How long does it take for an air purifier to remove mold?

Author: Miss Nona Kemmer Jr.  |  Last update: Sunday, November 2, 2025

Mold Particles In a standard-sized room, a powerful air purifier can significantly reduce mold levels within 24 to 48 hours. This time frame depends on the air purifier's clean air delivery rate (CADR), the airflow rate, the size of the room, and the air purifier.

How effective are air purifiers for mold?

HEPA purifiers are remarkably adept at catching mold spores. A 2009 study found that HEPA purification significantly reduced mold counts and improved symptoms in children with mold allergies. However, if your home already has a mold problem, a HEPA purifier won't remove the growth that's already taken hold.

How long does it take to notice a difference with an air purifier?

The most commonly asked question is how long does it take for an air purifier to work? Generally, an air purifier takes about 30 minutes to two hours to purify a room. But there are aspects including the size of the room, filter, speed of purification, and more that must be factored in.

How long does it take for mold to get out of the air?

Mold spores stay airborne indefinitely. While in the air, they remain in a dormant state until they come into contact with wet or moist surfaces, at which point they may start growing into visible mold.

Should an air purifier be on the floor?

For this reason, the equipment can stand in the living room during the day, while in the bedroom at night. Do not forget about the height of the position of the purifier. Specialists recommend placing the device on the floor, because it is near the ground that there is a higher concentration of pollutants.

Will an Air Purifier Help with Mold? (Can it Remove Mold Spores?)

Should an air purifier run all day?

Many people think that switching it off during the night or when they're not present is a logical energy-saving measure, but it is recommended to keep it running constantly. Once you turn off your air purifier, the air quickly becomes contaminated again with mold, dust, dander, and other pollutants present in the air.

Where is the most effective place to put an air purifier?

Choose a Central Location

Place your air purifier in a central area of the room to allow for efficient airflow and circulation. This means you should keep your device away from walls, corners, and other obstructions (more on why in a second).

What pulls mold out of the air?

An air purifier with a HEPA filter is the traditional option for filtering particles from the air and can remove some mold spores. The HEPA standard is based on the ability to remove 99.97 percent of particles that are 0.3 microns in size or greater.

What are signs of mold sickness?

Although symptoms can vary, the most common symptoms seen in people exposed to mold indoors include:
  • Nasal and sinus congestion.
  • Eye irritation, such as itchy, red, watery eyes.
  • Wheezing and difficulty breathing.
  • Cough.
  • Throat irritation.
  • Skin irritation, such as a rash.
  • Headache.

How long does it take to detox mold?

Recovery from long-term mold exposure varies based on individual health and the severity of exposure. Some may see improvement within a few days of removing the mold source, while others may take weeks or months. In severe cases, professional medical intervention may be required.

How can I tell if my air purifier is working?

First, check the system's airflow. A working air purifier features clear, consistent airflow. If the purifier is not blowing out air (easily determined by placing your hand in front of the system), there's likely a problem. If you are unable to hear anything, that's also a sign the purifier isn't working.

How long does an air purifier take to clear a room?

For instance, an air purifier with a high CADR in a small room can rapidly reduce pollutants within 15 to 30 minutes. Conversely, in larger spaces, it may take a few hours to achieve the same level of cleanliness.

Is it better to run a air purifier at day or at night?

This is why most manufacturers will recommend you to leave your air purifier running all day, especially if it comes equipped with an automatic setting. This setting allows your device to monitor the quality of your air in your home for you and to adjust its speed depending on the levels of pollutants that it detects.

How do you disinfect air from mold?

Install an Air Purifier: Using an air purifier to remove mold spores in the air is one of the best ways to initially get the problem under control because they work by capturing and removing harmful pollutants in your home.

What's better for mold, air purifier or dehumidifier?

If you're dealing with mold, mildew, or dust mite issues, a dehumidifier might be the better choice. However, if you're concerned about airborne particles such as pollen, pet dander, or smoke, an air purifier might be more appropriate.

Can mold behind walls make you sick?

It irritates the nose and throat, which can lead to both sneezing and coughing as your body tries to get rid of the irritant. Inhaling mold spores can also trigger coughing in people with allergies or an asthma attack, for those with asthma.

How long does it take to get sick from mold exposure?

According to the CDC, people usually experience their first symptoms within 2 to 9 hours of their first exposure. On the other hand, some people could go for weeks or months before feeling sick if their exposure is limited enough. This is why it is also important to check damp, dark areas of your home for mold.

Can you clean up mold yourself?

Scrub mold off hard surfaces with detergent and water, and dry completely. Fix plumbing leaks and other water problems as soon as possible. Dry all items completely. Absorbent or porous materials, such as ceiling tiles and carpet, may have to be thrown away if they become moldy.

What plant removes 78% of airborne mold?

English Ivy is exceptional at purifying air, removing 78% of airborne mold in 12 hours. Its dense foliage traps moisture and absorbs mold spores and other airborne toxins, making it an ideal choice for improving indoor air quality and alleviating allergy symptoms.

What kills mold spores in your lungs?

Treatment typically involves a person taking an antifungal medication, such as voriconazole. However, the type of medication a doctor prescribes may depend on the type of Aspergillus mold causing the condition because some species are resistant to certain antifungal medications.

What eats away at mold?

Vinegar is natural and safe mild acid that can kill 82% of mold species. Plus it doesn't give off dangerous fumes like bleach. If you want to use vinegar to prevent mold growth on surfaces, spray vinegar on the surface and leave it. Repeat every few days to keep the surface mold-free.

Should air purifier go on floor or table?

Placing your air purifier on the floor can be highly effective for capturing allergens. Dust mites, pet dander, and other pollutants often settle down low. Floor placement makes your air purifier easy to access for regular maintenance, like changing filters. No reaching up high or moving furniture around.

Is it better to have two small air purifiers or one big one?

Air circulation: If your room has poor air circulation, or is a complex shape (such as an L shape or a long thin shape) then you may benefit from multiple smaller air purifiers to improve ventilation. Two air purifiers placed at different locations in your room may help improve air circulation.

How long does it take for an air purifier to work?

Under optimal conditions, most air purifiers begin showing results within 30 minutes to 2 hours.

Previous article
How long does it take to replace a 40-gallon water heater?
Next article
Is it OK to use Windex on screens?