The Best Filterless Air Purifiers Under US$100

Image of a filterless air purifier with a price tag under $100

Air pollution is a growing concern in many cities and homes around the world, leading to health problems and decreased air quality. To combat indoor air pollution, air purifiers have become a popular solution. 

While traditional air purifiers require filters, which can be expensive to replace, filterless air purifiers are now available. This article will explore the best filterless air purifiers available for under $100, including one option from Airfree, which utilizes TSS technology for an unfair advantage.

What is a filterless air purifier?

A filterless air purifier, also known as an ionizer, uses negative ions to attract positively charged particles in the air, such as dust and allergens, causing them to become too heavy to remain airborne. These purifiers are generally more affordable and require less maintenance than traditional air purifiers that use filters.

There are several reasons to consider using a filterless air purifier, including being

  • Eco-Friendly – Instead of fighting air pollution with disposable filters and excess waste, filterless air purifiers keep your air clean while staying environmentally conscious. 
  • Affordable – Buying replacement filters can get expensive, but with a filterless model, you won’t have to worry about that. 
  • Low Maintenance – These purifiers require less maintenance and are easier to use without needing to replace filters.

With these advantages in mind, it makes sense that more and more people are looking for filterless air purifiers.

Types of Filterless Air Purifiers 

There are several ways to neutralize and remove particles from the air. When considering what filterless purifier to get, it helps to understand the effectiveness of each type. 

Electrostatic Purifiers

Electrostatic air purifiers use an electrical charge to attract airborne particles and remove them from the air. They are usually portable, easy to use, and cost-effective.

However, electrostatic purifiers have a limited range and are not as effective at removing larger particles from the air. If you’re looking to cover a smaller area, and aren’t as concerned about larger particles, an electrostatic purifier may be a good choice. 

Ozone-based Purifiers 

Ozone-based purifiers use ozone to eliminate airborne particles. Ozone is an effective way to remove particles from the air, but it can also be dangerous if used improperly. Some side effects include irritation to the eyes, throat, and lungs and the environmental impact of ozone. 

If you decide to get an ozone purifier, make sure to use it in a well-ventilated area and follow the manufacturer’s instructions.

Ultraviolet Purifiers 

Ultraviolet light purifiers use UV-C bulbs to kill airborne microorganisms like bacteria and viruses. These purifiers are great for eliminating germs and reducing odors in the air. 

On the other hand, UV rays are not as effective at removing other particles from the air, such as dust and pollen. Often a UV purifier will also have a filter or other system in place to handle these particulates.

TSS (Thermodynamic Sterilizing System)

The modern issue of indoor air pollution requires a modern solution. Airfree has created a powerful, effective process that still provides the benefits of other filterless options without losing any of the safety. 

The patented Thermodynamic Sterilizing System (TSS) technology is a filterless air purifier that uses heat to destroy air pollutants, including bacteria, viruses, mold, and dust mites. It’s safe and efficient, making it one of the most effective filterless air purifiers on the market. 

Each filter-free purification system has its strengths, but one of the biggest is not constantly replacing a filter. Pure, clean air should be accessible to everyone. Reducing the cost, time, and environmental impact of constantly replacing filters is a huge selling point. 

What’s better, you can find models for small to medium rooms that aren’t as expensive as you might think. 

Things To Consider When Buying an Air Purifier 

Whatever air purifier you get will be responsible for keeping your home free and clear of indoor pollution. That’s no small task, as the World Health Organization credits indoor air quality as a leading factor in 3.2 million deaths in 2020 alone. It’s important that you choose the right defense. 

Consideration One: Size 

What works for a bathroom will not likely work for an open-concept kitchen, dining room, or living room. It makes sense then that the size of your air purifier must match the size of the room you’re attempting to purify. 

If the purifier is too small, it won’t be able to clean the air of all pollutants effectively. It will be too powerful and waste energy if it’s too large. Many purifiers come with a rating of how many square feet they can purify. 

Consideration Two: Budget 

Air purifiers can range in price from $30 to thousands of dollars. However, safe and clean air shouldn’t be locked behind a paywall. Our list includes low-cost options that pack a punch and keep your family safe. 

The added bonus of a filterless purifier is that you won’t need to replace the filters continually. This is a one-time purchase that will keep your air fresh for years to come. 

Consideration Three: Noise 

Many air purifiers come with fans that can be quite loud. If you’re looking for something to keep in a bedroom or a space you spend a lot of time in, that can be a major distraction. Many purifiers come with noise ratings, so you can assess how loud it will be in the room. 

Consideration Four: Power Source 

Some air purifiers are corded and require an outlet, while others are wireless and can run on batteries. If you’re looking for an air purifier to take on the go, you’ll need to look into a battery-powered option or something that can be charged with a USB. 

You’ll also want to remember the amount of energy a purifier requires. If your reason for going filterless is ecological concerns, you’ll want to make sure the purifier you choose is energy efficient.

The Best Filterless Air Purifiers Under $100

Let’s look at some of the most powerful filterless air purifiers you can bring into your life without breaking the bank.

Let’s look at some of the most powerful filterless air purifiers you can bring into your life without breaking the bank.

Therapure Mini Air Purifier 

This purifier is perfect for small spaces like bathrooms, closets, and pantries. It uses UV light to deal with any odors, germs, and even allergens in the air. With its small, sleek design, it’s able to be plugged in and left to work. 

IonPacific Ionbox 

The Ionbox is a small but mighty purifier that keeps your air free of particles. It has an energy-efficient design and is portable, making it an ideal choice for those who want to take their purifier with them. You can even power it with nothing but a laptop!

PureAir 50

The PureAir 50 is a convenient and simple purifier that uses ionization to keep your air clean. It’s great for those who want something that is both powerful and unobtrusive. You can simply plug it into the wall and let it run, covering an insane 325 square feet.

Completely silent and using a small amount of energy, this purifier has no problem running all day long.  

The unfair advantage of Airfree – TSS technology

Airfree is a leading brand in filterless air purifiers, and its advantage comes from its patented TSS (Thermodynamic Sterilization System) technology. This technology uses heat to destroy airborne contaminants like mold, bacteria, and viruses. The purified air is then cooled and released back into the room. This process ensures that the air is sterilized and free of contaminants, providing a healthy living environment.

Airfree’s TSS technology provides many benefits for your home or office. It offers highly effective air purification, eliminating airborne particles that can cause allergies, asthma, and other respiratory issues. It also helps to reduce odors and improve air quality by removing contaminants from the air.

It wouldn’t feel right to put one of Airfree’s purifiers in the same category as these other models because TSS is so effective without any of the shortcomings that other similarly priced purifiers have. That’s why we’ve put it here in a place of honor. 

Airfree T: The Number One Filterless Air Purifier Under $100

The Airfree T is a filterless air purifier that utilizes TSS technology for superior purification. It can cover up to 180 square feet, making it ideal for small to medium-sized rooms. Its compact and modern design makes it a great addition to any room, and it operates silently, making it perfect for use in bedrooms and living spaces. 

This air purifier is also energy-efficient and does not require any maintenance, making it a convenient and cost-effective solution for cleaner air. With TSS technology, the Airfree T ensures that the air is sterilized and free of contaminants, providing a healthy and safe living environment.


Filterless air purifiers are a great option for those looking to improve indoor air quality without the expense and maintenance of traditional filter-based purifiers.

Airfree’s TSS technology sets them apart from other filterless purifiers, ensuring that the air is sterilized and free of contaminants, providing a healthy and safe living environment. Investing in a filterless air purifier allows you to breathe easily, knowing that you are doing your part to combat indoor air pollution and keep your family safe.


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