If you find yourself sneezing and coughing upon waking up, you may be suffering from an allergic reaction to air pollutants in your bedroom.
To help you choose the air purifier for you, I’ve reviewed the best air purifiers for bedrooms that you can buy in 2020.
Best Air Purifiers for Bedrooms
- Coway AP-1512HH
- Winix 5500-2
- Alen BreatheSmart Classic
- Levoit LV-H132 Compact Air Purifier
- Blueair Blue Pure 411
- GermGuardian AC4825
The 6 Best Air Purifiers for Bedrooms in 2021
1. Coway AP-1512HH 
The Coway AP-1512HH is a great air cleaner for bedrooms thanks to its low noise levels, high-performance capabilities, and the vast array of features it offers.
This air purifier has 3 fan speeds, with a noise level that starts at 24.4 dB at the lowest setting. Even at the highest fan speed, the noise the device produces doesn’t exceed 54 dB.
With a four-stage air filtration system, you can be sure it’ll deal with all particles in your bedroom. First, the air passes through a washable pre-filter that captures large particles like human and pet hair, as well as mold spores. Then, it goes through an activated carbon filter to deodorize your bedroom and keep it smelling fresh.
The next step is a True HEPA filter that captures virus particles, pollen, fungi and dust particles, and allergens as tiny as 0.3 microns. Finally, there's an optional ionizer step to trap even smaller particles and send them back to the previous filters.
Lastly, there’s an air quality LED indicator that turns blue when the air is clean, purple when it’s half-clean, and red when air quality is bad.
| Filters | Pre-Filter, Deodorization Filter, and True HEPA Filter |
| Coverage | 361 sq. ft. in 12.5 minutes or up to 874 sq. ft. in 30 minutes sq. ft. |
| Power Consumption | 4.977.8 W CFM 246 |
| Sleep Mode | Yes |
| Noise Levels | 53.8 dB |
| Warranty | Lifetime (with replacing filter subscription) |
Pros:
- Sleek, compact frame that packs an array of extra features
- High filtering capabilities
- Affordable replacement filter
- Impressive room coverage of up to 361 square feet
- AHAM-certified
- Quiet operation even at highest fan speed
Cons:
- Pricier than some of the other models
- Prominent LED light might be distracting
- No remote control
2. Winix 5500-2
The Winix 5500-2 may not be the cheapest room air purifier on this list, but it certainly offers great value for money without sacrificing any essential features.
The pre-filter traps large particulates such as pollen and pet dander, while the True HEPA filter captures the smaller pollutants like smoke particles and other allergens. Finally, the activated carbon filter works in tandem with Winix's PlasmaWave filter to rid the air of any odor, cigarette smoke, or lingering pollutants.
One small touch that I truly appreciated was how the carbon filter isn't disposable but washable, which is both an environmentally and pocket-friendly touch.
While its first 2 fan speeds produce very little operation noise, this air purifier fares slightly worse than the Coway on the 2 highest fan settings. But don’t lose sleep over this slight disadvantage; it has a Sleep Mode.
The air purifier is equipped with smart sensors that gauge the amount of light in your bedroom and automatically activate Sleep Mode when the bedroom is darkened. This minimizes the noise at night by operating the fan at the lowest possible speed.
| Filters | Pre-filter, True HEPA Filter, and Carbon Filter |
| Coverage | 360 sq. ft. |
| Power Consumption | |
| Sleep Mode | Automatically Activates |
| Noise Levels | 27.8 dB |
| Warranty | Two year limited mfg. Warranty. |
Pros:
- Effective PlasmaWave technology for an odorless bedroom
- Affordable filter replacement
- True HEPA filter capturing up to 99.9% of air pollutants
- Sleep mode
- Washable carbon filter to remove air odors
- Sleek design
- Excellent room coverage
- 4 fan speed settings
- Comes with a remote control
Cons:
- Auto mode sensor could be more sensitive
- No backlight on the remote makes it difficult to use at night
3. Alen BreatheSmart Classic
The Alen BreatheSmart Classic is a beast of an air purifier for those who can afford it. This air purifier is by far the largest on this list and would be an excellent choice for a large bedroom.
At its highest speed, I've recorded a noise level of around 49 dB, which is lower than other air purifiers on the list, and it produces a pink noise frequency that shouldn’t interfere with your sleep.
I was impressed by the air filter setup in this device. As usual, there’s a pre-filter to deal with the largest particles first. Then, you get to choose from 4 HEPA filter options.
The standard HEPA filter, HEPA-Pure, captures 99% of small particles in your bedroom, such as dust mites and pollen. The next level, called HEPA-Fresh, has an additional Activated Carbon filter to deal with unwanted odors like cooking smells and cigarette smoke.
HEPA-Silver is the third upgrade, and it comes with anti-microbial Silver-Ion threads to prevent bacteria and mold growth. The final HEPA filter upgrade is called HEPA-OdorCell. It boasts Alen’s Molecular Conversion Powder that traps and destroys odors on a molecular level.
| Filters |
Pre-filter, Medical Grade H13 True HEPA Filter, and Carbon Filter |
| Coverage | 1,100 sq. ft. |
| Power Consumption | 60W |
| Sleep Mode | |
| Noise Levels | 1 GB |
| Warranty | All alen's air purifiers include a warranty if used in the contiguous united states only. |
Pros:
- Impressive room coverage suitable for a large bedroom
- Great air cleaning performance
- Energy Star certification
- 4 fan speed options
- True HEPA filtration that removes 0.3-micron particles
- Ozone-free ionizer to facilitate trapping molecules in HEPA filter
- Air quality sensor light
- Lifetime warranty
Cons:
- Premium price
- Expensive filter replacement
- Higher power consumption
- Portability suffers as a result of its heavyweight
4. Levoit LV-H132 Compact Air Purifier 
If you have a small or medium-sized bedroom, buying an air purifier with lesser square footage may be a better, more energy-efficient choice. The Levoit LV-H132 is an affordable HEPA air purifier that provides excellent indoor air quality.
On low fan speed, the noise this model makes, only 25 dB, is almost invisible. It's slightly more noticeable in medium and high settings, but it's not distracting at all.
I've used this air purifier for a few months, and it maintained an excellent air quality even after months of use. Unfortunately, it got more noisy after a few months of use, so keep that in mind if you’re noise-sensitive.
The Levoit LV-H132 employs a 3-stage air filtration system. It consists of a pre-filter to capture dander and particles like dust mites, a True HEPA filter to capture airborne particles as small as 0.3 microns, and an activated carbon filter to remove lingering odors and keep the air smelling fresh.
Overall, this is a compact and stylish HEPA air cleaner suitable for a small bedroom of around 129 square feet. It rids the air of dust particles, smoke, and pet dander and operates at a low noise level that won’t disturb your sleep at night.
| Filters | Pre-filter, True HEPA Filter, and Carbon Filter |
| Coverage | 300 sq. ft. |
| Power Consumption | 50W |
| Sleep Mode | |
| Noise Levels | 41.2 – 53.7 dBA |
| Warranty | Lifetime (with replacing filter subscription) |
Pros:
- Quiet operation
- 4-setting timer
- Filter replacement reminder
- 3-stage air filtration including True HEPA filter
- 2-year warranty and lifetime support.
- Ozone-free
- Wi-Fi connectivity for easy control
- Lightweight and portable
Cons:
- No automatic shut-off feature
- Noise level may go up with prolonged use
5. Blueair Blue Pure 411 
Running an air purifier in your bedroom all night can get costly pretty quickly. Not with the Blue Pure 411, though! In addition to its affordable price, the Blue Pure 411 air purifier is very energy-efficient and, therefore, won’t cost you a fortune in energy bills.
The device utilizes the HEPASilent technology to increase airflow and energy efficiency while reducing its fan's running for a near-silent operation. Also, it has 3 fan speeds with a quiet noise level at its lowest setting at only 17 dB.
As an air cleaner, it has a 3-stage air cleaning system. First, there’s the pre-filter that deals with larger particles. And its position outside the air purifier is convenient, allowing for easy cleaning.
Instead of using a True HEPA filter, this model uses a polypropylene fibers filter to capture 99% of dust, pollen, mold spores, and pet dander. Enclosed within an activated carbon filter to deal with cigarette smoke and unpleasant odor.
This model’s room coverage is pretty average at around 161 square feet, and like the Levoit LV-H132, it’s better suited to a small or medium-sized bedroom.
All in all, this air purifier may not offer many additional features like Wi-Fi or a timer. But it will maintain good air quality in your bedroom exceptionally well, so I can’t complain.
| Filters | Pre-Filter, Deodorization Filter, and True HEPA Filter |
| Coverage | 161 sq. ft. |
| Power Consumption | 10W |
| Sleep Mode | Auto |
| Noise Levels | 53 dBA |
| Warranty | Extended to two (2) years |
Pros:
- Air intake at 360°
- Energy Star certified
- Excellent air filtration at an affordable price
- Powerful odor removal
- Multiple fabric pre-filter color options
- Lightweight
Cons:
- No Wi-Fi connectivity
- No timer
6. GermGuardian AC4825 
The GermGuardian AC4825 may not be the absolute best air purifier, but it still works as an excellent bedroom air cleaner at an unrivaled price.
To achieve clean air in your bedroom, the AC4825 has 3 stages of filters. The pre-filter is combined with an activated carbon filter to remove large pollutants and reduce bad odors. Next is the True HEPA filter that improves the air quality in your bedroom by capturing approximately 99.9% of particles down to 0.3 microns in size, including pet dander and dust mites.
Additionally, the unit features a blue UV-C light air filter that protects airborne viruses, germs, and mold spores. Unfortunately, the light is very prominent and can be a little distracting at times.
The device offers 3 fan speeds. The noise level was around 40 dB at low speed, which is higher than all other models on the list. However, The highest speed resulted in about 55 dB, which falls within the normal range.
This air purifier is designed for rooms up to 167 sq ft, and like the others in this range, it's best suited for a small to a medium-sized bedroom.
In short, the GermGuardian AC4825 is a no-frills HEPA air purifier with good air purification capabilities at a price that won’t burn a hole in your pocket.
| Filters | Pre-Filter, Deodorization Filter, and True HEPA Filter |
| Coverage | 167 sq. ft. |
| Power Consumption | 44.2, 38.2, and 34.2 watts on high, medium, and low fan speed |
| Sleep Mode | No |
| Noise Levels | 17-46 db |
| Warranty | Limited Warranty |
Pros:
- Great air cleaner at a budget-friendly price
- Easy-to-use replacement filters
- True HEPA filtration system with optional UV-C light
Cons:
- No Wi-Fi connectivity or smart features
- No auto shut-off
Here at Dehumidifier Critic, we have expertly-reviewed the following air purifiers to create our guides.
Coway Airmega 200M, Coway Airmega 400, Coway Airmega 150, Coway Airmega, Coway AP-1512HH, Honeywell HEPA InSight HPA5300B, Honeywell Bluetooth Smart Air Purifier, Honeywell PowerPlus, Honeywell, Honeywell HPA100, Honeywell premium, Blueair Pure 411 Auto, Blueair Classic, Airpura. HEPA filters Blueair, TaoTronics TT-AP005, Blueair 411, Blueair Blue Pure 211+, Blueair Classic 280i, Blue Pure 411, 480i IQAir, IQAir Medical-Grade, Dyson Pure Humidify + Cool, Dyson Pure Hot+Cool Cryptomic, Wynd Halo & Max Bundle, Wynd Plus, Dyson Pure, Molekule, Mokulele, Levoit Core 300, Levoit LV-H132, Levoit H13 True HEPA Air Purifier, Levoit LV-H126, Levoit, Bissell, Levoit Vital 100, LEVOIT, LEVOIT H13, Alen BreatheSmart for HEPA filter, Alen BreatheSmart 45i, Bi-Polar Alen BreatheSmart FIT50, HealthProtect™, GermShield™, AirSoap, Winix, Oransi, PhoneSoap, AM90, Medify, Hathaspace True, AeraMax, TaoTronics HEPA, H13 True HEPA Filter, Partu BS-03, Winix 5500-2, Ikea Fornuftig, KOIOS, Pure Enrichment PureZone 3-In-1, Jinpus, Partu BS-03, Therapure TPP440, Envion by Boneco, TREDY TD-1500, PECO, Winix 5300-2, QuietPure, AHPCO, UV-C, Winix 5500-2, Airpura G600, AllerAir AirMedic Pro 5 Vocarb, Amaircare 3000 VOC, Philips AC3256/30, Winix, Proscenic A8, iAdaptAir, Whirlpool Whispure True, Toshiba, Toshiba Smart Wi-Fi air Purifier, GermGuardian AC4100, GermGuardian - GG1100B (HEPA Filter, Noise Level, Pure Cool Link TP02, Greenote Air Purifier, AHPCO, GermGuardian AC4825.
The above air purifier models were expertly reviewed for DehumidifierCritic.com.
Our resident HVAC engineer Oliver Periman has spent hundreds of hours looking at the air purifier or air cleaner models worldwide. From needing to improve indoor air quality for people with allergy or asthmatics. To helping filter second-hand tobacco smoke using an air handler unit and Pressure swing adsorbers air purifier. We have determined what models are of benefit for Dust, pollen, dander, mold spores, dust mite feces, allergens, allergies, particles, volatile organic compounds and even sick building syndrome.
We hope our expert air purifier content is helpful for you.
Choosing an Air Purifier for Bedrooms
Buying a home air purifier has an assortment of health benefits. But before you pick the next air purifier for your bedroom, there are some factors that you need to keep in mind.
Room Size
Before buying your air purifier, you should consider the square footage of your bedroom. It wouldn’t be wise to buy an air purifier rated for 150 square feet or less if you have a 400 square foot bedroom because it won’t be effective in cleaning the air.
It would be best if you also considered buying a model with more room coverage than what your bedroom requires since it'll have lower, quieter fan speeds that'll be perfect for sleeping.
Noise Level
Air purifiers should run 24/7. If you’re using one in your bedroom, you need to be sure you can live with the noise it makes. Most air purifiers have in-built fans. While some of them operate silently, the vast majority make a humming sound when operating.
The noise rating of air purifiers is measured in decibels (dB). Some models can start as low as 17 dB on the lowest fan setting, while others may produce around 60 dB, approximately like a running refrigerator.
Keep in mind that some air purifiers that operate silently can generate ozone above the recommended level. This may have health repercussions, especially when used overnight in an enclosed space like your bedroom.
Pollutants
A bedroom can contain various pollutants such as pollen, mold spores, or bacteria. It may also contain particles from wood or cigarette smoke to volatile organic compounds (VOCs). Ideally, air purifiers should be able to handle all sorts of pollutants.
However, if you know that one type of pollutant is an issue in your bedroom, then you should pick an air cleaner designed specifically for handling this type of pollutant.
Filter Type
Most air purifiers come with multiple levels of air filtration. Usually, the first stage is a pre-filter to deal with the bigger particles and increase the lifespan of the other, more expensive filters such as True HEPA filters.
While any air filter will have no problem trapping larger particles like mold and pollen, capturing particles smaller ones requires True HEPA filters. Those will have no problem eliminating 99.97% of pollutant particles in your bedroom as small as 0.3 microns.
In addition to a True HEPA filter, air purifiers may also include a carbon filter to trap unwanted smells. You may also find a UV-C light designed to kill any microbes or germs that slipped through the earlier filters.
Performance
There’s often a vast array of metrics indicating how well the device will perform. Before buying air purifiers, consumers need to acquaint themselves with such metrics to make an informed buying decision.
One important metric to consider is CADR, which refers to clean air delivery rate and is related to how much air coverage the air purifier is able to provide. Generally speaking, it’s the cubic feet per minute (CFM) of air that has been purified and purged of all pollutant particles of a given size.
CADR depends on 3 measurements in cfm (cubic feet per minute) for pollen, smoke, and dust. As for mold, checking the pollen measurement is your best bet as pollen and mold are similar in size.
For example, a 135 cfm CADR rating will prevent mold growth in an average-sized bedroom. But, in an exceptionally large bedroom, you should aim for a higher rating.
People can use the CADR rating to compare the performance of air purifiers across manufacturers. The rule of thumb is that the higher the purifier’s CADR number, the more air it’ll be capable of filtering each minute for the particle’s size range.
Moving on to ACH, it stands for Air Changes per Hour. One air change stands for one cycle of the air's entirety in the room, going through the purifier to be filtered. As you can guess, the more air changes your air purifier can perform in an hour, the more efficient it'll be in filtering and purifying the air in your bedroom.
When the air is purified more frequently, new contaminants and pollutants are less likely to build up in your bedroom. Therefore, your bedroom’s air quality will stay impeccable.
With comparable CADR ratings in air purifiers, air purifiers with high ACH ratings will clean the indoor air more quickly. For instance, an air purifier that offers 4 ACH will be a more efficient air cleaner than a 4x ACH one since it'll renew the air 4 times per hour instead of only 3.
Certifications
There are a couple of certifications to look for when buying an air purifier. The first is the Energy Star certification, which ensures that your device will be 40% more energy efficient than standard purifiers.
Another certification to look out for is the AHAM Verified seal. This means that the Association of Home Appliance Manufacturers has tested this model. This certification provides accurate clean air delivery rates (CADRs), air changes per hour (ACH), and room size guidelines.
Energy Consumption
To get the best result out of air purifiers, people need to run them continuously to maintain excellent air quality. Unfortunately, energy bills may go up as a result.
Most air purifiers consume between 5 and 200 watts of power. I recommend checking to see if your air purifier is an Energy Star-rated device since those tend to be more energy-efficient.
The room capacity of your air purifier also plays a role in how much energy they consume. Even the best large room air purifier tends to consume more energy than those with smaller room coverage.
However, this doesn’t mean buying the air purifier with the least room coverage. It all depends on the actual size of your bedroom.
Do Air Purifiers Really Work?
Yes! While no air purifier can 100% clean the air in your bedroom, a good one will be able to eliminate more than 99% of the causes of respiratory distress, including dust, pollen, pet dander, bacteria, and smoke.
If you suffer from allergy or asthma, an air purifier with a HEPA filter may be exactly what you need as it’ll remove fine airborne particles that may exacerbate your symptoms. Just make sure to check the purifier’s air changes per hour (ACH) rate.
Do Air Purifiers Help You Sleep Better?
Many pollutants found in your bedroom can irritate your respiratory system, which will negatively impact your quality of sleep. After all, sneezing and inflamed nasal passages don’t exactly go hand in hand with a good night’s sleep.
A clinical study conducted in 2019 has established that air purification can greatly improve people’s sleep. An air purifier in your bedroom helps enhance sleep by reducing asthma and allergic symptoms.
Should I Run My Air Purifier All Night?
You can't run your air purifier for a few hours only and expect the air quality in your bedroom to improve. In order to get the maximum benefit out of your air purifier, you should run it all day and night long, even while you're sleeping.
Final Thoughts
Investing in an air-cleaning device in your bedroom can dramatically improve the air quality and give you a better night's sleep. With so many options out there, some people may find picking an air purifier a little overwhelming.
But now that you have read my reviews for the best air purifiers for bedrooms, you probably know which one fits your needs and budget. But let me give you a quick recap, just in case.
My top choice is the Coway AP-1512HH. This True HEPA air purifier offers everything you need from an air purifier, from the excellent indoor air quality to the low noise essential for sound sleep. While it’s a little bit pricier than some of the other models on this list, it’s still a great addition to your bedroom that won’t disappoint.
The Winix 5500-2 is a close second, although its noise level is ever-so-slightly higher than the Coway, so keep that in mind. If money is a problem, then either the GermGuardian AC4825 or the Blue Pure 411 air purifiers will be a great air cleaner, but you may need to sacrifice some features.
