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How to Buy the Best Air Purifier?

Written by Shikha Mehta

Are you looking for an air purifier to breathe fresher air? With an increase in the level of pollution, it has become essential to purify the air we breathe to minimize lung problems. Here’s a guide for you to find the best air purifier for your room.

A good air purifier cleanses all pollutants present in the atmosphere. It also removes bad smell from the room in which you install it. Now if you want an effective one, you first need to understand how an air purifier works.

How Does an Air Purifier Work?

The purifier traps the polluting particles present in the air. The device then gives out fresh air that is healthier for you to inhale.


So how does it manage to do both? Let’s check it out step by step.

• The air present in the room is sucked in by the fan of the purifier.

• The device has got a filter or multiple filters present in it. When air passes through it, dust, dirt, pollen, germs and odor present in it will get stuck at these filters.

• The fan of the purifier then circulates fresh air in the room.

Looks easy right? Well, it is. Only, not all filters can filter everything present in the air. To filter large particles and clean the air, filters like cloth, mesh or water are useful. To kill germs, UV radiation is required.

So, let’s see what this device can really do to benefit you.

Advantages of an Air Purifier

  • Reduces the Chances of Getting Lung Infections and Problems: Problems such as asthma, lung cancer, and other lung-related problems are reduced by the presence of air purifiers. Your lungs are the most affected by particles of smoke, dust, perfumes, cosmetics, carbon monoxide and radon gas. All these are filtered by the purifiers so that you breathe in pure and clean air.
  • Reduce the Chances of Getting Air Borne Diseases and Infections: Pollen, dust, and bacteria cause allergies and diseases in the body. Air purifiers with filters that can kill microorganisms as well as those that trap large particles will keep the air clean and pure. They also trap insects like mosquitoes which reduces the chances of getting malaria and dengue.
  • Reduces Stress Levels and Improves Sleep: These devices make a sound that is pleasant to the ears. As the air around you becomes fresher, so does your mood. It reduces the levels of carbon dioxide which makes the air cooler and keeps you healthier. As a result, your body’s cortisol levels reduce, which reduces stress and negativity, thereby promoting sleep.

Do Air Purifiers Really Work?

Well, let me tell you that this may not be as simple as it seems. An air purifier cannot work without a filter which is in a good condition. To understand this better, let’s understand what is it in the air we need to purify.

Following are the particles in the air which are harmful to us:

Volatile Organic Compounds: These are odourless vapours released by gasoline, wood, cigarettes and natural gas. They are extremely dangerous and very few filters can actually clean them.

Particulate Matter: Big particles such as dust, soot, pollen and other particles are present in the air. Some of them have a diameter of 10 micrometres or less, while others are smaller than even 2.5 micrometres. A good air purifier should be able to filter the latter as they are more dangerous.

Greenhouse & Poisonous Gases: Carbon Monoxide, Ozone, Sulphur Dioxide and Nitrogen Dioxide are some of the poisonous gases that can be extremely harmful. Not all air purifiers are designed to absorb them.

Microbes: Microorganisms like bacteria, virus and fungi in the air are not really pollutants but are still a hazard for our health. Your air purifier should be able to clear even viruses, the smallest of the lot.

Not only this, but your air purifier needs maintenance too. You need to change your filter from time to time so that it works efficiently. Else, it is of no use. In fact, one that also acts as a fan might prove to be bad for you.

So, when you choose to buy an air purifier, you have to be extremely careful. This is why I’ve provided a buying guide along with the best quality purifiers available in the market.

Your Buying Guide


Following are the main factors to consider to buy the best air purifier for your room:

1. Size

The size of your room needs to be taken into consideration. The purifier must have the capacity to purify the room as fast as possible.

2. Speed

The minimum required cleaning speed of the device should be 300-350, depending on your room size.

3. Technology

There are many types of air purifiers such as HEPA (High-Efficiency Particulate Air), UVGI (Ultra-Violet Germicidal Irradiation) and Ionizing Purifiers. Some are more efficient with cleaning bigger particles and pollutants while some are more efficient with killing micro-organisms and small particles. Choose a purifier that has multiple filters that can safely clean and purify both.

4. Price

Judge the price on the basis of the efficiency of the purifier as well as its maintenance cost. It makes no sense to buy a purifier who filters have to be replaced every now and then, each replacement costing you, say an extra $30.

5. Quality Standard

Different products have different quality certifications. In this case, look for a product certified by AHAM (Association of Home Appliance Manufacturers) and verified by the Environmental Protection Agency.

6. Air Purifier Reviews

Product reviews are a must, especially when it comes to a one-time investment product. Moreover, an air purifier needs to be efficient to solve the main problem you are facing: breathing problems, insects or allergy. Go through reviews of the top air purifiers in the market and buy on the basis of customers’ experiences.

Given that our sophisticated lifestyle hasn’t been very kind to the environment, the least we can do is help with reducing some levels of emissions in the atmosphere. Thus, to help you take a step ahead, I’ve listed some of the best air purifiers you can actually buy for your home or office.

Best Air Purifiers for You

There are plenty of air purifiers available in the market. Out of them, I have listed the best 3 for you. Not only have they received good ratings from customers but are also high in demand.

Dyson Hot & Cool Air Purifier

Not only is this device an excellent air purifier, but it also maintains the room’s temperature. So, in the summer it acts like a fan and in the winter, it acts like a heater.

The HEPA filter will remove dust, pollens, bacteria, pollutants, odour and allergens. Being a smart purifier, you can control it from the app or even through Amazon Alexa. To top it all, it is easy to clean, has an automatic night mode and sleep timer.

Removal Capacity: 99.97% allergens and 0.3 microns

Price: $558.44

Winix True HEPA 6300-2 Air Cleaner with PlasmaWave Technology

This Winix air purifier uses plasma wave technology as well as a HEPA filter to clear dust, pollens, microbes, odours and several other pollutants. The package contains 8 carbon filters along with the device.

You can install this in a room up to 400 square feet. Some of the interesting features you’ll get are LCD display, auto shut-off and smart sensors.

Removal Capacity: 99.97% filtration

Price: $360

Dyson Pure Cool Me Personal Purifying Fan

This air purifier by Dyson is comparatively cheaper, but has only cooling feature. According to a Dyson Pure Cool Me review, this is the user’s favourite fan as it also clears all kinds of pollutants, bacteria, pollen and dust.

You’ll get an LCD display on this device that shows the level of airflow and filter life. It works quietly at night and a single filter will work for a year if you use it for 12 hours a day.

Removal Capacity: 99.97% of allergens and pollutants

Price: $299.99

What are the Alternatives to Air Purifiers that You Can Have?

Having an air purifier is undoubtedly beneficial for breathing clean air at home. However, one air purifier will cleanse air within a certain area. Having one device in every room would be quite an impractical thing to do.

Hence, for certain rooms, you can have alternatives that are simpler to maintain and beautify your space. Are you wondering what I am talking about?

Long before air purifiers were invented, nature would keep the air clean. This biological agent of nature, that absorbs carbon dioxide and gives out cool oxygen is a plant or tree. In fact, there are plenty of indoor plants that clean the air and remove toxins.

Want to take a look? Let’s scroll ahead.

Best Indoor Plants for Air Purification

An indoor plant needs only very little water for maintenance. You can have them in your hall, balcony, kitchen, bedroom or even in the bathroom. Following are some of the best indoor plants that clean air:

  • Barberton Daisy
  • Dwarf Date Palm
  • English Ivy
  • Peace Lily
  • Spider Plant
  • Chrysanthemum
  • Areca Palm
  • Snake Plant
  • Flamingo Lily
  • Bamboo Palm

The air inside can be 5 times dirtier than the air outside. While an air purifier removes the bigger pollutants, gases like ammonia, benzene and carbon monoxide are removed by plants. Don’t you think reversing air pollution has become simpler?

While air purifiers control air pollution, you can also prevent global warming. Solar power is gaining popularity here. So, you can check out solar water heaters which use the energy of the sun to give hot water.

About the author

Shikha Mehta

I discovered my talent in writing while I was in high school. Since then, I discovered the joy of sharing your knowledge with people around you. This is the reason why I love making my contributions to Insights of Technology. Being a certified content writer, I have been writing on several topics, science & technology being one of my favorites.

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