How Long Does It Take For An Air Purifier To Clean A Room?

How long to Clean a Room?

Twenty minutes to two hours...However....

It depends on the size of the room, the circulation rate in that room, and many other factors. However, it usually takes about 15 to 20 minutes for an air purifier to clean a space with no immediate dander or debris."

Many people often ask "How long does it take for an air purifier to clean a space?" - with varying answers from 10-20 minutes. In reality, it's difficult to say how long an air purifier takes to clean a space because there are so many factors which determine this. However, here is some background information you might find helpful when answering this question...

There are also links provided in the article which will refer you back to other sources providing further insight.

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Is it OK to leave air purifier on all night?

Yes, it is OK to leave your air purifier on all night. The air purifier will continue to work through the entire night and for a couple hours in the morning until you turn it off. If you wish, you can simply turn on your air purifier at night so that your room is clean and fresh when you wake up.

Some people like to use an air purifier overnight because they suffer from allergies or asthma, and find that they sleep better with clean, fresh air flowing through their bedroom.

Where should I place my air purifier?

It is better if it is not on the floor, placing it near to a window or door is a good place for it. If your air purifier is placed in the middle of the room it can take a long time to clean your room, so place it at least two or three feet away from the floor. If you place it in the middle of your room, or somewhere where particles can fall directly from the ceiling or walls, it will clean the room faster.

Does an air purifier work on cleaning other places besides my home or office?

Air purifiers are designed to remove harmful airborne contaminants and dander from your home and office. However, they can be used to clean many other places as well. Because air purifiers use filters, they are also effective against pollen and allergens.

For this reason, many people with allergies use an air purifier during allergy season or while traveling because it helps prevent allergies from occurring due to allergens in the atmosphere.

Do air purifiers use a lot of electricity?

No, air purifiers do not draw large amounts of electricity. In fact, most have built-in power controls that allow you to select the amount of power you want to use. The two main factors in determining how much electricity an air purifier will use are the size of it (somewhat related to the cost of electricity), and its setting.

If you choose a more powerful setting, more energy will be used. It is a good idea to check your electrical bills every now and then after using your air purifier for months or years.

Do air purifiers make noise?

Yes, probably. The amount of noise that an air purifier makes will depend on its size, and the speed at which it's operating. Some air purifiers are designed to have a low noise level, while others produce a high level of sound.

There are Air Purifiers that are very quiet.

Are air purifiers environmentally friendly?

Air purifiers are environmentally friendly because they help prevent the spread of airborne particles which can lead to health problems for many people who breathe the air around them. Most air purifiers work by using filters which can be easily cleaned and reused for years.

In addition to this, some models use rechargeable batteries instead of disposable batteries. There are also models which can be used with rechargeable batteries as well as non-rechargeable ones.

Can you run an air purifier with the windows open?

Yes, you can run an air purifier with the windows open. It is suggested that you keep the air purifier at a lower level of intensity in this instance because the air purifier has to compete with outside air for being inside the room. You do not want your room to get an unbalanced amount of outside and inside air.

How big is an air purifier?

Air purifiers come in all shapes and sizes. They range from large units that are designed to rid entire rooms of particles, pollen or smoke odors to small desktop units which remove only a small amount of particles from the air. The size that you need will depend on how much area you need cleaned at one time, and the extent of the particles or pollutants that need cleaning.

Can an air purifier clean more than one room?

It is recommended that each room has its own air purifier because different rooms will have different problems with particles or dirt. There are models which can clean multiple rooms but it depends on the model.

Should I leave my air purifier on when I'm not home?

Yes, it is OK to leave your air purifier on when you're not home as long as you are using it to maintain clean air in your home. Many people use their air purifiers in this way. Modeling is done on several of the Air Purifiers with results showing that they do clean the air and remove particles from the air at 55 cubic feet per minute, at a very low setting.

When using one of these models, we suggest you set it to a medium or low setting so that it will continue cleaning while you are not home.


Air purifiers are a popular home and office appliance that help remove particles from the air. These include smoke, dander, dust, and other allergens. Air purifiers can improve indoor air quality and provide an overall cleaner environment to live in. By removing particles from the air, they also reduce the number of airborne infections such as colds and flu.

Hopefully, this buyer's guide has helped you get the answers to all your questions about air purifiers. If not, please leave your comments and questions below and we will be happy to help with any additional information that you may need in choosing the best air purifier for your home or office.

  • 【Small & High Efficiency Air Purifiers for Bedroom】: Air Purifier; Light (3.2lb), small(6.3*6.3*9.3 in) but mighty with large purification area covered(up to 160sq.ft). Perfect for quickly cleaning a wide range (bedroom, dorm room, office desk ) of contaminants including dust, pet dander, cooking and smoke odors in a certain space. It also the best choice for puppy mothers pet air purifier
  • 【Quiet Operation & 3 Fan Speed】: Will not affect your mood; HEPA Air purifier runs at 23dB low noise level on Low Speed, for your undisturbed sleep or reading; three different fan speeds can be selected according to the actual air quality and space
  • 【Air purifier with fragrance sponge and night light function】: add a few drops of essential oil (not included) to the sponge under the air outlet of the purifier, the aroma will diffuse with the air movement; the air purifiers for home have a blue night light Function, long press the switch to turn on or off
  • 【Multiple Filtration System】: HEPA Air Purifiers for home with UV Light & 4 in 1 Nano-Silver Coating Filter clears out of 0.3-micron airborne contaminants, True HEPA Filter reduces and & absorbs smoke & odors via the nano-silver coating and carbon layer, the UV light and the blue net keep the air clean around you. (replacement air filter available to purchase – search "TOPPIN Air Purifier Filter")
  • 【Notes】: 1.Our brand is being upgraded, the product brand may be one of TOPPIN or HYGGIE. Both brands belong to TOPPIN Genuine products, please rest assured to purchase 2. The adapter is stored in the middle of the filter element inside the air purifier; 3. Please remove plastic packaging of new filter before running the air purifier; 4. The UV lamps are invisible to the naked eye since direct exposure to eyes may cause injury and do not look directly at a UV lamp source, even briefly.
  • 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 1095 ft² of purification area. Every aspect of Core 300 is designated for a better purification effect.Humidity: < 85% RH. Standby Power: < 0.8W. Operating Conditions Temperature: 14°–104°F / -10°–40°C..Power Supply : AC 120V, 60Hz
  • HIGH PERFORMANCE: Enjoy fresh air in 12 minutes with the Core 300 / Core300-P Air Purifier. Featuring VortexAir Technology, 360° air intake, and CADR of 141 CFM / 240 m³/h (Clean Air Delivery Rate), can purify air of a 1,095 ft² space once in one hour. The higher the CADR of an air purifier, the larger its purification area
  • FIND RELIEF: Ease sneezing, congestion, and other allergy symptoms caused by airborne contaminants. the efficient filter of the 3-in-1 filter removes dust, pollen,  and any airborne particles with a size of 0.3 microns (µm)
  • OFFICIAL LEVOIT FILTERS: Search for B07RSZSYNC to find Levoit's replacement filter for Core 300 / Core 300-P. Levoit filters provide the best fit and filtration, while off-brand filters are unreliable and may damage the air purifier
  • MULTIPLE FILTER CHOICES: Choose from a variety of replacement filters to best meet your needs. The Toxin Absorber Filter specializes in smog, toxins, and VOCs. The Smoke Remover filter specializes in wildfire, smoke and etc. And the Pet Allergy Filter helps to capture pet dander and absorb unpleasant odors
  • 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, ensuring it won't get in the way of a good night's rest
  • SLEEK DESIGN: The Core 300 / Core300-P practically serves your home while blending in with your decor. Its award-winning design (Red Dot, 2020) and modern white finish help your air purifier fit anywhere in your home/bedroom/room
  • UNDISTURBED OPERATION: The display light can be turned off to enjoy a perfect night of sleep without the effect of light. A timer for 2/4/6/8 hours and filter lifetime indicator for your convenience
  • FULL CERTIFIED FOR SAFER: Energy Star Verified, Complies with California air resources board (CARB) for indoor cleaning devices. Also FCC certified, ETL listed
  • PURE PERFECTION: #1 Rated room air purifier for multiple chemical sensitivity (MCS) & tobacco smoke. The GC MultiGas by IQAir is a large room air purifier with the chemical removal power of over 100 gas masks. Each system uses our exclusive HyperHEPA air filter, activated carbon, gas cartridges, and post-filter sleeves to remove 99% of all contaminants.
  • PROVEN MEDICAL-GRADE FILTRATION: This floor-standing, room air purifier pulls odors, gases, pollution, mold, pollen, dust, formaldehyde, tobacco smoke, smells, allergens, pet dander, asthma triggers, and even ultra-fine biocontaminants from the air. Perfect for spaces up to 1125 sq ft.
  • SIZE MATTERS: Our exclusive HyperHEPA filters remove particles up to 100x smaller than traditional room air filtration systems, down to .003 microns! Particles smaller than traditional air filtration’s abilities account for 90% of all airborne particles. That’s why we’re the only room air purifier system to remove 99% of contaminants from your air.
  • BREATHE EASY: This HyperHEPA air purifier covers large rooms while taking up little floor space. It's perfect for bedrooms, offices, bathrooms, garages and more. Get the best from your room air purfier with IQAir.
  • YOUR AIR, SMARTER: IQAir exists to create safe living and working environments with innovative room air purifiers, home air purifiers, business air purifiers, and personal air purifiers that give you the cleanest air possible. Experience filtration done better. These orders will require a signature upon delivery. EPA Est. No.: 97566-CHE-1; CARB EO No.: G-10-059. THIS ITEM SHIPS IN TWO (2) BOXES. One box for the air purifier, one box for the air filters.
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Nick Le Page

 An air purifier is a device designed to remove dust, pollen, smoke, soot, mold spores, smog, and other airborne pollutants from the air.

If you want to keep your home clean and free of contaminants—and save money on heating and air conditioning bills—quality air purifiers are a powerful first step.

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