If you’re at all concerned about indoor air quality, then you’ve likely thought of purchasing an air purifier. But shopping for the right one is no easy undertaking. There are a variety of makes and models on the market, some designed for a very specific purpose.
Here, we break down the differences between the five most common filters.
- HEPA Filter
A High Efficiency Particulate Air filter (HEPA) is free-standing model with a cartridge that captures particles as air passes through it. If the aim is to reduce the amount of dust and dander floating around your home, it’ll do the job. Just be sure to do your research. The HEPA rating gets bandied about as a marketing ploy. Look for products labeled “True HEPA” to ensure you’re getting the best filtering technology. True HEPA filters meet standards set by the U.S. Dept. of Energy to captures 99.97% of particles as small 0.3 microns. Other terms you’ll come across include “HEPA-Like” “HEPA-Type.” There is no minimum standard set for these products.
- Air Ionizer
Unlike the HEPA filter, an air ionizer does not capture airborne particles with a filter. Instead, it emits negatively charged particles which cling to positively charged particles, such as dust, allergens, bacteria and smoke. The neutralized particles then precipitate to the floor and furniture. If you don’t mind dusting, this could be the machine for you.
- Electrostatic Filter
Similar to the air ionizer, an electrostatic filter charges particles to remove them from the air. Unlike the ionizer, an electrostatic filter traps the particles within the unit, sparing you from using the feather duster so much.
- Activated Carbon Filter
Another odor-busting machine, an activated carbon filter tackles unpleasant aromas through chemical absorption. The unit contains a bed powdered charcoal which traps impurities, including those produced by common household chemicals and VOCs, leaving only fresh air behind.
- UV Light
Typically affixed to your HVAC system, a lamp zaps passing air with germicidal UV rays, rendering contaminates inert. This is also a good defense against mold, which grows in dark, damp places, i.e. your ducts.
Bottom line: Depending on your needs, anyone of these filters could be a good supplemental purifier to your HVAC system’s filter. Still, the best way to maintain good indoor air quality is to have your ducts professionally cleaned. To schedule an appointment, call 978-681-5023.
Written by Fresh Aire Duct Cleaning