Skip to main content
St Louis

Back to all posts

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

Published on
4 min read
How to Determine the Right Size Air Purifier For A Room? image

Best Air Purifiers to Buy in March 2026

1 LEVOIT Air Purifier for Home Allergens Pet Hair in Bedroom, Covers Up to 1073 ft² by 56W High Torque Motor, AHAM VERIFIDE, 3-in-1 Filter with HEPA Sleep Mode, Remove Dust Smoke Odor, Core300-P, White

LEVOIT Air Purifier for Home Allergens Pet Hair in Bedroom, Covers Up to 1073 ft² by 56W High Torque Motor, AHAM VERIFIDE, 3-in-1 Filter with HEPA Sleep Mode, Remove Dust Smoke Odor, Core300-P, White

  • AHAM VERIFIED FOR PROVEN PERFORMANCE & RELIABILITY IN AIR QUALITY.

  • WHISPER-QUIET OPERATION: SLEEP MODE AT JUST 24DB FOR PEACE.

  • HIGH-EFFICIENCY HEPA-GRADE FILTRATION CAPTURES 99.97% OF ALLERGENS.

BUY & SAVE
$84.95 $99.99
Save 15%
LEVOIT Air Purifier for Home Allergens Pet Hair in Bedroom, Covers Up to 1073 ft² by 56W High Torque Motor, AHAM VERIFIDE, 3-in-1 Filter with HEPA Sleep Mode, Remove Dust Smoke Odor, Core300-P, White
2 LEVOIT Air Purifiers for Bedroom Home Dorm, AHAM Verified, 3-in-1 Filter Cleaner With Aroma Pad, Filters Smoke, Allergens, Pet Dander, Odor, Dust, Office, Desktop, Core Mini-P, White

LEVOIT Air Purifiers for Bedroom Home Dorm, AHAM Verified, 3-in-1 Filter Cleaner With Aroma Pad, Filters Smoke, Allergens, Pet Dander, Odor, Dust, Office, Desktop, Core Mini-P, White

  • ELIMINATE ALLERGENS EFFORTLESSLY WITH OUR ADVANCED FILTRATION SYSTEM.

  • BREATHE FRESHER AIR-NEUTRALIZE ODORS AND SMOKE WITH CARBON FILTER.

  • COMPACT AND QUIET DESIGN FOR ANY SPACE; ENJOY SOOTHING AROMATHERAPY.

BUY & SAVE
$41.99 $49.99
Save 16%
LEVOIT Air Purifiers for Bedroom Home Dorm, AHAM Verified, 3-in-1 Filter Cleaner With Aroma Pad, Filters Smoke, Allergens, Pet Dander, Odor, Dust, Office, Desktop, Core Mini-P, White
3 LEVOIT Air Purifiers for Home Large Room Up to 1875 Ft² with Washable Pre-Filter, AHAM VERIFIDE, Air Quality Monitor, HEPA Sleep Mode for Allergies, Pet Hair in Bedroom, Vital 200S-P, White

LEVOIT Air Purifiers for Home Large Room Up to 1875 Ft² with Washable Pre-Filter, AHAM VERIFIDE, Air Quality Monitor, HEPA Sleep Mode for Allergies, Pet Hair in Bedroom, Vital 200S-P, White

  • TRUSTED AHAM CERTIFIED FOR OPTIMAL AIR QUALITY & SAFETY
  • POWERFUL CLEANING FOR LARGE SPACES UP TO 1875 SQ FT
  • SMART CONTROL & SCHEDULING VIA FREE VESYNC APP
BUY & SAVE
$159.90 $189.99
Save 16%
LEVOIT Air Purifiers for Home Large Room Up to 1875 Ft² with Washable Pre-Filter, AHAM VERIFIDE, Air Quality Monitor, HEPA Sleep Mode for Allergies, Pet Hair in Bedroom, Vital 200S-P, White
4 Air Purifiers for Home with H13 Quiet HEPA Filter Up to 1076 Ft² for Pet Hair, Odors, Pollen, Smoke, Compact Air Cleaner with 3 Speeds, Timer, Aroma Quiet 360°Intake Filter, White

Air Purifiers for Home with H13 Quiet HEPA Filter Up to 1076 Ft² for Pet Hair, Odors, Pollen, Smoke, Compact Air Cleaner with 3 Speeds, Timer, Aroma Quiet 360°Intake Filter, White

  • ONE-TAP OPERATION: SIMPLIFIED CONTROL FOR INSTANT, EFFORTLESS AIR CLEANING.

  • COMPACT POWER: COVERS 1,076 FT² YET FITS ANYWHERE WITH ITS SMALL SIZE.

  • 360° FILTRATION: CAPTURES 99.97% OF POLLUTANTS FOR A PURE, HEALTHY HOME.

BUY & SAVE
$26.88 $38.99
Save 31%
Air Purifiers for Home with H13 Quiet HEPA Filter Up to 1076 Ft² for Pet Hair, Odors, Pollen, Smoke, Compact Air Cleaner with 3 Speeds, Timer, Aroma Quiet 360°Intake Filter, White
5 KNKA Air Purifier for Home Bedroom Large Room Up to 3,500 Ft², HEPA Air Cleaner with Washable Pre-Filter, AHAM VERIFIDE, AQI Display, ECO Mode, Pet Mode for Pets, Allergies, Dust, Pollen, APH4000

KNKA Air Purifier for Home Bedroom Large Room Up to 3,500 Ft², HEPA Air Cleaner with Washable Pre-Filter, AHAM VERIFIDE, AQI Display, ECO Mode, Pet Mode for Pets, Allergies, Dust, Pollen, APH4000

  • AHAM CERTIFIED CADR: HIGH-EFFICIENCY AIR PURIFICATION WITH CADR VALUES OF 226/244.

  • IDEAL FOR LARGE SPACES: PURIFIES UP TO 3,500 FT² EVERY HOUR FOR MAXIMUM COVERAGE.

  • QUIET & SMART MODES: SLEEP MODE FOR NOISE AS LOW AS 22 DB; ECO MODE SAVES ENERGY.

BUY & SAVE
$142.49 $259.99
Save 45%
KNKA Air Purifier for Home Bedroom Large Room Up to 3,500 Ft², HEPA Air Cleaner with Washable Pre-Filter, AHAM VERIFIDE, AQI Display, ECO Mode, Pet Mode for Pets, Allergies, Dust, Pollen, APH4000
6 Air Purifiers for Home Large Room up to 2200sq.ft, MOOKA Air purifier for Home Pets with Washable Filter, PM 2.5 Display Air Quality Sensor Air Cleaner for Bedroom, Dorm room, Pets, Office PR1 (White)

Air Purifiers for Home Large Room up to 2200sq.ft, MOOKA Air purifier for Home Pets with Washable Filter, PM 2.5 Display Air Quality Sensor Air Cleaner for Bedroom, Dorm room, Pets, Office PR1 (White)

  • POWERFUL MULTI-STAGE FILTRATION FOR CLEAN AIR EVERYWHERE.

  • PET MODE QUICKLY ELIMINATES HAIR AND ODORS WITH EASE.

  • REAL-TIME AIR QUALITY DISPLAY FOR INFORMED COMFORT.

BUY & SAVE
$79.99 $104.99
Save 24%
Air Purifiers for Home Large Room up to 2200sq.ft, MOOKA Air purifier for Home Pets with Washable Filter, PM 2.5 Display Air Quality Sensor Air Cleaner for Bedroom, Dorm room, Pets, Office PR1 (White)
7 PuroAir 240 HEPA Air Purifier for Home Large Rooms - Covers Up To 1,000 Sq Ft - Filters Up To 99.9% of Pollutants, Smoke, Pollen, Dust - Quiet HEPA Air Filter - Air Purifiers for Bedroom

PuroAir 240 HEPA Air Purifier for Home Large Rooms - Covers Up To 1,000 Sq Ft - Filters Up To 99.9% of Pollutants, Smoke, Pollen, Dust - Quiet HEPA Air Filter - Air Purifiers for Bedroom

  • BREATHE EASY: CLEANS 1,000 SQ FT IN JUST ONE HOUR-FAST RESULTS!
  • ADVANCED 3-LAYER FILTER CAPTURES 99.9% OF ALLERGENS AND POLLUTANTS.
  • QUIET 24/7 OPERATION WITH SMART SENSOR FOR EFFORTLESS AIR QUALITY.
BUY & SAVE
$159.00 $199.00
Save 20%
PuroAir 240 HEPA Air Purifier for Home Large Rooms - Covers Up To 1,000 Sq Ft - Filters Up To 99.9% of Pollutants, Smoke, Pollen, Dust - Quiet HEPA Air Filter - Air Purifiers for Bedroom
8 GermGuardian HEPA Air Purifier for Home, Large Rooms - 743 Sq. Ft. with HEPA Air Filter, UV-C Light & Odor Reduction, AC4825E, 22" Tower, Gray

GermGuardian HEPA Air Purifier for Home, Large Rooms - 743 Sq. Ft. with HEPA Air Filter, UV-C Light & Odor Reduction, AC4825E, 22" Tower, Gray

  • 99.97% ALLERGEN REMOVAL: CAPTURES SMOKE, DUST, AND POLLEN FOR CLEANER AIR.

  • ZERO OZONE SAFETY: INDEPENDENTLY VERIFIED FOR SAFE, FRESH AIR DELIVERY.

  • FAST WHOLE ROOM COVERAGE: CLEANS UP TO 743 SQ. FT. IN JUST AN HOUR!

BUY & SAVE
$83.98 $99.99
Save 16%
GermGuardian HEPA Air Purifier for Home, Large Rooms - 743 Sq. Ft. with HEPA Air Filter, UV-C Light & Odor Reduction, AC4825E, 22" Tower, Gray
9 Air Purifiers for Office with H13 Quiet HEPA Filter Up to 1076 Ft² for Pet Family, Pollen, Smoke, Compact Air Cleaner with 3 Speeds, Timer, Aroma Quiet, 360°Intake, for Home Bedroom, Black

Air Purifiers for Office with H13 Quiet HEPA Filter Up to 1076 Ft² for Pet Family, Pollen, Smoke, Compact Air Cleaner with 3 Speeds, Timer, Aroma Quiet, 360°Intake, for Home Bedroom, Black

  • ONE-TAP OPERATION: SIMPLIFIED CONTROLS FOR QUICK, EFFORTLESS USE.
  • COMPACT POWER: CLEANS 1,076 FT² IN MINUTES, FITS ANYWHERE EASILY.
  • QUIET COMFORT: ENJOY SERENE AIR PURIFICATION WITH ESSENTIAL OILS.
BUY & SAVE
$26.88 $38.99
Save 31%
Air Purifiers for Office with H13 Quiet HEPA Filter Up to 1076 Ft² for Pet Family, Pollen, Smoke, Compact Air Cleaner with 3 Speeds, Timer, Aroma Quiet, 360°Intake, for Home Bedroom, Black
+
ONE MORE?

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.

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.