Are all air filters created equal?

Although there are several factors to consider when choosing a filtration system, common concerns for people are allergens.  The more sensitive a person is to allergens, the greater the need for a high-efficiency filtration system.

Efficiency

Efficiency of a filtration system is based on the size of the particles captured by an air filter. The filter's MERV (Minimum Efficiency Reporting Value) number is an industry standard for rating filters. Residential filters typically have an MERV range of one to 12. Higher ratings indicate a more efficient filter. Higher filter efficiency helps clear the air and improve airflow.

Cost

Cost is a factor to consider when purchasing a filter. Purchasing a filter of high quality can save you money over the long term. Inexpensive filters provide poor filtration thus requiring more frequent filter replacement.

Solutions

Filtration systems are designed to remove allergens, particles, bioaerosols and chemicals.

There are many filtration systems available:

• Pleated filters are constructed of fiberglass or synthetic fibers woven into a dense material. The pleats are arranged in V-shaped forms to increase the area of the filter material without increasing the face area. This increases the particle-holding capability.
• Germicidal lights use intense ultraviolet lights designed to sterilize surfaces.
• Electronic air cleaners (EACs) are highly efficient and clean the air by taking recirculated air and passing it through a prefilter that traps large pollutants. Then, ionizing wires give a positive electrical charge to the remaining particles. A negatively charged collecting section collects the particles.
• High-efficiency particulate air (HEPA) filters are also very effective at small-particle removal and purifying your home's air. The carbon and the microbiocide-treated filter removes odor and kills bacteria.