Greta Jimenez
Air pollution is a serious issue, especially for those living near busy roads or highways. Outdoor air pollution can have adverse effects on health, and it is important to find ways to reduce the impact of harmful pollutants. Air purifiers are a popular solution, with HEPA filters being the most common type used to remove pollutants from the air. However, it is important to note that not all air purifiers are equally effective, and some pollutants, such as gases, can be difficult to filter out. While indoor air purifiers can help improve air quality, they do not address the root cause of outdoor air pollution, which continues to harm the environment. Other methods to reduce exposure to air pollution include wearing anti-pollution masks and using extractor fans when cooking.
Characteristics and Values of Filtering Pollution
| Characteristics | Values |
|---|---|
| Air purifiers with HEPA filters | Can remove at least some pollution from traffic |
| Air purifiers with activated carbon filters | Can absorb harmful gases and keep them locked away |
| Air purifiers with multi-level filtration | Can capture contaminants of all sizes, including cooking fumes, dust mites, and pollen |
| Air purifiers with plant filters | Can absorb volatile organic compounds and other pollutants, and monitor temperature, humidity, VOCs, PM 2.5, and CO2 |
| Air purifiers with smart home AI integration | Can continuously evaluate the air quality and adjust their settings accordingly |
| Anti-pollution face masks | Can be airtight and remove particles, but may not remove gases like nitrogen dioxide |
| Extractor fans | Can help reduce indoor air pollution caused by cooking, especially with gas hobs |
| Opening windows | Can improve indoor air quality, but outdoor air pollution can be a problem if living near busy roads or highways |
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What You'll Learn
Air purifiers for home
Air purifiers are a great way to filter pollution in your home. They can capture and remove dust, airborne contaminants, bacteria, and allergens from the air. When looking for an air purifier, it's important to consider room size, certifications, ratings, and the type of filters. Basic HEPA air purifiers can remove some pollution from traffic, but for a more comprehensive solution, look for purifiers with additional features like activated carbon filters, which are essential for removing harmful gases.
One highly-rated air purifier is the Blue Pure 211i Max, which stands out for its powerful performance, energy efficiency, quiet operation, and user-friendly features. It is perfect for bedrooms, playrooms, and living rooms. Another excellent option is the Coway Airmega AP-1512HH Mighty, which reduced heavy smoke pollution in a New York City office by 99.6% in just 30 minutes. It is also worth considering the Winix 5500-2, which captured 99.9% of smoke in a test room in 30 minutes on high.
If you're looking for a purifier for a smaller space, like a bedroom or home office, the Blueair Blue Pure 511 is a great choice and costs less than $100. On the other hand, the Molekule Air Mini+ is designed for small spaces but comes with a hefty price tag of $1,000, and replacement filters are $160.
For those with allergies, the Alen Air BreatheSmart 75i is an excellent option. It works quickly and intuitively, and it effectively removes allergens and strong odors. The Rabbit Air A3 air purifier is another purifier with five filters, including a customizable one, but it requires pricey replacement filters.
Other features to consider when choosing an air purifier include Wi-Fi compatibility, an air quality sensor, a timer, a filter replacement button, and an Eco Mode. Some purifiers, like the Levoit, even have a laser dust scanner that constantly updates the PM2.5 value. It is also important to note that washable pre-filters can be more cost-effective in the long run, as you don't need to buy new ones each time.
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Anti-pollution masks
More sophisticated anti-pollution masks are designed to be more airtight and do remove particles, but they don't filter out gases. For example, nitrogen dioxide can pass right through. Masks that do filter out gases may require uncomfortable amounts of energy to suck air through them, similar to a chemical weapons gas mask.
One example of an anti-pollution mask is the Prana Air N95, which has a highly advanced HEPA filter and a 5-layer filtration system. It provides maximum protection from PM2.5, pollen, dust, and smoke. The battery is rechargeable via micro USB cable, and the fan speed is adjustable depending on the pollution level. The mask weighs 70 grams, and the battery lasts up to 2 hours on a single full charge.
Another option is the 3M N95 mask, which is very affordable (around 5 to 6 RMB per piece) and foldable, making it convenient to carry around. The "N95" label means that the mask can filter out at least 95% of airborne particles larger than 0.3 microns (PM2.5 particles are 2.5 microns in size).
The Respro® Masks are another option that has been on the market for many years and are especially suitable for urban sports, such as biking in heavy traffic. The mask comes with two valves for easier breathing and replaceable filters that last for 69 hours of use. The mask is made of Neoprene, which is stretchable and adaptable to varying facial features, ensuring a good seal and fit.
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Air purifiers for cars
There are a variety of air purifiers available for cars, which can be placed under the seat, in the trunk, or in the cargo area of an SUV. Some purifiers, such as the MobileAir vehicle unit from AllerAir, feature a Super HEPA filter that removes 99.99% of airborne particles, including smog, vehicle exhaust, pollen, dust, and fumes. It is important to note that HEPA filters only remove particles and not gases, so an additional activated carbon filter is necessary to absorb harmful gases like nitrogen dioxide. When choosing an air purifier, ensure it contains a significant amount of genuine activated carbon, as some cheaper units only include a small amount, providing minimal protection.
Another factor to consider is the size of the purifier. While a small, portable purifier may be convenient, it may not be powerful enough to effectively filter the air in your car. It is also important to regularly replace the filters, as they become less effective over time.
In addition to using air purifiers, you can improve the air quality in your car by limiting the air exchange between the inside and outside of the vehicle. Switching to recirculation mode can help reduce the amount of outside air coming into the car, improving the efficiency of the filters. However, it is important to note that while these measures protect you from pollutants, they do not address the broader issue of air pollution, which affects not just humans but also animals, agriculture, and the environment.
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Opening windows
The University of Surrey conducted a study on air pollution in classrooms, which are often exposed to poor outdoor air quality. The study found that alternating the use of air purifiers with scheduled window openings can reduce pollution levels by up to 36%. In classrooms near busy roads, coarse particle pollution fell by 18%, while carbon dioxide levels decreased by 28%. The study emphasizes the importance of tailoring the approach to the specific characteristics and location of the room.
To optimize the benefits of opening windows, consider the timing and duration. Opening windows for short periods, such as 10-15 minutes, can help bring in fresh air while minimizing the entry of outdoor pollutants. Additionally, pay attention to the outdoor air quality. If there is heavy pollution due to smog, forest fires, pollen, or dust, it is advisable to keep the windows closed. On the other hand, if the outdoor air quality is good, opening windows can help ventilate indoor spaces and reduce the concentration of chemicals like VOCs and formaldehyde.
For those who need to keep windows open regularly, there are adjustable window screens available that can filter out pollutants such as smog, emissions, allergens, dust, and pollen. These screens allow you to enjoy the natural breeze and fresh air while protecting against outdoor air pollution. They are easy to install and offer a high level of protection comparable to HVAC systems.
In summary, opening windows can be a valuable strategy for improving indoor air quality, especially when combined with the use of air purifiers. By considering factors such as timing, duration, and outdoor air quality, individuals can strike a balance between ventilation and filtration to create healthier indoor environments.
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Avoid busy roads
Exposure to air pollution from busy roads is linked to a range of adverse health effects, including asthma, cardiovascular disease, reduced lung function, impaired lung development in children, pre-term and low birth weight infants, childhood leukaemia, and premature death. Therefore, it is important to take measures to avoid busy roads and reduce exposure to traffic pollution.
One way to avoid busy roads is to opt for alternative modes of transportation whenever possible. Consider walking, biking, or using public transit instead of driving. This not only reduces your exposure to traffic pollution but also contributes to reducing the number of vehicles on the road, decreasing overall pollution levels.
If driving is necessary, try to plan your route to minimise time spent on congested roads. Use real-time traffic updates or navigation apps to identify less busy routes or travel during off-peak hours when there is generally less traffic. Additionally, keep your car windows closed when driving on busy roads to reduce the amount of pollution entering your vehicle.
When outdoors, try to maintain a safe distance from busy roads. Studies have shown that pollutant concentrations decay with distance from the roadside. For example, a study in Montreal found that NO2 concentrations decreased significantly within the first 200 metres away from a busy highway. Therefore, when engaging in outdoor activities like walking or running, choose routes that take you further away from major roads and busy traffic areas.
Lastly, if you live near a busy road, consider spending more time indoors or in green spaces away from heavy traffic. Sound walls and dense vegetation can help reduce traffic pollution downwind of freeways, so parks or open spaces with ample vegetation might be good alternatives to consider when looking to avoid busy roads.
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Frequently asked questions
You can use an air purifier to filter outdoor air pollution. The most common type of air purifier used to remove pollutants from traffic and other sources is one with a HEPA filter. However, HEPA filters only remove particles and not gases. To remove gases, you need an activated carbon filter.
Air purifiers can also be used to filter indoor air pollution. Some air purifiers, like the Blue Pure 211i Max, capture a full range of contaminants, including cooking fumes, dust mites, and pollen. You can also use an extractor fan, especially if you have a gas hob.
Anti-pollution face masks are designed to remove particles, but they don't remove gases. They can also be uncomfortable and require a lot of energy to breathe through.
You can reduce your exposure to air pollution by changing your commuting pattern to avoid busy roads at peak times. You can also open your windows to improve indoor air quality, as outdoor air usually has a lower concentration of pollutants than indoor air.
