Whole House Air Cleaner | Air Cleaners
House Air Cleaners help eliminate indoor air pollution, which is one of the top five environmental health risks, and one of the best ways to control and eliminate the sources of pollutants is through ventilating your home with clean outdoor air. Weather conditions and the level of contaminants in outdoor air, however, may limit how much or how little you are able to effectively ventilate, so an air cleaning device may be of more use to you. Air cleaners are designed to help remove indoor air pollutants and some can be installed in the ductwork of your home’s HVAC system to clean the air through the entire house. Although not intended for whole-house filtration, a portable air cleaner is very effective for cleaning the air in one room or specific area.
There are many different kinds of air cleaners available with each type designed to remove a specific air pollutant. Mechanical air filters and electronic air cleaners remove particles from the air. HEPA filters (high efficiency particulate air) are mechanical air filters and capture the particles on filter materials. Electrostatic precipitators are electronic air cleaners and use a process called electrostatic attraction to trap charged particles, drawing air through an ionization section where particles get electrically charged. They then accumulate on a collector, or series of flat plates, with an opposite charge.
Gas air filters remove gases and odors through a sorbent which adsorbs pollutants and remove one or more gaseous pollutants from the airstream passing through them. Gas-phase filters may remove a portion of gaseous pollutants on a temporary basis, but they will not reduce concentrations of the pollutants for which they weren’t specifically designed. Some air cleaners, such as ultraviolet germicidal irradiation (UVGI) and photocatalytic oxidation (PCO), use ultraviolet, or UV, light technology to get rid of indoor air pollutants. The ultraviolet radiation renders certain micro-organisms sterile and harmless. Some of these air cleaners use a UV light that bathes the air passing through it, eliminating harmful airborne viruses and bacteria.
HEPA filters meet the Department of Energy standard for removing air particles. It must allow a specific amount of air to flow through. As well as cleaning air of dust particles and allergens in a regular household, advanced HEPA filters are used by the nuclear power industry. Air filters can be expensive and have to be replaced to keep them properly functional, although some filters are washable.