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7 Most Energy Efficient Air Purifiers – Reviews & Top Picks 2022

Air purifiers do not function automatically. They often require plugging into the electric socket for them to purify the air in our home and office. While this seems like a good thing, their consumption of energy means additional electricity bills.

That is why selecting an air purifier; you have to choose the best one in terms of energy consumption. Ideally, you should go for an air purifier that consumes less energy and still offer excellent air purification performance.

In this post, we’re going to review 7 best energy efficient air purifiers you can buy for your home or office. You’ll also come away knowing what the top features are to look for in a high-quality air purifier to make the right decision.

There are air purifiers to match every budget and every indoor air quality situation. Scroll down to find in-depth reviews of the top-rated most energy efficient air purifiers and more information

So, dig into the information below to get started.

Our Top Picks

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Best Energy Efficient Air Purifier – 2021 Updated List

Making a list of the top quality and practical energy efficient air purification system 2021 is a tricky task for sure. In fact, the quality vs. cost argument is the first issue you have to deal with.

However, without wasting much of your time, we’re going to make our reviews of 7 top-rated energy efficient air purifiers for your home or office.

Keep reading!

1. RabbitAir MinusA2 SPA-780A White – Best Odor Removal HEPA Air Purifier

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We start off our list of the best energy efficient air purifier models with the RabbitAir MinusA2 SPA-780A White. The device has a manufacturer’s lab-tested rated energy star motor, which consumes less energy.

As a result, it helps you to save on costs throughout the year. This is because of its light sensor, which cuts down on light pollution by defaulting to low energy use when the room is dark.

This most energy efficient air purifier is also highly effective in filtration, which assists in keeping your indoor air clean and fresh. It does this through six stages occurring in the following filters:

Pre-filter- This filter is permanent and easy to wash. It deals with trapping and reducing of large-sized particles, allergens, and dust.

Medium Filter- This is where the second stage occurs. Here, the filter captures and reduces airborne particles that are larger than 1 micron. These particles include mold, pet dander, and pollen.

BioGS HEPA Filter- What happens here is that particles with a size of 0.3 microns are trapped at an efficiency level of 99.97% and minimized to common allergens. In return, this assists the filter to last longer and increases its efficiency.

Customized filter- Comprises four additional filters that trap and reduce germs, toxins, pet dander, and odor. You can set them to fit your needs.

Charcoal Based Activated Carbon Filter- This is the beast of all the filters. It aids in capturing and reducing chemical and household odor thanks to its high grade granular activated carbon.

Negative Ion Generator- This filter releases negative ions to help in freshening the environment for inhaling clean air.

The purification occurs twice an hour when set in the highest fan setting. However, you can easily monitor the quality of the air you are getting from this device because of the highly improvised sensors.

They usually act as filter indicators and thus help in automatically detecting and adjusting the fan setting accordingly.

You can place this in a large room of about 816 square feet as it has a CADR of 200, 193, and 180 on pollen, dust and smoke, respectively.


  • Does not produce noise
  • Very stylish
  • Mountable on the wall
  • Smart light sensor technology
  • Customized filters


  • Quite loud turbo mode

2. LEVOIT Core 300 – Best Air Purifier for Home Allergies and Pets Hair

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This LEVOIT Core 300 purifier has got Energy Star Certification for its low voltage levels in the the improvement of air quality.

Additionally, it is certified by AHAM for CADR of pollen – 145 cmf, smoke – 141cmf and dust – 140 cmf. Note further that this device does purification five times in an hour through the use of its three filters.

You will love its high purification performance guided by three filters:

Pre-filters: Traps and removes the larger particles present in the air.

Activated carbon filter: Reduces the amount of odor from pets, cooking smell and smoke detected in your home air. HEPA filters: Eliminates 99.97% of 0.3 microns of pollutants.

It is easy for you to check and monitor the air quality you are receiving from this Core 300 Levoit using its check filter indicator. It is also this filter indicator that tells you when to replace and wash your filters to continue receiving quality performance.

Moreover, the LEVOIT Air Purifier Core 300 comes with three fan speed setting that operates silently as to give you sleepless nights. It also operates in auto mode which means that it automatically adjusts the fan speed depending on the particles present in the air.


  • Perfect for compact and large spaces
  • Highly durable
  • Comprises a simple to understand manual
  • Avoids pollution
  • High performance
  • Does not produce noise


  • A little costlier than the outgoing model

3. Blueair Blue Pure 121 Air Purifier with Two Washable Filters

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With the usage of 60 watts on the highest fan speed, there is no doubt that this device is the most energy efficient. This low energy consumption levels have led to energy star certification of this Blue Pure 121. However, this is not the only good thing about this air purifier.

The other thing you will love is its high purification performance thanks to its filtration process and CADR Ratings. Primarily, The CADR rating of Blue Pure 121 is 400(cfm) for Dust/ Smoke/ Pollen. It does this through three filters as explained here below: –

Pre-filter: This is where filtration begins, and the two pre-filters perform the function of capturing larger particles like pet hair and dust.

Carbon filter: From the pre-filter, the machine goes on to remove odors of pets, smoke, gases, and cooking smell.

Advanced filters: This helps in capturing and removing 99% of microscopic particles (0.3 microns) present in the air.

Essentially, the air purifier has filter indicators that give you real-time feedback on air quality. They also adjust the fans setting to high, low or medium speed depending on the particles it detects on air. All you have to do is press its one-time design button.


  • Consumes less energy
  • Produces minimal noise
  • High-quality performance
  • Simple to use by pressing the one control button


  • No Integrated air sensors

4. Coway Airmega 400S Smart Alexa Compatible

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Go digital but still get to save on energy using the AIRMEGA AP-2015E (G) Smart Air purifier. This Coway Airmega 400S largest home purification system functions through a combined effort of the pre-filters, activated carbon filter and the True HEPA filter.

Washable pre-filters- Help in capturing of large dust particles.

Activated carbon filter- Removes 99% of volatile organic compounds and fumes including CH3CHO and NHO

True HEPA filter- This filter deals with capturing and reduction of 99.97% of 0.3 micron-sized particles efficiently. These particles include pollutants, pollen and other allergens.

The above filtration leaves you with clean air because it takes place twice in an hour.

However, you can use the device in a large room of up to 1560 square feet for excellent results.

Additionally, this energy efficient air purifier for large spaces comprises five fan setting modes including smart, sleep, low, medium and high.

The smart mode assists in automatically adjusting the fan speed to improve indoor air quality; depending on the kind of air particles in the air.

This blends well with the machine’s pollution sensor that acts as the filter indicator which you can access using a mobile application. They also tell you when replacement and washing of filters are necessary for their efficient functionality. It helps in communicating the air quality and responds by LED ring, which relays information on how dirty or clean your room is.

The best part about this large home purification system is that it does all this under Energy star certification since it consumes only 64 watts. It also has a verified CADR by AHAM.


  • High performance
  • Allows control using your phone
  • Low consumption of energy
  • Minimal noise production while functioning
  • Advanced technology


  • Perfect for large rooms only
  • Filters replacement cost bit high

5. Honeywell HFD-120-Q – QuietClean Oscillating Air Purifier

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Breathe clean air without spending a lot on electricity using the Honeywell HFD-120-Q QuietClean. This quiet energy efficient air purifier offers a high level of purification guided by its three filters:

Pre-filter: Traps and removes 99% of larger particles of around 2 microns

Activated carbon filter: Captures and reduces odor and chemical levels within the air.

HEPA filter: Gathers and eliminates the tiniest (0.3 microns) of airborne allergens by 99.97%.

All the action takes place under low energy consumption, thereby winning Energy Star Certification for

this Honeywell QuietClean Oscillating Air Purifier.

Moreover, the purification occurs five times in an hour thanks to its AHAM certification of CADR rated at Pollen 132, Dust 110 and Smoke 100.

Since the filters are permanent, it means that they do not require replacement and hence low maintenance cost of the Honeywell HFD-120-Q. Its filter indicator tells you when you need to wash the filters to enhance their efficiency.


  • Saves on energy
  • Low maintenance
  • High-quality performance
  • Additional odor removal filters
  • Build to last
  • Minimal noise under a low and medium setting


  • At the first use, it emits plastic smell

6. Envion Therapure Tpp240 Permanent HEPA Type Air Purifier

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Apart from being Energy Star certified, three other reasons will make you want to have this best energy efficient home air purifier. The first one deals with functionality.

The Therapure TPP240 has a triple action purification system operating through the pre-filter, carbon activated filter and the HEPA filter.

The combined effort of these filters helps in eliminating 99.97% of 0.3 microns of pollen, dust and smoke. The odors are however captured and removed by the activated carbon filter.

Its purification occurs in medium to large size spaces as the CADR Rating of dust, pollen and smoke are 138, 147 and 123 respectively.

Due to the revolutionary technology, the Therapure air purifier TPP240 ensures that along with airborne particles, no pollution occurs during the circulation.

Secondly, the unit is low maintenance as it features cleanable filters. Therefore, you will save on cost as no replacement of filters is involved. It is also easy for you to know when to clean the filters as the machine comprises a clean filter timer.

Thirdly, there are filter indicators to inform you about the kind of air quality you are receiving. They also assist you in knowing the replacement and cleaning time of the filters because of the alerts that they give.

Moreover, this energy efficient room air purifier has a three-speed fan that operates silently on auto mode. Thanks to the automatic twenty-four-hour time, you will not have difficulties handling this TPP240 Therapure, whether you have previous experience or not.


  • Thorough in performance
  • Low maintenance
  • Energy Star Certified
  • Operates silently
  • Uses advanced technology
  • Simple to use


  • Not suitable for small rooms

7. Bissell air400 – High Efficiency Quiet Bedroom Air Cleaner for Allergies

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Do you have a room of 400 square feet? That means you need an air purifier that will clean the air at least three times in an hour. To achieve this, we recommend Bissell air400 – High efficiency Quiet Bedroom Air cleaner because of this machine functions efficiently without compromising on energy.

Firstly, this air purifier is an energy star rated as it only uses 75 watts on its highest setting. That means that with this quiet bedroom air purifier, you easily get to save on electricity bills. Secondly, it has filter indicators that work using its smart circulatory system.

As a result, it is easy for you to monitor and adjust your air quality. Thirdly, it has a powerful filtration performance which works through three stages with distinct filters mentioned hereunder: –

Pre-filter – which assists in lowering the saturation level of HEPA filter for efficiency. It is washable, and so you can wash it to enhance its performance.

Carbon filter – that easily captures the odors of pollutants such as smoke, VOCs, and pets.

High efficiency filter- which is charged with the capture of microscopic particles such as dust, pollen, smoke and pet dander to the tune of 99.97%

However, there is a challenge in maintenance since the cost is a bit high. This is because of the need to replace filters that is fortunately done twice per year.


  • Efficient and thorough
  • Consumes less energy
  • Indicates air quality
  • Operates silently
  • Automatically adjusts sensors and airflow


  • Maintenance cost is a bit high

Buying Guide

The cost has for the longest time been a factor that people consider while buying an air purifier. That is why you opt for an air purifier with low energy consumption to avoid additional aftermath costs.

Although this is not bad because you could be working on a budget, this is not the only factor you have to keep in mind before purchasing your air purifier. There are other factors you have to consider. The essential ones are as listed and explained below:


Coverage refers to the area where your air purifier should occupy. Depending on the functionality of the device, room area and size of the device, you should be able to choose the correct air purifier.

Some air purifiers are good for large rooms, while others are perfect for small rooms. You need to check on this using weight, room size and size of the device to ensure that airflow will be enough to enhance purification when the air purifier is fixed in the specific area.

CADR Rating

In the simplest of terms, CADR Rating is the Clean Air Delivery Rate. It is measured in cubic feet per minute and becomes used in measuring smoke, pollen and dust removal. The Association of Home Appliance Manufacturers usually certifies the correct one.

While buying an air purifier, go for one that has a high CADR Rating. This is because the higher the CADR, the more powerful the machine is because it can capture and remove a higher amount of particles. However, when the CADR Ratings are low, only a few particles are captured and removed from the air.

Energy Star Certification

Especially when you want to cut down on cost, you have all the reasons in the world to consider the Energy Star Certification. The certification is there to show that the machine has low voltage operation needs.

An air purifier with a low voltage power means that it consumes little amount of energy, that is why it is energy star certified.

However, you may miss seeing the voltage level but this is not something to worry about as long as you see the energy star certification. This is because the certification equally means that the device is conscious of the amount of energy it uses.

Filter Type

Although there are various filters in the market, they perform distinct functions. Some are for removing particles while others are for the removal of smoke and odor. A different type deals with the elimination of chemicals while others remove gases.

There are ideally four types of air purifier filters. They include the HEPA, ion filtration, carbon filtration and ultraviolet filtration filters. HEPA is good for eliminating airborne contaminators, while the ion filtration filters are best for removing ions in contaminants.

On the other hand, Carbon filtration filters are suitable for chemicals and odors whereas UV filters are ideal for viruses. It is therefore necessary to know the type of filter and the role they play before buying since you may end up buying the right machine for the wrong purpose.

Filter Quality

The main reason why you want to purchase an air purifier is to have it serve its purpose. For example, if you are not enjoying clean air due to particles, you want the air purifier to eliminate the particles.

In short, what you are looking for is the quality of the filter, and you can easily tell this by checking the performance of the machine.

A machine that indicates that it can eliminate 99.9% of unwanted particles means that it is a high-quality material as it will serve its purpose to the fullest. Although you also need to look at the durability as it’s a measure of quality.

Filter life indicator

You are not a genius. That means you cannot automatically tell the number of particles a machine is removing. You can also not tell the amount of clean air you are receiving automatically and these are the things that you need in an air purifier.

That is why you have to consider the filter life indicator before buying an air purifier. Always go for an air purifier that has a long filter life indicator. This is because the device will show you the amount of clean air you have for a long period.


The other factor you want to consider before buying an air purifier is maintenance. Here, what we are talking about is the maintenance cost. Of course machines just like humans are not designed to last forever.

However, going for one with high quality is an assurance of low maintenance. This is because you will not have to spend the better part of your days taking your machine for repairs. Unfortunately, machines with low maintenance costs tend to be a little bit expensive.

This needs not to worry you though, because you only spend once and forget about other additional expenses. Also, avoid going for air purifiers that require frequent replacement of filters. This is because air purifiers which require filter replacement often are a sign that they are high maintenance devices as you will have to spend money on them for this expense.

Fan setting

Always consider the fan setting while buying an air purifier. Some of the purifiers come with automatic fan settings. Others come with manual fan settings. Fan settings adjust automatically depending on particles in the surrounding air; while on auto mode.

On the other hand, you will require knowledge to know when to adjust the fan setting while using the machines with manual fan settings. Always go for the automatic fan setting air purifiers.

They save you the hustle of monitoring the surroundings and changing from your location each time for fan settings. Also, do not buy an air purifier that does not have different levels of fan settings.

Noise level

Admit it! You are not going to use your air purifier during the day alone. There is a high possibility that you will use it during the night, especially if it has become designed to help an asthma patient. With that in mind, you do not want a purifying device that will keep making noise.

This is because the device will interfere with the sleep of the people in the house. That is why you have to ensure that under the high and low fan setting, a machine operates silently before you add it to your list.

Additionally, air purifiers with silent operations under both high and low settings are suitable for use during the day and at night.


No matter you’re looking for the Best budget energy efficient air purifiers for your home or office, we hope these models are exactly what you’re looking for.

While you can choose any of the above air purifiers to save on energy, you also want to consider your needs. For example, if you are asthmatic, you want to consider the best energy-efficient air purifier that is also perfect in the purification of airborne contaminants.

This is because it is the airborne contaminants such as dust and pollen that block an asthmatic patient from enjoying the fresh air. The other things you have to consider are as explained above.

As long as you have put these features into consideration plus your personal needs, you can trust that you will select an air purifier that will satisfy all your needs from the energy-efficient air purifier review above.

Thanks for reading our energy efficient air purifier reviews

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