A 400 sq ft room is a fairly small space, so an air purifier that is designed for a smaller area would be the best option. The Honeywell HPA-100 is a great choice for a small room, as it is designed specifically for spaces up to 100 sq ft. It has a filter that captures 99.97% of particles as small as 0.3 microns, and it also comes with a five-year warranty.
A Shortlist Of The Best Air Purifier For 400 Sq Ft
If you don’t have enough time, check out this shortlist of the best air purifier for 400 sq ft and choose the one you like the most.
10 Best Air Purifier For 400 Sq Ft People Love In 2022: In Depth Features
- Coway Airmega 400 room air purifier is designed to accommodate large room sizes up to 1,560 square feet and cleans the air at least two times per hour when used as recommended.
- Coway Airmega Max2 filter—combined activated carbon and True HEPA filter—captures and reduces up to 99.97% of 0.3 micron particles in the air, including pollen, pollutants and other allergens. It also reduces volatile organic compounds by more than 99% and reduces fumes such as NH3 and CH3CHO. Includes washable and permanent pre-filter to catch larger dust particles.
- Coway Airmega’s pollution sensor communicates indoor air quality testing in real-time. The brightly colored LED ring lets you know how clean or dirty your indoor air is, every minute of the day.
- Coway Airmega has five fan modes: Smart, Sleep, Low, Medium and High. Noise level is nearly silent at lower speeds. Max noise at highest setting is 43.2 dB.
- Power source type: Corded Electric
- All-in-one: The replacement filter is a combination unit that contains the mesh pre-filter, H13 Hepa filter, and activated charcoal all in one
- Easy to Clean: For best results, remove the filter once a month and clean with a soft brush or gently vacuum; Do Not Get Filter Wet
- Easy to Change: Turn off and unplug the unit; Turn the purifier upside down on a soft, non-scratch surface; Turn filter counter-clockwise to remove; Remove packaging from replacement filter and insert into base of purifier; Turn filter clockwise to close; Turn unit upright, plug in and turn it on; Press and hold the 'Reset Filters' indicator button until the light turns off
- Replacement: For Silveronyx 3-Speed Portable Air Purifier Filter
- Silveronyx Air Purifier Filter Replacement - 3 Speed Portable with Strap - HEPA home onyx purifiers silver speed true 400 sq ft
- Unique Design & Energy Efficiency: The HEPA air purifier fits easily into any house decor with the sleek and modern design; passed the Energy Star test, enjoys 24H cleaner air but only consumes 24 watts of power even at the highest speed
- Efficient Purification & Wide Coverage: Equipped with H13 True HEPA Filter and powerful filter system, with a CADR of 180 m³/h and 360° air intake, helps to capture the smallest airborne pollutants in rooms up to approximately 800 sq ft; perfect for living rooms, bedrooms, kitchens, offices; lightweight and easy to move from room to room
- 3-Stage Filtration: Features a 3-stage filtration system to reduce the common dust and pollutants; the pre-filter against the larger airborne particles, the H13 true HEPA captures 99.97% of particles as small as 0.03 microns; the activated carbon filter reduces smoke and household odors, effectively improving the family's breathing
- Easy to Use & Multifunction Settings: Adjust 3 fan speeds at low, medium and high via one-touch button; quietly purify your space at 32db in sleep mode; features a filter change indicator for your convenience; uses the child lock function to avoid error operation, and the 7 optional nightlight colors help to create a wonderful atmosphere
- Safety and Warranty: This large room air purifier has been tested and proven by full certification, CARB-certified, FCC-certified, and ETL-compliant; search for "B09Q34SG4V" to purchase the genuine replacement filter, supported by our 1-year warranty, feel free to contact us if you have any questions, we will provide you with a satisfactory solution
- Pure Air Purifier for Pets - Oransi OV200 real HEPA air purifier is ideal for pet hair to keep large rooms, offices, living areas, and small basements with fresh clean air. Coverage up to 400 square feet with 3 air changes per hour. Four hundred square feet is about the size of a standard two-car garage or a 20 feet wide by 20 feet deep room.
- Real HEPA Filters and Carbon - OV200 comes with 3 stages of air filtration. A combination pre-filter and real HEPA filter and an activated carbon filter to help with light odors. Optimized to remove airborne dust, pollen, pet dander, mold, and other solid airborne particles. Lightweight, portable, easy to move, making it the best air purifier for home.
- Quiet Large Air Purifier - Each of 3 different fan speeds never rise above a 54 dB noise level, making this a silent addition to your household.
- Easy to Use Display - The electronic control on this plug in air purifier is simple to use, has a child-lock, and also displays an indoor air quality monitor; comes with remote control.
- Certified Ozone Safe - This purifier is certified by the State of California Air Resources board to make sure anyone sensitive to low levels of ozone isn't negatively effected. Includes 1 Filter. Removes 99%+ of airborne allergies & particulates. Operates at 120V/60 (North America).
- ADVANCED HIGH-EFFICIENCY FILTER: Captures over 99% of airborne particles 0.3 microns.
- CAPTURES ALLERGENS: Filters pollen, dust, pet dander, smoke and helps reduce odors.
- IDEAL FOR BEDROOMS & MORE: Have confidence you’re breathing cleaner air in bedrooms, family rooms, playrooms, or any other rooms up to 400 square feet needing cleaner air.
- POWERFUL & QUIET FAN: Features 360-degree airflow that quietly pulls in polluted air from multiple directions and disperses cleaner air throughout the room.
- BUILT-IN AIR QUALITY MONITOR: Easy to read air quality monitor continuously measures pollutant levels. The LED screen on the monitor changes colors based on your current air quality, and easy to see from across the room. (Blue = Good air quality, Green = Moderate air quality, Yellow: Bad air quality and Red: Very bad air quality).
- SMART AUTO MODE: Automatically adjusts between 18 fan speeds based on the air quality level detected in the room, optimizing delivery of cleaner, healthier indoor air.
- INDEPENDENTLY TESTED: Certified by the Association of Home Appliance Manufactures (AHAM) for Clean Air Delivery Rates (CADR): Tobacco Smoke: 267, Dust: 278, Pollen 329. CADR indicates the volume of filtered air that an air purifier delivers. AHAM recommends the average CADR rating be at least two-thirds the area of your room.
- ENERGY STAR CERTIFIED: 40% more energy-efficient than non-certified standard models.
- PORTABLE: Includes caster wheels that allow you to easily relocate the air purifier to a different living space in your home.
- MAXIMUM COVERAGE: Cleans up to 1,600 sq ft in one hr, 840 sq ft in 30 min, 430 sq ft in 15 min. [*Based on average CADR for pollen, smoke, and dust when operating at fan setting 3. Assumes closed room with 8 ft ceiling.] Perfect for large rooms.
- HEPA H13 FILTRATION: Trusted to remove 99.9% of harmful particles including allergens, odors, VOCs, smoke, pollen, pet dander, dust, smog, contaminants, and more down to 0.1 microns in size. Captures finer particles than HEPA H11 (0.3 microns).
- ULTRA QUIET: Choose from 3 fan speeds, with the lowest setting operating virtually silent. Runs at 110 Volts at a min noise level of 46dB and max of 66dB. For the most discreet operation, enable sleep mode to completely dim the unit's panel lights.
- EASY TO USE FEATURES: Includes a sleek touch screen operation panel with 0-8 hour timer, fan speed, sleep mode, filter replacement indicator, and child lock, great for both kids and pets.
- QUALITY TESTED & BACKED: CARB, ETL, and Energy Star certified. Backed by a USA registered Lifetime Warranty when genuine Medify replacement filters are used. The replacement filter (B07LGDYV3C) lasts 3,000 hours or about 6 months.
- White color
- TP02 MODEL
- OZONE FREE: Use your purifier with peace of mind. This Levoit air purifier is 100% ozone free and does not use UV-C light or anion purification methods that can cause harm to the user
- PROFESSIONAL AIR CARE: The H13 True HEPA Filter works alongside the Pre-Filter and Activated Carbon Filter to target dust, pollen, pet dander, VOC's, tobacco smoke, household odors from pets, cooking, and other allergies. Better than H11 HEPA, H13 HEPA filters 99.97% of airborne particles 0.3 microns in size
- EXTRA-LARGE CLEANING AREA: The LV-H134 purifies air in 2340 ft² rooms in one hour, and 1170 ft² rooms in 30 minutes (CADR 530), making it perfect for living rooms, bedrooms, apartments, offices, kitchens, basements and playrooms. The wheeled design helps to bring fresh air to every room of your home
- POWERFUL DESIGN: Enjoy the fresh air on all sides with help from the air purifier's tower structure and 360° air circulation for quick, efficient filtration
- UNDISTURBED REST: Sleep soundly by turning off the display light, setting a timer for up to 12 hours, and selecting Sleep Mode for noise levels as low as 23dB
- CLARITY AND CONFIDENCE: The Auto Mode uses a Laser Dust Sensor to measure the surrounding air and automatically adjust the fan speed in real-time. You can easily view the PM2.5 value on the display, which shows the amount of detected particles within 1 cubic meter
- SLEEK AND STYLSIH: The minimalist tower design and streamlined, intuitive controls make the air purifier a seamless, elegant addition to any space
- NOTE: Genuine Levoit replacement filter for LV-H134 is back in stock. Please search for B07DVYFBNY for purchase
- LARGE COVERAGE: The top-performing Levoit Core 400S Smart True HEPA Air Purifier can purify large rooms, such as bedrooms, living rooms, kitchens, and basements. Purify a 403 ft² room 5x per hour and a 990 ft² room 2x per hour
- 3-STAGE FILTRATION: Filtration includes a Pre-Filter, H13 True HEPA Filter, which traps viruses, bacteria, pollen,dust, and pet dander, and a Custom High-Efficiency Activated Carbon Filter that helps neutralize odors, cooking and wildfire smoke, and VOCs
- WHISPER-LEVEL QUIET: Keep the Core 400S running throughout the night, as Sleep Mode uses the lowest fan speed (24dB) to create a sleep-friendly space that’s as quiet as falling leave
- COMBAT ALLERGIES AND ASTHMA: Powerful air purification during allergy and wildfire seasons helps capture allergens that cause sneezing, congestion, breathing difficulties, and other symptoms
- VIEW AIR QUALITY: The laser dust sensor scans the surrounding air for airborne particles, continuously updating the PM2.5 display and creating graphs in the VeSync app so you can see how your air quality has improved
- HANDS-FREE VOICE COMMAND: Hands-free control with Amazon Alexa and Google Assistant allows you to control settings when your hands are full with cooking, caring for babies and children, or playing with pets
- SCHEDULE SETTINGS TO MATCH YOUR ROUTINE: Program the air purifier to use different modes and fan speeds at certain times, so you can have your week planned in advance. With scheduling, you never have to worry about forgetting to change your settings
- TRUSTWORTHY AND SAFE: The Core 400S is Energy Star and FCC certified, ETL listed, and a recipient of the German Design Award (2021) and iF Design Award (2021). Only use Levoit replacement filters (search B08SQQK6K7) for best results and product performance
How To Choose The Best Air Purifier For 400 Sq Ft
Before choosing a air purifier for 400 sq ft, you should take the following considerations into account.
When purchasing an air purifier for 400 sq ft, it is important to choose one that fits the specific needs of the residence. Some important factors to consider include: room size, noise level, and budget. Additionally, it is important to be sure that the air purifier has been tested and is approved by the government.
Related Frequently Asked Questions
How Much Square Footage Does An Air Purifier Cover?
An air purifier will typically cover anywhere from 3,500 to 7,500 sq ft.
What Air Purifier Covers The Most Square Footage?
A large air purifier such as the Honeywell 7500 has a max. size of 6,000 sq ft.
Does Room Size Matter For Air Purifier?
There is no definitive answer to this question as the size of the room in which an air purifier resides will have a significant impact on its performance. However, it is generally recommended that the room size be fifteen to thirty-six square feet in order to provide enough space for the air purifier to function efficiently.
How Do I Calculate Air Purifier Capacity?
There is no one answer to this question as it depends on a variety of factors including the size and shape of the room, the type of air purifier being used, and the type of filter. However, some tips on how to calculate air purifier capacity can include using room size and equipment limitations as well as occupancy tracking to determine how often each person or pet is using the room.
The best air purifier for 400 sq ft is a HVAC system that uses activated carbon filters to remove allergens and other toxins from the air.