How to Choose the Best Air Purifier If You Have Asthma.

HEPA (high-efficiency particulate air) purifiers

HEPA purifiers have pleated filters that trap tiny air particles. With the assistance of a fan, the air is pushed through the filter capturing allergens and pollutants and then pushing out cleaner air. HEPA filters are very effective for large particles like pollen, pet dander, dust, smog, and smoke. However, they only trap the particles — they do not kill bacteria or mold spores.

HEPA filters also do not capture chemicals, paint fumes, viruses, pet odors, or molecules that have evaporated into the air. In some products, the filters are washable rather than disposable. This could save you a few dollars in the long run. Other products require that the filter be thrown away and replaced. How frequently the filter needs to be replaced will depend on the brand and model, how often you’re using it, and the volume of particles it’s filtering. Generally speaking, checking it once a month is a good idea.

Electrostatic cleaners

https://www.minisplitwarehouse.com/

This type of air purifier uses electrically charged plates to trap particles. Air is drawn in over an electronic cell and particles in the air are electrically charged so they stick to a series of collector plates in the unit. Depending on the size of the area and unit, you may have to clean these plates daily or weekly. It’s important to note that some of these units may also produce ozone, which, ironically, can be an irritant for those with asthma or COPD.

Ionizers

These units give off electrically charged ions that attach to air particles in the room and make them cling to your curtains or shades, walls, or ceiling tiles instead of floating around the room.

Purification rate

HEPA air purifiers are typically considered the best option for those with asthma, but your healthcare provider will help you make the final decision. In general, HEPA filters are popular because they can capture particles as small as 0.3 microns, cleaning the air of 99.7% of allergens that pass through it. For instance, this means that for every 10,000 particles that come in contact with the filter, only 3 are allowed to pass through and return to the air. Other systems have varying particle filtration rates that may not be as high as HEPA units.

Clean air delivery rating (CADR)

Many air purifiers come in a variety of sizes. To determine the correct size unit for your home, it’s essential to match the square footage of your space with the defined range of the product. Do that by determining the square footage and then dividing that measurement by 1.55. This will give you the minimum clean air delivery rating (CADR) to look for when assessing a unit. For example, if an area is 200 square feet, the minimum CADR you need is 129. You can use a unit in the area with a higher CADR. Keep in mind you may need multiple products depending on the room size. You may also use a larger unit in a central location like a combination family/kitchen/living area.

https://www.heatair.org/