removing all pollutants, dust, and particles from the air so that you take in fresh and clean air. It removes odor from your house. With clean air surrounding you, you get better and sound sleepy. It also removes harmful chemicals and smoke from your surroundings.

Do I need an air purifier for each room?

Buying a purifier for each room can be costly. With modern purifiers, they are quite portable; you can easily move it over from one room to another. However, make sure you invest your money on one but the best quality product which lasts longer and works effectively.

Wrapping It Up

In short, the market is flooded with varieties of air purifiers, but you should not buy anything without your research. In this article, we have listed all essential things you should know before buying an air purifier. Must check the type of filters, CADR, noise level, energy consumption level, and portability of the purifier to get your hands on the best purifier.