Learn 4 Types of Whole House Air Filters – How Do They Work?

Electronic filters, unlike media filters, do not need to be replaced, but the aluminum collector plates must be cleaned in soapy water every few months. Ionization, the process of charging particles, may produce tiny levels of ozone, a lung irritant. Installing electronic filters costs $600 to $1,000 and requires a 120-volt electrical outlet.


4. Ultraviolet Filters

People who are primarily concerned about germs should consider purchasing a UV filter. UV filters are typically built-in components that are sold as add-ons to a whole-house electronic precipitator (as in, $400 to $800). Because ultraviolet light kills airborne germs and viruses, hospitals utilize UV air filters in tuberculosis wards.

Of course, the bug must pass through the filter before it can be zapped; UV technology will be useless if someone sneezes in your face.

Do They Help You Feel Better?

In general, air filters perform a decent job of cleansing the air. Do they, however, make you feel better? The medical decision is still pending. According to Andrew Filderman, M.D., a pulmonary specialist in Rockport, Maine, there have been no controlled studies on the matter.

“We know these things filter stuff, but we’re not sure if they help,” he explains.


“It’s difficult to prove because there are so many inflammatory things in the air, and you never know what’s causing the problem.”

According to Dr. Filderman, while some allergy or asthmatic patients claim advantages from air filters, the proof is still anecdotal.

“It’s not unreasonable to attempt a filter if source control and ventilation don’t help,” he says.