The High Efficiency Particulate Air, or HEPA, filter, was created to protect scientists from radiation as they developed an atomic bomb during World War II. Today these filters are often used in hospitals, science labs and even homes.
HEPA filters are rated to remove 99.97 to 99.99% of particles measuring 0.3 microns and greater. This includes pollen, dirt and dust. A HEPA air cleaner with activated carbon filters can catch chemicals, odors and smoke.
These filters have a MERV rating of 1721, depending on the brand. This rating shows how well a filter can pull out pollutants from the air.
Because of their high-efficiency filtration abilities, HEPA filters are deep and can limit airflow. It’s important to ask Norrell Service Experts to confirm your heating and cooling system can run with one.
Media air cleaners are much thicker than basic air filters. They’re often four to five times wider—or more. This barrier attaches tightly against your HVAC system.
Because its functional surface is usually around 10 inches, media filters are able to trap about 95 percent of particulates.
These filters stay fresher longer too, typically between three to six months.
There are a few electronic filtering systems you can add in your home.
An electrostatic filter uses magnetically charged material to catch particles. These washable filters are 97 percent effective at removing tiny particles from your home’s air. Plus, they’re also 30 times more effective than regular filters.
An electronic air cleaner applies a high-voltage magnetic charge to trap particles.
Some can eliminate the majority of indoor air pollutants—particles, germs, bacteria, chemical odors and vapors—by up to 99.9 percent. And minimize ozone, a known lung irritant, created elsewhere in your home.