Moving away from home can be an exciting experience, but living in close quarters with one or more roommates can be a daunting experience.
As you prepare to get your first taste of independent living, it makes sense to consider bringing an air purifier with you to fend off unwanted smells and protect your personal space from the dreaded freshman plague rife on campus, ready to strike against weary students.
The right air purifier will draw in air from your dorm and pass it through a series of filters that capture dust, pollen, smoke, odors and viruses. What’s left behind is clean, fresh air that will be redistributed into the space.
In this article, I shortlisted a handful of budget-friendly air purifiers that will not take up a lot of space but that are powerful enough to actually make a difference. We bought each device on this list with our own money so that we could run our usual battery of tests to assess their air cleaning performance, noise levels generated, energy consumption, yearly running costs and long-term user experience.
If you don’t have time to read my full article, check out the table below for a quick TL;DR of all the air purifiers I recommend for dorm rooms:
| SMALL DORMS | LARGE DORMS | PORTABLE OPTION | |
|---|---|---|---|
| Levoit Eleva 300X | AirFanta 3Pro | CleanAirKits Triple Exhalaron | |
 |  |  | |
| PM1 CADR | 165 cfm | 353 cfm | 128 cfm |
| Filter tech | HEPA filter + carbon filter | Particle filter + optional carbon | Particle filter + carbon fabric layer |
| Max room size | 247 sq. ft. (23 m2) | 529 sq. ft. (49 m2) | 192 sq. ft. (18 m2) |
| Yearly running costs | $98.32 | $187.34 | $126.02 |
| List price | $129.99 | $164.99 | $359.00 |
1. Best air purifier for small dorm rooms: Levoit Eleva 300X
Our top pick for dorm rooms no larger than 247 sq. ft. (or 23 m2) is a small air purifier with smart features that you can find for less than $130.
If you are looking for a small air purifier you can have next to your bed or on top of your desk, then the Eleva 300X from Levoit might be just what you want. With a PM1 CADR of 165 cfm, this device can provide five air changes per hour in dorm rooms up to 247 sq. ft. (or 23 m2).
You get two separate filters: a HEPA filter that removes particles like pollen and dust from the air and an activated carbon filter that adsorbs unwanted odors and chemical gases.
It has a laser sensor inside so you can set it to Auto mode and it will adjust fan speeds based on the air quality of your dorm room. You can see air quality metrics at the top, next to the controls.
CONS
PROS
| Clean air delivery rate (CADR): | – Top speed PM1 CADR: 165 cfm – Sub-45 dBA PM1 CADR: 115 cfm |
| Filter technology: | Separate HEPA particle filter and gas filter with activated carbon pellets. |
| Recommended room size (5 air changes per hour): | 247 sq. ft. (23 m2) |
| Dimensions: | 9.4 x 9.4 x 15.1 in (23.8 x 23.8 x 38.3 cm) |
| Weight: | 9.9 lbs (4.5 kg) |
| Noise level in decibels from 3 ft. away: | Sleep mode: 35.8 dBA Speed 1: 36.8 dBA Speed 2: 39.8 dBA Speed 3: 44.9 dBA Turbo speed: 55.4 dBA |
| Electricity consumption in watts: | Standby: 0.65 watts Sleep mode: 1.85 watts Speed 1: 5.33 watts Speed 2: 6.91 watts Speed 3: 10.03 watts Turbo speed: 23.91 watts |
| Filter lifespan: | HEPA filter: 2 years Carbon filter: 6 months |
| Manufacturer’s warranty: | 2 years |
| Country of origin: | United States |
| Country of manufacture: | China |
2. Best for large rooms: AirFanta 3Pro
With a PM1 CADR of 353 cfm, the 3Pro can clean the air in larger dorm rooms (up to 529 sq. ft. or 49 m2) for just $175.99 if you go for the HEPA + carbon version.
The AirFanta 3Pro is part of a new generation of air purifiers that are powered by PC fans, which make them a lot quieter and more energy efficient than traditional devices you will find at a retail store.
The design of the 3Pro is inspired by a popular DIY air purifier you might have heard of called the Corsi-Rosenthal Box. You get a plastic base and a filter at each side that you will secure with an array of four PC fans on top. To remove smells as well as particles, get the version with carbon filters.
And even though it’s very powerful, it is also relatively compact device (12.6 x inches, or 32 x 32 cm). Plus, it’s the only air purifier I’ve tested that can be disassembled and carried inside a backpack – handy for when the time comes to go back home or move to a new place.
CONS
PROS
| Clean air delivery rate (CADR): | – Top speed PM1 CADR: 353 cfm – Sub-45 dBA PM1 CADR: 213 cfm |
| Filter technology: | True HEPA H11 and optional pelleted activated carbon |
| Recommended room size: | 529 sq. ft. (5 air changes per hour) |
| Dimensions: | 12.6D x 12.6W x 12.6H inches (32D x 32W X 32H cm) |
| Weight: | 7.7 lbs (3.49 kg) |
| Noise level in decibels from 3 ft. away: | 3.63 volts: 36.1 dB 4.19 volts: 36.9 dB 5.24 volts: 39.7 dB 6.54 volts: 43.3 dB 7.44 volts: 46.7 dB 8.56 volts: 49.1 dB 12.6 volts: 56.3 dB |
| Electricity consumption in watts : | 43.23 watts |
| Filter lifespan: | 6 – 12 months |
| Manufacturer’s warranty: | 1 year |
| Country of origin: | China |
| Country of manufacture: | China |
3. Best portable option: CleanAirKits Triple Exhalaron
The Triple Exhalaron is the only air purifier I’ve tested that can be used on the go with a battery back.
If you are looking for a small air purifier you can use in your dorm but can also take with you to the library or bring to study groups, then look no further than the Triple Exhalaron from CleanAirKits. With a PM1 CADR of 128 cfm, it can offer five air changes per hour in dorm rooms up to 192 sq. ft. (or 18 m2).
The design is pretty unique and consists of three cylindrical filters (with activated carbon) that sit between a thin wooden base and a thick wooden top that houses three incredibly quiet and energy-efficient CoolerMaster Mobius argb (2400 rpm) PC fans.
You can plug it in or you can use with a a battery pack (with a male USB-C pigtail) and can get up to 10 hours of use with a 20,000 mAh battery. There are no fancy features – just a knob to change fan speeds.
CONS
PROS
It has a CADR of 128 cfm, so it will be able to give you five air changes per hour in dorm rooms no larger than 192 sq. ft. This air purifier is super quiet, hitting just 40.5 dB when running at its top fan speed, while still being able to clean the air faster than popular small devices like the Levoit Core 300.
| Clean air delivery rate (CADR): | – Top speed PM1 CADR: 128 cfm – Sub-45 dBA PM1 CADR: 128 cfm |
| Filter technology: | HEPA H11 with a layer of carbon-impregnated fabric |
| Recommended room size: | 192 sq. ft. (5 air changes per hour) |
| Dimensions: | 22W x 7.25D x 8.5H in (56W x 14D x 22 cm) |
| Weight: | 6 lbs (2.72 kg) |
| Noise level in decibels from 3 ft. away: | Speed 1: 35.2 dBA Speed 2: 37.7 dBA Speed 3: 40.5 dBA |
| Electricity consumption in watts: | Standby: 0.1 watts Speed 1: 1.1 watts Speed 2: 2.8 watts Speed 3: 6 watts |
| Filter lifespan: | 6 months |
| Manufacturer’s warranty: | 1 year |
| Country of origin: | United States |
| Country of manufacture: | United States |
Special mentions
These air purifiers didn’t make the final list but they are solid performers and might be a better fit for what you’re looking for.
Coway Airmega Mighty2
If you’ve got the space, then the Coway Airmega Mighty2 might be a good choice. It’s relatively small and comes with an onboard sensor that unlocks smart modes.
Based on our tests, we estimate a PM1 CADR of 260 cfm that is powerful enough to clean the air five times per hour in dorm rooms up to 390 sq. ft. (or 36 m2).
Dyson HushJet Compact HJ10
If you’re willing to pay ‘the Dyson tax’, then the new HushJet Compact is an excellent air purifier with whisper-quiet operation and app support.
We estimate a PM1 CADR of 160 cfm so it packs the power needed to provide five air changes per hour in small dorm rooms up to 240 sq. ft. (or 22 m2).
Tips for buying a good air purifier for your dorm room
Sadly, many dorm rooms in America are in older buildings with poor ventilation, which can mean levels of indoor pollutants can quickly rise and cause problems. To get the most from college, you must create a space in your dorm room with the clean air your brain and body need to do their best work.
You should try to ventilate the dorm room as much as possible, but when this isn’t possible, an air purifier can do a great job of keeping the air clean of allergens in the form of pollen, dust, viruses and chemical gases.
Keep these tips in mind before buying an air purifier to take with you to campus.
1. Consider the size of your dorm room
The average dorm room in the United States measures around 228 square feet for a dorm room with two students. The good news is that smaller spaces need smaller air purifiers to be effective. Most air purifiers are given a CADR score that is used to give you an indication of an air purifier’s cleaning power. Higher CADR will allow you to keep a large space clean.
An average double-person dorm room of 228 square feet with an 8ft ceiling will need a CADR score of 152 CFM to provide the five (5) air changes per hour that the CDC recommends for portable air cleaners. This means that my number one pick for dorm rooms (the Levoit Eleva 300X) , will be able to meet and exceed this figure with its 165 cfm.
You can use our CFM calculator to find out what CADR you need to clean the air in your dorm room at least four times per hour:
2. Look for activated carbon filtration if you worry about odors
Particle filters like HEPA or MERV are great for removing the tiny particles from the air in a dorm room but won’t do anything about the odors that come with student living. An activated carbon filter can help to catch these smells and keep the dorm room smelling better.
As a rule of thumb, you will want to choose an air purifier that uses pelleted carbon vs. the impregnated carbon fabric as we found that the latter will quickly lose effectiveness at removing odors.
3. Calculate long-term running costs
Most dorm rooms include free electricity usage. However, you will still need to replace the filters every 6-12 months. Read our full reviews or use our air purifier comparison tool to find out how much money you will need to budget to run your desired air purifier.
Be aware that running a large air purifier is often cheaper than you need as the filters are bigger and need replacing less often but often cost very similar.
4. Decide whether you need smart features or not
From your fridge to your TV, it feels like every appliance is smart nowadays and it turns out that the same can be said for air purifiers.
The benefit of smart features is that they come with an onboard air quality sensor that unlocks auto modes, where the air purifier will kick in to top speed when the sensor detects pollutants in the air.
This could be particularly handy for a kitchen but it might not be as critical for a dorm room. If money is a concern, you can save some $$ on a non-smart unit.
Final thoughts
Unlike most guides to air purifiers you will come across on the internet, I have actually bought each of the air purifiers I recommended here with my own money so I could test everything about them. If you buy a device using the buttons or links on this page, we will get a small affiliate commission to no extra cost to you.
If you still can’t find the right air purifier for your dorm room or if you have any questions about the models I highlighted on here, please drop a comment below or email me to danny@housefresh.com and I’ll reply as soon as I can.
And if you already have a specific model in mind, take a moment to see if it’s a unit in our collection so you can compare its performance, sound levels, energy consumption and long term running costs to the more than 150 models I have tested to date:
