5 Best Air Purifiers to Kill Germs in Your Classroom

With the Threat of Coronavirus and Germs that Spread Easily with Kids, it’s Crucial to Find an Air Purifier that Creates a Healthy Classroom

air filter for pet allergies from dogs

By Liz Somerville

12 min read

During COVID-19, teachers are on the front line when students are in the classroom. You’re already busy multi-tasking when you’re a teacher, and you shouldn’t have to stress about threats to you and your student’s health. Regardless of a pandemic, being around children exposes you to more germs.

Kids have more daily social contacts and are at high risk for catching and spreading infections.

So what are germs and how long do germs live? Germs are tiny organisms that can cause viruses and diseases, and they can live up to a week.

Top Pick

Alen BreatheSmart 75i Air Purifier

Buy on Amazon
HEPA graph

A HEPA filter in an air purifier can capture large and microscopic particles that cause health concerns, including germs that spread viruses. Adding an air purifier to a central location in your classroom will keep you and your students healthy, encourage more students to focus on learning, and help you be more productive. Enjoy less stress and more health benefits when you find an air purifier that protects the square feet of your classroom and offers quiet and minimal disruptions.

Best Classroom Air Purifier for Germs

2nd Best Classroom Air Purifier for Germs

Better Classroom Air Purifier for Germs

Good Classroom Air Purifier for Germs

2nd Good Classroom Air Purifier for Germs

BreathSmart 75i
Air Purifier

$813 Buy on Amazon
Health Pro
Air Purifier

$899 Buy on Amazon
Classic 605
Air Purifier

$498 Buy on Amazon
Austin Air
Healthmate Plus
Air Purifier

$715 Buy on Amazon
AirMega 400
Air Purifier

$520 Buy on Amazon

Best Classroom Air Purifier for Germs

Alen BreatheSmart 75i Air Purifier

$ 813 Buy on Amazon


Lifetime warranty

Ionizer offers extra sanitation against germs and bacteria

Cleans huge classrooms up to 1300 square feet


It's a bit larger than other air purifiers, so that you may have fewer placement options

Features and Specs

  • Dimensions: 15D x 23W x 30.75H inches
  • Weight: 35 pounds
  • 75i True HEPA filter and activated carbon
  • Cleans 1300 square feet every 30 minutes
  • Designer panel (optional)
  • Lifetime warranty
  • Five speeds: Speed 1: 95 CFM; Speed 2: 170 CFM; Speed 3: 238 CFM; Speed 4: 280 CFM; Turbo: 350 CFM
  • 1,300 square feet room coverage
  • Ionizer
  • Filter life indicator

The Alen BreathSmart 75i is our top pick for a germ air purifier in the classroom since it protects 1,300 square feet from 99.99% of harmful air particulates greater than 0.1 microns. The antimicrobial HEPA filter has the power to capture small and large particles along with germs that can make you and your students sick. It also has activated carbon that offers extra protection by adsorbing chemicals and toxic gases.

This air purifier cleans the air every 30 minutes with WhisperMax technology, so you won't be distracted while teaching and your students can stay focused. You can also add an ionizer to this air purifier, which adds extra sanitization against germs and bacteria with charged particles that trap contaminants. The BreatheSmart 75i can effectively protect any classroom due to the HEPA, self-adjusted cleaning power, and lifetime warranty.

2nd Best Classroom Air Purifier for Germs

IQAir HealthPro Plus Air Purifier

$ 899 Buy on Amazon


The HyperHEPA filter last 3-4 years

10-year warranty

Protects huge classrooms up to 1,240 square feet in size


More expensive compared to competitors

Features and Specs

  • Dimensions: 16D x 15W x 28H inches
  • Weight: 29 pounds
  • HyperHEPA filter and PreMax filter
  • IQAir system is reliable and has no harmful byproducts
  • 1,240 square-foot coverage area
  • Six fan speeds
  • 10-year warranty

When an air purifier is working to protect multiple students, that means you want a long-lasting HEPA filter that works hard. The IQAir HealthPro protects you from even the smallest particles, including microscopic germs. Ultrafine germ particles and air droplets can affect many organs, creating serious health concerns. The HyperHEPA can even remove these ultrafine 0.003-micron air particulates so that no unhealthy air particles will slip through the cracks.

This air purifier also protects large classrooms up to 1,240 square feet, so you and all of your students can feel the benefits of clean indoor air. You'll hear less coughing and sneezing, have fewer absences, and feel safe teaching during the COVID pandemic. The IQAir system in the IQAir HealthPro has no harmful byproducts, and you can have more peace-of-mind with a 10-year warranty.

Better Classroom Air Purifier for Germs

BlueAir Classic 605 Air Purifier

$ 498 Buy on Amazon


Wi-Fi enabled with Blueair Friend app control and compatible with Amazon Alexa

A whisper-quiet operation for minimal disruptions

Durable design and materials that last


May not provide coverage for large classroom sizes

Features and Specs

  • Dimensions: 13D x 20W x 26H inches
  • Weight: 31 pounds
  • HEPASilent technology
  • 32 - 62 db noise level
  • 698 square foot coverage area
  • Three different fan speeds
  • Smart control with Blueairapp and Alexa

Teachers know that distractions in the classroom can create a nightmare. The BlueAir Classic 605 gives you fewer disruptions while you're teaching, with Smart control and a quiet 32-decibel noise level. Your classroom will have excellent air quality, and you and your students won't hear it happening. Remote controlling with the Blueair Friend app or voice control with Alexa also means that you won't have to get up in the middle of a lesson to control the air purifier.

The HEPASilent technology traps germs that create illnesses that spread rapidly amongst kids in the classroom. This method utilizes electrostatic charge and mechanical filtration to capture 99.97 percent of particles that create health concerns. The BlueAir Classic 605 helps create productive and engaged students, and you all get to enjoy the health benefits of clean air.

Good Classroom Air Purifier for Germs

Austin Air Healthmate Plus Air Purifier

$ 715 Buy on Amazon


Covers large offices of up to 1,500 square feet

The four-stage filtration system has a super high success rate of 99.9%

Wheels that offer portability


The larger design isn’t ideal for small or cluttered classrooms

Features and Specs

  • Dimensions: 14.5 x 14.5 x 23 inches
  • Weight: 47 pounds
  • Four-stage filtration system: Two pre-filters, HEPA, and activated carbon with 99.9% effectiveness
  • A 360-degree air filtration system
  • Three fan speed settings
  • 1,500 square feet room coverage
  • 120V and 135 Watt power rating

When you work in a huge classroom, the Austin Air Healthmate Plus Air Purifier can help protect 1,500 square feet from germs and unhealthy pollutants. The true HEPA filter works with 15 pounds of activated carbon to give you and your students comprehensive clean air benefits. The Healthmate Plus is also very compact and maneuverable, so you can tuck it away or move it in any area you need it.

You can feel peace of mind with the five-year warranty and know that the four-stage filtration system works around the clock to keep you and your students from getting sick. The Austin Air Healthmate Plus has two pre-filters, an activated carbon filter, and then particles are trapped in the high-efficiency HEPA filter. You can feel better about your work while you're less exposed to germs and feel safer during flu season and the coronavirus pandemic.

2nd Good Classroom Air Purifier for Germs

Coway Airmega 400 Air Purifier

$ 496 Buy on Amazon


Sufficient noise reduction with a tranquil system at 22-52 decibels

Activated carbon filter absorbs up to 60 percent of its weight in airborne odors, chemicals, and gases

Super large coverage area of 1,560 square feet protects even the largest classrooms


It doesn't offer 100% ozone-free coverage

Features and Specs

  • Dimensions: 9 x 5.5 x 21.5 inches
  • Weight: 24.7 pounds
  • CADR Rating: Smoke (108), Dust (118), and Pollen (125)
  • Optional UV C is used to reduce allergens and kill viruses
  • Five fan modes with super-quiet operation
  • Filters air two times per hour
  • It covers huge rooms of up to 1,560 square feet
  • Smart mode (auto, sleep, eco)
  • Real-time air quality monitoring

The Coway Airmega 400 has high-efficiency HEPA filtration, activated carbon, and extensive classroom coverage. Coway understands that working with kids exposes a classroom to many different air pollutants and bacteria, and the Airmega 400 air purifier does a great job of eliminating small and large-sized air particles along with smoke and chemicals. Classrooms in wildfire zones or science classes can benefit from Coways's activated carbon filter that absorbs up to 60 percent of its weight in wildfire smoke, chemicals, gases, and airborne odors.

You can trust that this air purifier will eliminate 99.97% of 0.3-micron air particles. The combination of the Coway Airmega 400 Max2 filter with HEPA and activated carbon reduces classroom distractions, along with the 22-decibel noise level on the low fan speed. You'll experience fewer students coughing, bad smells, and germs that create illnesses. You can focus on teaching, and students can dedicate more time to their studies with the Airmega 400.

Tips and Key Takeaways

✓ Find an air purifier with a coverage area that protects the square feet of your classroom

✓ Look for certified true HEPA filters and activated carbon if you want particle, germ, chemical, and odor removal

✓ Find a long-lasting filtration system for fewer replacements and costs

✓ Check for a five year or higher warranty 

✓ An air purifier that includes an ionizer and UV light can give you extra sanitization but may be more harmful to the environment

✓ Find an air purifier with a low decibel rating for quiet filtrations and minimal noise distractions

✓ Look for an air purifier that weighs 30 pounds or less if you plan on transporting or maneuvering it often

✓ Double-check the product’s dimensions to make sure it fits in your classroom space