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Air Purifier for Basement

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102

Models Considered

116

Hours of Research

5

Experts Interviewed

864

Consumer Reviews Analyzed

T he basement was always regarded as an unwelcoming space where darkness and mold combine to unleash our worst nightmares. The truth is, it’s time to put an end to this situation and spare the kids of our childhood fears. The basement can easily turn into a nice, storage room with the help of a dehumidifier and an air purifier.

We took our time and carefully analyzed the second variant, so if you have dehumidification covered, read this article and find out how to deal with mildew and mold, germs, viruses, and other floating particles that populate your basement. All it takes is a first-rate air purifier, and we have found 7.

7. Germ Guardian AC4825 – Best for Small Basements


Specifications:
  • Room Coverage: 167 sq. ft.
  • Speed Settings: Low, Medium, High
  • Filtering System: Activated Carbon & True HEPA Filter; UV Light
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: Dust: 118 Pollen: 125, Smoke: 108
  • Rated Power: 56W

  • Noise Level: 40 – 55 dB
  • Air Change Rate: 4/hour
  • Auto Mode:
  • Filter Life: 6 – 8 months
  • Timer:
  • Warranty: 3-year


This model has been tried-out by tens of thousands of buyers who reported it to be cost-effective and reliable. With a last-generation purification system, it can neutralize smells and eliminate particles measuring at least 0.3 microns in diameter, like fine dust, spores, fumes, or VOCs. Apart from that, germs won’t stand a chance when exposed to the ultraviolet light, which can be powered on and off, according to your preferences.

It is quiet (maximum 55 decibels), and features an average CADR of 117 cfm, therefore it is an awesome choice for small basements, measuring up to 167 sq ft, where it can reach its maximum performance. It will circulate the air up to 4 times in an hour, which implies that bacteria and dust won’t even have time to gather. Plus, for better pollution control, it features an Auto function, which determines the degree of contamination and modifies the fan velocity according to real-time readouts.

The fan features 3 speeds, so you can adjust it manually as well by selecting among the ones that can comply with your needs. This option allows you to decrease energy consumption or noise. Nevertheless, we should mention that it has been Energy Star verified and draws a maximum of 56W, so you can select higher speeds as well, without worrying that it will cost you a fortune. The filters will generate additional costs, but they have a decent 6 to 8 months lifespan, so you will only have to change them once or twice a year.

What we like:
  • Generous 3-year warranty
  • Auto mode keeps the pollution level within optimal values
  • UV-light ensures proper air sanitation by killing the germs in the room
  • Energy Star verified
What we dislike:
  • Able to cover only small rooms
  • Some customers reported that it becomes noisier with time
Overview

It is a compact unit that can provide excellent air purification for your small basement. It is quiet and energy-effective and offers many extra features, like a UV lamp or auto mode. Besides that, it comes at a great price and is backed by an excellent 3-year warranty.


6. Winix 5500-2 – Best for the Money


Specifications:
  • Room Coverage: 360 sq. ft.
  • Speed Settings: Low, Medium, High
  • Filtering System: Activated Carbon & True HEPA Filter; WINIX PlasmaWave Technology
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: Dust: 243, Smoke: 232, Pollen: 246
  • Rated Power: 57W

  • Noise Level: 27.8 – 60 dB
  • Air Change Rate: N/A
  • Auto Mode:
  • Filter Life: 12 months
  • Timer:
  • Warranty: 2-year


Another popular choice, this model is usually picked for its ability to cover medium spaces, measuring up to 360 sq ft, while offering a performant filtering method. It includes high-end filters, which are topped with a germ and VOC-filtering layer, namely the PlasmaWave technology. It emits hydroxolits, which combine with the particles that float and neutralize them. Additionally, the filters have an excellent life span, and, if you cleanse the carbon filter regularly, you won’t have to replace them more often than once a year.

The selling price is decent, but the greatest surprise is the cost of operating it over the years, which is incredibly low, as it doesn’t consume more than 57 watts. Moreover, we’ve appreciated its extra functions, which are usually available only in more expensive products. Nevertheless, it includes a timer, smart sensors that measure the quality of the air, an auto function, and comes with a remote, so you will be in control right from the comfort of your couch. Moreover, it offers 4 fan modes, including a sleep option, so, as can be seen, you will receive more for a moderate price.

What we like:
  • Energy-efficient
  • Excellent 99.97% filtering rate
  • Many extra functions included in the price
What we dislike:
  • Filters are rather pricey
  • The pre-filter is rather flimsy
Overview

If you are on the market for a reliable model, which comes with multiple premium functions, this unit is the right option. It can preserve the air pure in small and medium-size basements by removing not only dust and big particles like lint or hair but harmful gases and microorganisms.


5. LEVOIT LV-PUR131 – Best for Allergies


Specifications:
  • Room Coverage: 360 sq. ft.
  • Speed Settings: Low, Medium, High
  • Filtering System: Activated Carbon & True HEPA Filter
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: 135+
  • Rated Power: 40W

  • Noise Level: 27 – 52 dB
  • Air Change Rate: 4-5/hour
  • Auto Mode:
  • Filter Life: 6 months
  • Timer:
  • Warranty: 2-year


It has a sleek design, digital controls, and incorporates a set of ultra-performant filters that can capture all sorts of pollutants, starting with dust mites and ending with gases and other small pollutants that measure more than .3 microns in diameter. The high-velocity fan offers 3 speeds and will circulate the air for up to five times in 60 minutes, a quality that makes it a great pick for allergy sufferers, as it won’t allow allergens to gather into the air. Besides that, it can do its job quietly, as its sound level doesn’t run higher than 52 decibels.

A first-class sensor scans the air by measuring the level of pollution and transmits the info to the auto function, which will adjust the fan velocity to purify the air as faster as possible. The airflow is strong enough to deal with an area measuring up to 360 sq ft, and it has been rated by AHAM with a CADR of 135 cfm. Furthermore, regarding energy consumption, it is one of the most efficient on the market, as it is rated for only 40 watts.

What we like:
  • Sleek and quiet design
  • High-end sensor offers exact data about the quality of the air
  • Energy-efficient
  • Superior filtering efficiency rate
  • WiFi compatible – works with Alexa
What we dislike:
  • The filters are cheaper than the average but need to be changed twice a year
  • No pre-filter, which could have improved the HEPA’s lifespan
Overview

To summarize, this silent model can keep your basement free of smells and allergens, so it is a great pick for users who are afflicted by allergies. Although it is suitable more for tight spaces, it will do a tremendous job, thanks to the performant sensor that permanently keeps an eye on the pollution level. Plus, it can connect to your phone through WiFi and allows you to activate Alexa.


4. Honeywell 50250-S – Best for Odor Removal


Specifications:
  • Room Coverage: 390 sq. ft.
  • Speed Settings: Low, Medium, High
  • Filtering System: Activated Carbon & True HEPA Filter; PlasmaTRUE Technology
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: 250
  • Rated Power: 170W

  • Noise Level: Low to Moderate
  • Air Change Rate: 5+/hour
  • Auto Mode:
  • Filter Life: 9-12 months
  • Timer:
  • Warranty: 5-year


Able to cover medium-size areas, measuring up to 390 sq ft, Able to cover medium-size areas, measuring up to 390 sq ft, it will purify the air faster and more efficiently due to smart design that provides a more generous air-intake. It features a great 250 cfm CADR and comes with high-end filters, therefore it is competitive in removing microscopic mites and smells. A pre-filter is incorporated as well to cage large allergens like lint or hair and improve the life of the primary filters, which can last up to 1 year. Moreover, it features 3 fan modes, so you can manually alter the airflow, but the auto function will save you a lot of trouble, as it can monitor the degree of contamination and automatically customize the fan to cope with it.

If used in the recommended space, it will rotate the air up to five times per hour, thus preventing bacteria and particle build-up and maintaining fresh, smell-free air. The noise remains within decent limits, while the power consumption rate doesn’t go higher than 170 watts. Besides that, it comes with a timer option, so you can program it to turn off after a while, and, thus, save energy.

Regarding its constructions, we have only good things to say, as it is built of strong plastic and comes with superior-quality electric circuits that will stand the test of time. Additionally, it is covered by a great 5-year warranty, which is offered by a renowned manufacturer, so you can trust that no matter the problem you encounter, it will be quickly solved.

What we like:
  • Excellent filter lifespan is increased by the washable pre-filter
  • SurroundSeal technology guarantees that all the air that enters the unit will come out clean
  • Adjustable fan speed allows you to control noise level and energy consumption
What we dislike:
  • The design requires for it to be placed far from the wall, so it may get in the way
  • A bit noisy on the highest setting
Overview

Although bulkier than other models, it compensates through performance and style, and we don’t doubt that you will find a good place for it in your basement. It is equipped with a filter that relies on activated carbon to neutralize odors, so it will easily neutralize the stench of mold and damp air from your basement. Nevertheless, the smell is a sign that you are confronting with a problem with mold that can be produced by excessive humidity, and, in this case, you will have to add a dehumidifier as well.


3. Fellowes AeraMax 300 – Editor’s Choice


Specifications:
  • Room Coverage:600 sq. ft.
  • Speed Settings: 4
  • Filtering System: Activated Carbon & True HEPA Filter
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: Dust: 196 Pollen: 188 Smoke: 191
  • Rated Power: 86W

  • Noise Level: 27 – 58 dB
  • Air Change Rate: 3-5/hour
  • Auto Mode:
  • Filter Life: HEPA: 12 months; Carbon: 3 months
  • Timer:
  • Warranty: 3-year


A beautifully-designed high-end option, it caught our eye with its user-friendly digital controls and super-quiet performance. It features a clean air delivery rate of 196 CFM for dust, 188 CFM for pollen, and 191 CFM for smoke, and can operate with maximum success in basements that measure between 300 and 600 sq ft. The air goes through 3 performant filters, and in the end, through the ionized field created by the PlasmaWave technology, which clears it of germs. Thus, it offers not only purification but sanitation of the air.

The noise level won’t overcome 58 decibels, while the energy consumption will remain under 86 watts, so you can trust that it is neither a source of distraction nor an energy-drainer. Furthermore, you will put aside the money on filters, as the main layer has a good 1-year lifespan, and the less expensive carbon can last for up to 3 months of utilization.

The air circulation rate variates with the dimensions of the space, but it remains performant, as long as you use it in a medium-size room, where it will circulate the air from 3 to 5 times in 60 minutes, lowering the risk of bacteria build-up. Additionally, the auto function can scan the air for floating particles and modify the fan velocity, which can be customized manually as well, if you consider that it should run faster or slower. Last but not least, we should mention the warranty, which offers up to 3 years of coverage for parts and labor.

What we like:
  • Sleek and quiet design
  • Great airflow for medium-size basements
  • Long-lasting HEPA filter
  • Digital controls
What we dislike:
  • A bit noisier on the highest speed
  • Filters are rather expensive
Overview

We have picked it as our favorite, not only for its looks but for its outstanding efficiency in removing smells, and tiny particles. It comes with good area coverage and a fair price. Moreover, it is more compact than other models with the same performance, therefore you will get more space for your stuff.


2. Coway Airmega 300 – Best for Large Basements


Specifications:
  • Room Coverage: 1,256 sq. ft.
  • Speed Settings: Sleep, Low, Medium, High
  • Filtering System: Max2 filter: Activated Carbon & True HEPA Filter
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns; 99% of volatile organic compounds
  • CADR: 350
  • Rated Power: 56W

  • Noise Level: 22-52 dB
  • Air Change Rate: 2-4/hour
  • Auto Mode:
  • Filter Life: 12 months
  • Timer:
  • Warranty: 5-year


If you look at it and think it is too bulky, you might want to reconsider your perspective, as this unit was designed to cover large spaces, measuring up to 1,256 sq ft, so it will definitely not get in your way if you place it in a large basement. Moreover, along with its large size comes better performance, as it can offer a higher airflow and a huge CADR of 350 cfm. The system is effective, as it incorporates both a HEPA and a carbon layer, guarded by a permanent pre-filter. It offers a multitude of functions as a timer, an Auto function, 5 manual fan modes, and dual suction. Not to mention that the filter can last for up to 1 year, and the system is backed by an excellent 5-year parts-and-labor warranty.

On the other side, some values remain low, and this is great. It is Energy Star verified and requires only 56 watts to run on the maximum speed level. The noise is decent as well, and almost unnoticeable on the lowest settings, as it ranges between 22 and 52 decibels. However, it is rather heavy.

What we like:
  • Excellent room coverage
  • Dual-suction design increases speed and efficiency
  • Reduced consumption
What we dislike:
  • Bulky design
  • It doesn’t feature wheels so moving it around can be a challenge
Overview

To summarize, if you are looking for a unit that can deal with air problems in your large basement, this is the best. Huge CADR and strong filters guarantee fast purification. Plus, you won’t have to keep an eye on its activity, as it comes with an auto setting that adjusts fan velocity according to the level of pollution in the room.


1. Alen BreatheSmart-FreshPlus – Best Overall


Specifications:
  • Room Coverage: 1,100 sq. ft.
  • Speed Settings: Low, Medium, High, Turbo
  • Filtering System: True HEPA-FreshPlus Filter
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: 300
  • Rated Power: 105W

  • Noise Level: 41.5 – 56 dB
  • Air Change Rate: 2+/hour
  • Auto Mode:
  • Filter Life: 9-12 months
  • Timer:
  • Warranty: Limited Lifetime


Designed by the NASA airflow engineers, this model is the best you can get at the moment, as it manages to combine looks with customization, performance, and convenience and deliver only crisp air which will go through its filters at least 2 times/60 minutes. It is a large unit but super quiet, with a sound level ranging between 41.5 decibels, on the lowest speed, and 56 dB, at maximum speed.

Customizable Filtering

It has a room coverage power of 1,100 sq. ft., therefore it is compatible with large basements, where it can do an outstanding job. Nevertheless, the great thing about this model is that it offers specialized filters, which are better at solving specific problems than universal filters. They are all HEPA-based with a filtering efficiency of 99.97% for particles that are larger or equal with 0.3 microns but include other components as well, designed to fight either fumes/smoke, odors, or germs.

  • HEPA PURE – the basic filter, incorporates multiple HEPA layers and is fast in catching pollen, dust mites, and pet hair and dander, being suitable for allergy sufferers
  • HEPA ODORCELL – great for pet owners, this variant mixes 3 different layers to thoroughly free the house of unpleasant odors
  • HEPA FRESH PLUS – with an outstanding action against fumes, persistent smoke, and odors produced by cooking, this filter incorporates a pre-filter, a HEPA PLUS, and a carbon-based filter
  • HEPA SILVER – it combines a pre-filter, a HEPA, and a Silver filter to trap and kill harmful microorganisms

Good to know, the unit arrives with the basic HEPA PURE filter, so you will have to spend extra money if you wish to use another option. Nonetheless, we guarantee that your money will be well-spent, as none of the models tested by us can reach this unit’s performance. Plus, the filter mix lasts up to 1 year, so you will only have to replace it once a year.

Smart Sensor Technology

A beautifully-designed digital control panel allows you to pick among the 5 speeds, set the timer or activate the auto setting which is guided by a last-generation sensor, which constantly scans the level of air pollution in the room and displays it through 3 bright colors:

  • Blue – high air quality
  • Orange – medium air quality
  • Red – poor air quality

The auto function reads the data and increases or lowers the fan velocity accordingly so the problem can be solved quickly and with the maximum energy efficiency.

What we like:
  • Customizable filter options
  • Excellent warranty
  • Smart sensor
  • Auto function
What we dislike:
  • Filers are expensive
  • It can get a bit loud on the high and turbo speeds
Overview

It is built only of high-quality materials, with strong electric circuits that will pass the test of time, therefore you trust that this is an excellent long-term investment. Plus, the limited lifetime warranty backs it up for any issue that may occur during normal utilization.


Top 7 Comparison

Photo Products Price
Alen BreatheSmart-FreshPlus Image
Best Overall
1. Alen BreatheSmart-FreshPlus
  • Room Coverage: 1,100 sq. ft.
  • Speed Settings: Low, Medium, High, Turbo
  • Filtering System: True HEPA-FreshPlus Filter
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: 300
  • Rated Power: 105W
Coway Airmega 300 Image
Best for Large Basements
2. Coway Airmega 300
  • Room Coverage: 1,256 sq. ft.
  • Speed Settings: Sleep, Low, Medium, High
  • Filtering System: Max2 filter: Activated Carbon & True HEPA Filter
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns; 99% of volatile organic compounds
  • CADR: 350
  • Rated Power: 56W
Fellowes AeraMax 300 Image
Editor’s Choice
3. Fellowes AeraMax 300
  • Room Coverage:600 sq. ft.
  • Speed Settings: 4
  • Filtering System: Activated Carbon & True HEPA Filter
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: Dust: 196 Pollen: 188 Smoke: 191
  • Rated Power: 86W
Honeywell 50250-S Image
Best for Odor Removal
4. Honeywell 50250-S
  • Room Coverage: 1,100 sq. ft.
  • Speed Settings: Low, Medium, High, Turbo
  • Filtering System: True HEPA-FreshPlus Filter
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: 300
  • Rated Power: 105W
LEVOIT LV-PUR131 Image
Best for Allergies
5. LEVOIT LV-PUR131
  • Room Coverage: 360 sq. ft.
  • Speed Settings: Low, Medium, High
  • Filtering System: Activated Carbon & True HEPA Filter
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: 135+
  • Rated Power: 40W
Winix 5500-2 Image
Best for the Money
6. Winix 5500-2
  • Room Coverage: 360 sq. ft.
  • Speed Settings: Low, Medium, High
  • Filtering System: Activated Carbon & True HEPA Filter; WINIX PlasmaWave Technology
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: Dust: 243, Smoke: 232, Pollen: 246
  • Rated Power: 57W
Germ Guardian AC4825 Image
Best for Small Basements
7. Germ Guardian AC4825
  • Room Coverage: 167 sq. ft.
  • Speed Settings: Low, Medium, High
  • Filtering System: Activated Carbon & True HEPA Filter; UV Light
  • Filtering Efficiency Rate: 99.97% of airborne particles down to 0.3 microns
  • CADR: Dust: 118 Pollen: 125, Smoke: 108
  • Rated Power: 56W

Conclusion

As you have noticed, we have paid good attention to choosing our models. We have carefully looked into price, costs, features, and specifications and picked only the models that can match the highest standards of safety and efficiency, so you can rest assured that no matter which one you pick, you will make a good decision. Nevertheless, now it’s time for you to think about your needs and consider the size of your basement and your budget.

Best Air Purifier for Basement on the Market: Alen BreatheSmart-FreshPlus

The best of the best, this sleek unit will keep your basement fresh and safe for many years to come. It is easy to operate, due to the user-friendly control panel and auto function. It comes with a multi-layer HEPA filter, specially designed to increase comfort for allergy sufferers, but it allows you to choose other Alen filter combinations, depending on if you are struggling to neutralize smokes, odors or germs. Plus, although it is pretty large, it is quiet and energy-efficient, with a power consumption rate of only 105 watts.

Editor’s choice: Fellowes AeraMax 300

Designed to cover medium to large rooms, it has great airflow and comes with a 3-filter system and an extra PlasmWave function to fight pollution in multiple fields. If the HEPA is already renowned for its efficiency against small particles, the activated carbon filter will capture and neutralize odors, while the PlasmaWave won’t let any germ or bacteria contaminate the air in your basement. It is quiet and energy-efficient and features an Auto mode for easy air-quality control.

Best Air Purifier for Large Basements: Coway Airmega 300

It can easily cover large spaces, this is the one to go with if your basement measures over 1,200 square feet. It is produced by a renowned brand in the industry that has put good care in designing and manufacturing it, paying attention to details. Along with a powerful set of filters, it comes with a timer and a smart sensor that will measure and display the quality of the air.

Best Air Purifier for Small Basements: Germ Guardian AC4825

A popular model, Germ Guardian AC4825 seems to be an excellent solution in any situation. Its compact design makes it easy to transport from room to room so you can always place it where it is most needed. Plus, it comes at an excellent price without cutting a bit in quality and functions, so don’t be surprised when you discover that it has a smart sensor and an auto mode.

Best Air Basement Purifier for Odor Control: Honeywell 50250-S

With a 360-degree air intake design, it is faster than most models on the market, and this is reflected in its huge air change rate, as it can circulate the air over 5 times in an hour. It is equipped with a long-lasting HEPA filter and a super-efficient carbon filter that can fight even the most persistent odors. Plus, it constantly analyzes the air quality and automatically adjusts the fan, but it offers 3 manual fan settings as well, so you can pick the one that best suits your preferences.

Trystan Jensen
Trystan Jensen
Trystan is a trusted reviewer who has extensive experience in customer satisfaction gained while he worked as a market research analyst. He is well aware of what consumers want, as well as what they expect the most from the acquisitions they make. It is his personal interest in technologies that help improve life quality combined with his attentiveness to detail and customer experience that make Trystan an unending source of qualitative content.