How to Determine the Right Size Air Purifier For A Room?

18 minutes read

To determine the right size air purifier for a room, you should consider the square footage of the room and the Clean Air Delivery Rate (CADR) of the air purifier. Measure the dimensions of the room and calculate the square footage. Look for an air purifier that is designed to handle the square footage of your room. The CADR rating of an air purifier indicates the volume of clean air that the purifier can produce. Select an air purifier with a CADR rating that is suitable for the size of your room. Keep in mind that larger rooms may require multiple air purifiers or a single air purifier with a higher CADR rating.

Best Air Purifiers of October 2024

1
Honeywell HPA200 HEPA Air Purifier for Large Rooms - Microscopic Airborne Allergen+ Reducer, Cleans Up To 1500 Sq Ft in 1 Hour - Wildfire/Smoke, Pollen, Pet Dander, and Dust Air Purifier – Black

Rating is 5 out of 5

Honeywell HPA200 HEPA Air Purifier for Large Rooms - Microscopic Airborne Allergen+ Reducer, Cleans Up To 1500 Sq Ft in 1 Hour - Wildfire/Smoke, Pollen, Pet Dander, and Dust Air Purifier – Black

  • LARGE ROOM AIR PURIFIER - Honeywell HPA200 HEPA Air Purifier helps provide fresher, cleaner air in minutes. Cleans up to 1500 sq ft in 60 mins (1 ACH), for powerful large room coverage. Provides 4.8 air exchanges per hr in AHAM suggested room size of 310 sq ft
  • HELPS REDUCE AIRBORNES - This HEPA air purifier has 3 air cleaning levels including Turbo Clean. It helps capture the following microscopic airborne particles: dirt, pollen, pet dander, and smoke.
2
LEVOIT Air Purifier for Home Allergies Pets Hair in Bedroom, Covers Up to 1095 ft² by 45W High Torque Motor, 3-in-1 Filter with HEPA sleep mode, Remove Dust Smoke Pollutants Odor, Core300-P, White

Rating is 4.9 out of 5

LEVOIT Air Purifier for Home Allergies Pets Hair in Bedroom, Covers Up to 1095 ft² by 45W High Torque Motor, 3-in-1 Filter with HEPA sleep mode, Remove Dust Smoke Pollutants Odor, Core300-P, White

  • A 45W long-life high-torque motor, a versatile 8.7" x 8.7" x 14.2" size, a 7.48 lb weight, a 141CFM CADR and up to 219 ft² of purification area for original filter. Levoit Original Filter is HEPA-grade while operating in Sleep Mode, as tested by an independent lab
  • 𝐅𝐈𝐍𝐃 𝐑𝐄𝐋𝐈𝐄𝐅: Our filter has a strong filtration performance of ultrafine particles. 99.97 percent filtration efficiency for 0.1~0.3μm airborne particulates, including pollen, dust, and animal dander allergens.Tested by an independent lab
  • 𝐎𝐅𝐅𝐈𝐂𝐈𝐀𝐋 𝐋𝐄𝐕𝐎𝐈𝐓 𝐅𝐈𝐋𝐓𝐄𝐑𝐒: Search for B07RSZSYNC to find Levoit's replacement filter for Core 300-P air purifier, Model No.: Core 300. Levoit filters provide the best fit and filtration, while off-brand filters are unreliable and may damage the air purifier
  • 𝐖𝐇𝐈𝐒𝐏𝐄𝐑 𝐐𝐔𝐈𝐄𝐓 𝐀𝐈𝐑 𝐂𝐋𝐄𝐀𝐍𝐄𝐑: Choose Sleep Mode at night and then forget all about your air purifier while you sleep. QuietKEAP Technology reduces noise levels to a near-silent 24dB in sleep mode, ensuring it won't get in the way of a good night's rest
3
Air Purifiers for Home Large Room up to 1740sq.ft, LUNINO H13 HEPA Air Filter with PM 2.5 Display Air Quality Sensors, Aromatherapy Function, Air Cleaner for Dust, Smoke, Dander, Pets Hair, Pollen

Rating is 4.8 out of 5

Air Purifiers for Home Large Room up to 1740sq.ft, LUNINO H13 HEPA Air Filter with PM 2.5 Display Air Quality Sensors, Aromatherapy Function, Air Cleaner for Dust, Smoke, Dander, Pets Hair, Pollen

  • 【High Efficiency HEPA Air Purifier】LUNINO H13 HEPA air purifiers for home can effectively captures 99.97% of airborne contaminants, including pet hair, smoke, PM 2.5 and bad smells. This large room air purifiers coverage area up to 1740 sq ft, fits in different spaces like bedrooms, living rooms, offices, nurseries, basements and kitchens. It is the best choice for anyone who wants to improve air quality.
  • 【5 Fan Modes & Night Light】LUNINO air purifier for home has 5 fan speed mode (Sleep/Auto/Low/Med/High), you can adjust fan speeds according to your needs to achieve the best effect. Sleep mode is very quiet and the noise as low as 15dB, let you enjoy fresh air as you sleep sweetly. The soft night light can prevents falls and can be turned off for a perfect night's sleep.
  • 【Aromatherapy & Child Lock】Add a few drops of your favorite essential oil to the aromatherapy pad on top of the air purifier for home to give a room a pleasant scent or mask a bad odor. The considerate child lock design can prevent your baby from being injured and prevent accidental touching and arbitrary changes in settings.
4
LEVOIT Air Purifiers for Home Large Room Up to 1800 Ft² in 1 Hr with Washable Filters, Air Quality Monitor, Smart WiFi, HEPA Sleep Mode for Allergies, Pet Hair, Pollen in Bedroom, Vital 200S-P, White

Rating is 4.7 out of 5

LEVOIT Air Purifiers for Home Large Room Up to 1800 Ft² in 1 Hr with Washable Filters, Air Quality Monitor, Smart WiFi, HEPA Sleep Mode for Allergies, Pet Hair, Pollen in Bedroom, Vital 200S-P, White

  • 𝐅𝐎𝐑 𝐀𝐋𝐋 𝐓𝐇𝐄 𝐀𝐈𝐑-𝐁𝐑𝐄𝐀𝐓𝐇𝐈𝐍𝐆 𝐏𝐄𝐓 𝐋𝐎𝐕𝐄𝐑𝐒: Filter pet hair and odors from your air while saving energy, if you open Pet Mode which is only controlled in the Vesync app. Thanks to this mode which alternates between high and medium fan speeds
  • 𝐇𝐈𝐆𝐇𝐄𝐑 𝐀𝐈𝐑 𝐈𝐍𝐓𝐀𝐊𝐄: Purify your air quickly. With a traditional air inlet and the additional U-shaped air inlet, airborne pet hairs and odors can easily be trapped without causing clogs
  • 𝐋𝐀𝐑𝐆𝐄 𝐂𝐎𝐕𝐄𝐑𝐀𝐆𝐄: The Vital 200S-P is perfect for large, indoor spaces, especially large bedrooms. It has a CADR of 242 CFM and can purify the air of a 1800 ft² space once/hour (based on Levoit's Original Filters; not applicable to other replacement filters)
  • 𝐇𝐄𝐏𝐀 𝐒𝐋𝐄𝐄𝐏 𝐌𝐎𝐃𝐄: When in Auto Mode, the Vital 200S-P will automatically adjust the fan speed to protect your air quality while you rest. Levoit Original Filter is HEPA-grade while operating in Sleep Mode, as tested by an independent lab
5
POMORON Air Purifiers for Home Large Room Up to 1076Ft² with Air Quality Sensor&Auto Mode, UV Light, Efficient HEPA Air Purifiers Filter 99.97% of Pollen Allergies Smoke Pet Dander for Bedroom, White

Rating is 4.6 out of 5

POMORON Air Purifiers for Home Large Room Up to 1076Ft² with Air Quality Sensor&Auto Mode, UV Light, Efficient HEPA Air Purifiers Filter 99.97% of Pollen Allergies Smoke Pet Dander for Bedroom, White

  • High Performance-For Large Room Up to 1076Ft²: POMORON Model MJ005H air purifier for home is designed with high performance air duct, significantly improves purification speed for large room. It can purify a 1076 ft² room 1 time an hour and a 215 ft² room 5 times per hour, rapidly fill up your room with tons of fresh air.
  • Air Quality Display & Smart Auto Mode: Equipped with a PM2.5 sensor, our MJ005H air purifier can monitor the real-time air quality and display precise PM2.5 readings. In Auto Mode, it can adjust its operation speeds according to the air quality. When the air quality drops, the indicator light will turn yellow or red and the fan will automatically speed up to clean the air faster, creating a healthy living environment for you and your family.
  • UV Dual Purification: Our air purifier for large room has a built-in UV module, which can further eliminate the harmful substance in the air and suppress their development inside the machine and filter cartridge.
6
Winix 5500-2 Air Purifier with True HEPA, PlasmaWave and Odor Reducing Washable AOC Carbon Filter Medium , Charcoal Gray

Rating is 4.5 out of 5

Winix 5500-2 Air Purifier with True HEPA, PlasmaWave and Odor Reducing Washable AOC Carbon Filter Medium , Charcoal Gray

  • True HEPA filter captures 99.97% of airborne pollutants; dust mites, pet dander, pollen and other allergens as small as 0.3 microns
  • Washable AOC Carbon Filter, made from activated carbon granulars for removal of household odors. Decibels 27.8 dB
  • PlasmaWave acts as a permanent filter to safely break down odor, allergens, chemical vapors and other pollutants with no harmful ozone
  • Smart Sensors gauge the air and our Auto Mode adjusts the fan to filter the air as needed; with a sleep mode for silent night time operation
7
LEVOIT Air Purifiers for Home Large Room Bedroom Up to 1110 Ft² with Air Quality and Light Sensors, Smart WiFi, Washable Filters, HEPA Sleep Mode for Pets, Allergies, Dust, Pollon, Vital 100S-P, White

Rating is 4.4 out of 5

LEVOIT Air Purifiers for Home Large Room Bedroom Up to 1110 Ft² with Air Quality and Light Sensors, Smart WiFi, Washable Filters, HEPA Sleep Mode for Pets, Allergies, Dust, Pollon, Vital 100S-P, White

  • 𝐏𝐄𝐓 𝐎𝐖𝐍𝐄𝐑𝐒 𝐅𝐑𝐈𝐄𝐍𝐃𝐋𝐘: Pet Mode cleans the air and conserves energy, while the wide U-shaped air inlet effectively traps airborne pet fur and large particles
  • 𝐂𝐎𝐌𝐏𝐀𝐂𝐓 𝐅𝐎𝐑 𝐄𝐕𝐄𝐑𝐘 𝐇𝐎𝐌𝐄: Experience instant freshness with the Vital 100S-P Air Purifier. It boasts a 143 CFM CADR and cleanses 1100 ft² of space hourly with Levoit's Original Filters (not compatible with other replacement filters)
  • 𝐇𝐈𝐆𝐇 𝐏𝐄𝐑𝐅𝐎𝐑𝐌𝐀𝐍𝐂𝐄: Our filter offers powerful filtration, with 99.97 percent efficiency in capturing ultrafine particles sized 0.1-0.3μm, such as pollen, dust, and pet dander allergens. Disclaimer: Independently lab-tested
  • 𝐇𝐄𝐏𝐀 𝐒𝐋𝐄𝐄𝐏 𝐌𝐎𝐃𝐄: With Light Detection, Vital 100S-P dims display lights and sets Auto Mode to quiet fan speeds in darkness. Levoit Original Filter achieves HEPA-grade filtration in Sleep Mode, independently tested
8
LEVOIT Air Purifiers for Bedroom Home, 3-in-1 Filter Cleaner with Fragrance Sponge for Sleep, Smoke, Allergies, Pet Dander, Odor, Dust, Office, Desktop, Portable, HEPA at Speed Ⅰ, Core Mini-P, White

Rating is 4.3 out of 5

LEVOIT Air Purifiers for Bedroom Home, 3-in-1 Filter Cleaner with Fragrance Sponge for Sleep, Smoke, Allergies, Pet Dander, Odor, Dust, Office, Desktop, Portable, HEPA at Speed Ⅰ, Core Mini-P, White

  • 𝗥𝗘𝗙𝗥𝗘𝗦𝗛 & 𝗥𝗘𝗟𝗔𝗫: If you struggle with allergies, low-quality sleep, congestion, or symptoms caused by pet dander, the Levoit Core Mini-P Air Purifier is ready to help you create a comfortable space
  • 𝗠𝗔𝗧𝗧𝗘𝗥 𝗢𝗙 𝗠𝗜𝗡𝗨𝗧𝗘𝗦: Breathe freely and sleep better as the air purifier uses 360° VortexAir Technology 3.0 and 3-stage filtration to ensure top-notch air purification, Operating Conditions Temperature: 14°–104°F / -10°–40°C
  • 𝗔𝗥𝗢𝗠𝗔𝗧𝗛𝗘𝗥𝗔𝗣𝗬: Struggling with pet odors or musty smells, Add a few drops of fragrant essential oils to the aroma pad to keep your space smelling great
9
AROEVE Air Purifiers for Home, Air Purifier Air Cleaner For Smoke Pollen Dander Hair Smell Portable Air Purifier with Sleep Mode Speed Control For Bedroom Office Living Room, MK01- White

Rating is 4.2 out of 5

AROEVE Air Purifiers for Home, Air Purifier Air Cleaner For Smoke Pollen Dander Hair Smell Portable Air Purifier with Sleep Mode Speed Control For Bedroom Office Living Room, MK01- White

  • Impressive Particle Filtration: AROEVE air purifier utilizes filter that can effectively filter out particles such as smoke, pollen, dander, hair, and more, potentially improving air quality and promoting better health and well-being for you.
  • High Circulation Rate: With dual-channel and 360-degree air inlets technology, AROEVE air purifier refreshes the air per hour in rooms up to 215 ft² / 20 m², covering every corner of the room to promote better health for you.
  • Low Decibel Operation: AROEVE air purifier operates quietly, especially when the sleep mode is activated, which reduces the fan speed to the lowest setting, effectively eliminating any noticeable sound. The filtered air noise is as low as 22 dB, making it ideal for creating a peaceful and relaxing indoor environment while still providing effective purification.


What factors should I consider when selecting the right size air purifier for a room with open windows?

When selecting the right size air purifier for a room with open windows, consider these factors:

  1. Room size: The size of the room will determine the appropriate capacity of the air purifier. Measure the square footage of the room to determine the appropriate size unit needed.
  2. Airflow: Since the windows are open, the air purifier will be constantly filtering incoming outdoor air. Choose a unit with a higher airflow rate to quickly filter the increased amount of airborne particles.
  3. Filter type: Consider the type of filter used in the air purifier. HEPA filters are effective at capturing small particles, while carbon filters can help reduce odors. Choose a filter type that addresses your specific air quality concerns.
  4. Noise level: If the air purifier will be running frequently with the windows open, consider the noise level of the unit. Look for a quiet model if noise is a concern.
  5. Energy efficiency: Consider the energy efficiency of the air purifier, especially if it will be running for extended periods of time with the windows open. Look for units with low energy consumption to save on electricity costs.
  6. Portability: If you plan to move the air purifier between rooms or areas with open windows, consider the size and weight of the unit for ease of transportation.
  7. Brand reputation: Choose a reputable brand with positive customer reviews and ratings to ensure the air purifier is of high quality and performs effectively in a room with open windows.


What is the minimum square footage an air purifier should cover in a laundry room?

The minimum square footage an air purifier should cover in a laundry room depends on the size of the room and the level of air purifying needed. However, a good rule of thumb is that the air purifier should be able to cover at least the square footage of the room or space in which it is placed. For a small laundry room, a minimum coverage of 100 square feet should be sufficient. However, for larger laundry rooms, a higher coverage area may be needed. It is recommended to choose an air purifier that can cover at least 150-200 square feet for better air purification in a larger laundry room.


What is the best way to determine the right size air purifier for a multi-level home?

The best way to determine the right size air purifier for a multi-level home is to calculate the square footage of each level and then select an air purifier that is capable of covering the total square footage of your entire home. You can also consider the height of ceilings, as taller ceilings may require a more powerful air purifier.


Another factor to consider is the air purifier's Clean Air Delivery Rate (CADR), which measures the volume of clean air that the purifier can produce per minute. Look for an air purifier with a CADR rating that is suitable for the square footage of your home.


Additionally, consider the specific air quality concerns in your home, such as allergies, pet dander, or smoke, and choose an air purifier with the appropriate filters (such as HEPA or activated carbon) to address those concerns.


It is always a good idea to consult with a professional or read reviews to ensure you are selecting the right size air purifier for your multi-level home.

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