Do I Need an Air Purifier for Asthma? Written by: Shea Sundali Updated: 2026-01-29 Read time: 12 minutes Follow Us: Asthma is a chronic respiratory condition that affects the lungs and can be triggered by exposure to various pollutants. Air purifiers with HEPA filters are designed to remove harmful particles and pollutants from the air, which can reduce asthma triggers. Table of Contents While research shows that air purifiers can be effective in reducing indoor pollutants that trigger asthma, they are not a cure for these conditions. They should be used as part of an overall management plan that includes medication prescribed by a healthcare provider. When searching for an air purifier suitable for asthma and COPD, there are a few things you should consider. First, look for a model with a HEPA filter. HEPA filters are designed to capture 99.97% of airborne particles as small as 0.3 microns in size, making them ideal for removing environmental triggers from the air. This can be an important part of your treatment plan if you are living in the US. Secondly, consider the size of the room where you will use the air purifier. Make sure you choose a hepa purifier model with cfm filter technology that is powerful enough to clean the entire space effectively and capture small particles, especially if you or someone in your household has COPD. Lastly, consider any additional features that may be helpful for managing your asthma and COPD symptoms. For example, some models have built-in HEPA purifiers and sensors that monitor indoor air quality and adjust their settings accordingly. How Air Purifiers Can Help with Asthma The respiratory system of asthmatics is particularly sensitive to airborne irritants and allergens. Fortunately, air purifiers can help reduce these symptoms by filtering out pollutants from the air. Air purifiers work by drawing in air through a filter or series of filters that trap particles such as dust, pet dander, pollen, mold spores, and other harmful substances. Once filtered, clean air is released back into the room. Asthma Symptoms The most common symptom of asthma is wheezing, which is a high-pitched whistling sound when breathing. Other symptoms may include coughing, chest tightness or pain, shortness of breath, and rapid breathing. An asthma attack occurs when the airways become inflamed and constricted due to various triggers. During an attack, the muscles around the airways tighten up, making it even harder to breathe. Common Asthma Triggers Many asthma attacks are triggered by airborne pollutants and allergens, both indoors and outdoors. Some of the most common triggers include: Dust mites, pet dander, and pollen: Microscopic allergens that can accumulate in indoor air. Mold spores: Common in damp environments and can worsen respiratory symptoms. Smoke and pollutants: Includes cigarette smoke, wood-burning stoves, and vehicle exhaust. Volatile Organic Compounds (VOCs): Found in cleaning products, paints, and building materials, VOCs can irritate the airways. Exercise is another common trigger for people with asthma. Exercise-induced asthma occurs during physical activity when breathing becomes faster than usual resulting in dry mouth or throat irritation, which leads to coughing fits followed by wheezing. Stress can also trigger an asthmatic episode because it leads to hyperventilation which causes the airways to constrict. In some cases, strong emotions like laughing or crying can also trigger an asthma attack. Factors to Consider When Choosing an Air Purifier for Asthma HEPA Filter: The Key to Effective Asthma Relief Air purifiers are an excellent investment for those suffering from asthma, as they can help alleviate symptoms by removing harmful pollutants and allergens from the air. When choosing an air purifier for asthma relief, it’s important to look for one with a HEPA filter. HEPA stands for High-Efficiency Particulate Air, and these filters are designed to capture 99.97% of particles that are 0.3 microns or larger in size – including common asthma triggers such as pollen, dust mites, and pet dander. Room Size Matters: Understanding CADR Another important factor to consider when choosing an air purifier for asthma relief is the size of the room where it will be used. This will determine the appropriate CADR (clean air delivery rate) needed to effectively clean the air in that space. CADR is a rating system that measures how much clean air an air purifier can deliver per minute, based on its fan speed and filter efficiency. As a general rule of thumb, you’ll want an air purifier with a CADR rating that’s at least two-thirds the size of your room. ACH Rate: How Often is the Air Being Filtered? In addition to CADR, you’ll also want to consider the ACH (air changes per hour) rate of your chosen air purifier. This refers to how often all of the air in a room is being filtered through the unit each hour. For those with asthma, it’s recommended to choose an air purifier with an ACH rate of at least four – meaning that all of the air in the room is being filtered every 15 minutes. Additional Features: Activated Carbon Filters & UV-C Lights While HEPA filters are essential for capturing airborne allergens and pollutants, some models may offer additional features that can further reduce asthma triggers in your home. Activated carbon filters, for example, are designed to absorb odors and chemicals from the air – making them a great choice for those with chemical sensitivities or allergies. UV-C lights, on the other hand, can help kill bacteria and viruses in the air. Avoid Ionizers and Ozone Generators While some types of air purifiers may claim to be effective in removing allergens and pollutants from indoor air quality, they may actually release harmful byproducts into the air that can worsen asthma symptoms. This includes ionizers and ozone generators. Ionizers work by releasing negatively charged ions into the air which attach themselves to positively charged particles such as dust or pollen causing them to fall out of the air onto surfaces below. However, ionizers can also produce ozone which is a lung irritant and can worsen asthma symptoms. Ozone generators work by producing ozone which reacts with pollutants in the air to form other substances. However, these byproducts can also be harmful to your health and should be avoided. Noise Level: Consider Your Environment When choosing an air purifier for asthma relief, it’s important to consider the noise level of the unit as well. If you plan to use your air purifier in a bedroom or other quiet space, you’ll want to choose one that operates quietly – ideally below 60 decibels. Some models may offer “whisper-quiet” modes that reduce noise levels even further. Certifications: Trustworthy Standards Finally, it’s important to look for certifications such as Energy Star or AHAM (Association of Home Appliance Manufacturers) when choosing an air purifier for asthma relief. These certifications ensure that the unit meets industry standards for efficiency and performance – giving you peace of mind knowing that your investment is backed by trustworthy testing and research. Best Air Filters for Asthma Relief HEPA Filters High-efficiency particulate air (HEPA) filters are considered the most effective for asthma relief. They work by capturing small particles in the air, such as pet dander, pollen, and dust mites. HEPA filters can capture up to 99.97% of particles as small as .3 microns in size. True HEPA filters are even more efficient than regular HEPA filters. They can capture smaller particles that regular HEPA filters cannot, such as viruses and bacteria. True HEPA filters have been shown to improve indoor air quality significantly and reduce asthma symptoms. Carbon Filters Carbon filters can also remove odors and chemicals from the air that can trigger asthma symptoms. Carbon filters work by absorbing chemicals through a process called adsorption, which involves trapping pollutants on the surface of activated carbon. When used in conjunction with a HEPA filter, carbon filters can provide additional protection against airborne irritants that may cause or worsen asthma symptoms. However, they do not capture particulate matter like HEPA filters do. AirPurifier.com’s Top Recommendations for Asthma Alen BreatheSmart 75i Buy Now AllerAir AirMedic Pro 5 HD Buy Now Austin Air HealthMate (HM400) Buy Now Honeywell Allergen Plus HPA200 Buy Now RabbitAir MinusA2 (SPA-780A) Buy Now Learn more about our top recommendations for air purifiers for asthma Tips for Using an Air Purifier to Manage Asthma To get the most out of your investment in an air purifier, follow these tips: Put it in your most used room: To maximize the benefits of your air purifier, place it in the room where you spend the most time. Keep windows and doors closed: While running your air purifier, keep windows and doors closed to prevent outside pollutants from entering your home. Clean and replace filters: To ensure optimal performance, clean or replace the filters regularly according to manufacturer’s instructions. Over time, filters become clogged with pollutants they have captured, reducing their effectiveness. Use other asthma management strategies: An air purifier is just one part of managing asthma symptoms. Take medication as prescribed by a doctor and avoid known triggers to stay on top of your condition. Making the Right Choice for Your Asthma Management Choosing the right air purifier is crucial for managing asthma and COPD symptoms. People with asthma or COPD can have difficulty breathing due to various triggers, including allergens, pollution, and irritants in the air. An air purifier can help remove these triggers from the air, improving lung health and quality of life. Consulting with a doctor is essential in developing an effective treatment plan that includes the use of an air purifier if necessary. While not everyone with asthma may require an air purifier, it can be a good idea for those who live or work in areas with poor air quality. According to the American Asthma and Allergy Foundation (AAFA), using an air purifier as part of a whole-house approach to improving indoor air quality is recommended. When choosing an air purifier, look for models that are efficient and have a high CADR (Clean Air Delivery Rate) for optimal performance. The CADR measures how quickly the unit filters out pollutants from the room’s atmosphere. Higher CADR ratings indicate faster filtration rates; thus, they’re ideal for larger rooms or spaces where pollutants are more concentrated. In addition to using an air purifier, there are other steps people can take to manage their asthma effectively. For instance: Identifying and avoiding triggers: People should learn what triggers their asthma attacks and do everything possible to avoid them. Common triggers include dust mites, pollen, mold spores, pet dander, and smoke from cigarettes or fireplaces. Medications: There are several medications available that can help prevent or reduce asthma symptoms. Regular exercise: Physical activity helps improve lung function by strengthening respiratory muscles. Quit smoking: Smoking worsens asthma symptoms; therefore quitting smoking is critical in managing this condition effectively. Keeping indoor humidity levels low: High humidity levels promote mold growth which could trigger asthmatic reactions; hence keeping indoor humidity levels between 30-50% is recommended. Read our review of the Best Air Purifiers for Asthma Read more Maintenance and Cleaning of Air Purifiers To clean your air purifier’s filters, turn off the unit and unplug it from the power source. Then remove the filters according to the manufacturer’s instructions. Depending on the type of filters your unit uses, you may need to vacuum or wash them. For HEPA filters, gently vacuuming them using a soft brush attachment is usually sufficient. However, if they are particularly dirty or clogged, washing them with water may be necessary. Be sure to let them dry completely before reinserting them into your unit. In addition to cleaning the filters regularly, you’ll need to clean your air purifier’s exterior periodically. Dust can accumulate on the surface of your unit over time which can affect its performance and longevity. You can use a damp cloth or microfiber cloth to gently wipe down all surfaces. Costs of Air Purifier Maintenance While regular maintenance and cleaning are essential for the optimal performance of air purifiers for asthma relief, there may be additional costs associated with this upkeep. For example, some units require replacement filters every three months or more frequently if you have pets or allergies, which can add up over time. Some air purifiers also consume more energy than others due to their fan speed settings and overall design, so you should research different models before purchasing one to make an informed decision based on your needs and budget. Additional Strategies to Improve Indoor Air Quality Improving indoor air quality is essential for managing asthma and reducing exposure to common triggers. In addition to using an air purifier, implementing these strategies can further minimize allergens and pollutants in your home. Reduce Household Dust and Allergens – Regularly vacuum carpets, upholstery, and rugs using a HEPA-filter vacuum. Wash bedding frequently in hot water and use allergen-proof covers on pillows and mattresses. Control Humidity to Prevent Mold Growth – Keep indoor humidity levels between 30-50% using a dehumidifier or air conditioner. Fix leaks promptly and ensure bathrooms and kitchens are well-ventilated to prevent mold buildup. Improve Ventilation for Better Air Circulation – Open windows when weather permits to allow fresh air in and help remove indoor pollutants. Use exhaust fans in kitchens and bathrooms to reduce moisture and odors. Avoid Indoor Pollutants – Refrain from smoking indoors and minimize the use of candles or incense. Choose natural, fragrance-free cleaning products to reduce exposure to harsh chemicals and volatile organic compounds (VOCs). Conclusion If you suffer from asthma, an air purifier can be a valuable addition to your home. But while an air purifier can help manage asthma symptoms, it should not replace other forms of treatment prescribed by your doctor. When choosing a unit, consider the type of filter it uses, its coverage area, and any additional features it may have. Remember to follow the manufacturer’s instructions for maintenance and cleaning to ensure optimal performance over time. By investing in a high-quality air purifier designed for asthma relief, you can take control of your indoor air quality and manage your asthma symptoms effectively. AirPurifier.com’s Top Recommendations for Asthma Alen BreatheSmart 75i Buy Now AllerAir AirMedic Pro 5 HD Buy Now Austin Air HealthMate (HM400) Buy Now Honeywell Allergen Plus HPA200 Buy Now RabbitAir MinusA2 (SPA-780A) Buy Now Learn more about our top recommendations for air purifiers for asthma More Asthma Articles What Makes Asthma Worse? Can Asthma Turn Into COPD? Does Asthma Get Worse with Age? Signs and Solutions What Are the Worse Months for Asthma? Does Caffeine Help Asthma? Allergic Asthma: Causes, Symptoms & Treatment Content on this site is for reference and information purposes only. Do not rely solely on this content, as it is not a substitute for advice from a licensed healthcare professional. AirPurifiers.com assumes no liability for inaccuracies. Consult with your doctor before beginning any medications or programs.