Air Filters, How Does The Filtering Process Work?

The air filter is a device that removes pollutants from indoor air. A common way to filter the air for purification is to use a counter-rotating fan, typically driven by electricity or a fan powered by the sun. This simple device traps pollutants, bacteria, and other particulate airborne particles that become airborne in your home, office, or car. The air filter removes contaminants and leaves cleaner air behind, making your HVAC system less maintenance and more efficient.

Purifying air from quotidian smog and extra moisture in your home is possible through the use of the Synthetic Airefall (TM) open-loop system.


High-efficiency, self-contained filtering devices are installed on the main supply blower or on their own on an air handler’s ductwork, without the need for complex ductwork. Some manufacturers install their air filtering device on the generator or waste line, letting a factory-certified technician install the unit. Other manufacturers sell air filters for air handlers themselves and then have their HVAC professional integrate the unit into the unit’s system. Other manufacturers of filter air conditioners send out field service technicians to install the filter on your home’s HVAC system as part of their air handler repair program.

Consistency of filtration is great, even with the much slower changes of airflow control of the budget season.

Filters perform best when installed directly on the conditioned airflow line of a central AC unit to tap the filtered air from the return air vents as the moist air enters a normally dry conditioner.

Purifying air from different sources requires different types of filters. For example, on a gas furnace with a movable ventilator or duct, you simply order a filter compatible with the gas furnace that was selected for it at the factory. If the filter is dual flow needs moving air for proper ventilation, you order a multi-flow filter and the unit is designed to deliver filtered air at the rate of one per hour to your system. Some filters also can be used as a combination of filters, taking air from outside the home and putting it through the filter, then second air delivery through the landfill vent to be filtered over again.

Air filter maintenance

In proper air filter maintenance, air filters must be changed periodically for maximum efficiency, to avoid clogging of moving air. If there is a problem with an upstairs filter or a remote warmer filter, it represents a maintenance issue and the air conditioner’s service/filter department may need to be called to assess the problem.

How do air filters work?

Air filters are designed to trap airborne particles such as dust, pollen, and asbestos in either fiber, spun glass, particle, or paper – usually of fiber, spun glass, or paper construction. Air filter assembly consists of a frame, pile/filter media, and a supply duct, then fitted with a filter media including the refrigerant, filtering media or plate/filter media, and a supply duct. The filter frame’s function is to minimize the airflow resistance to the filter media and consequently minimizes atmospheric infiltration. If the device for the air filter does not use a lubrication system to certify constant contact and eliminate operating friction, complexity, and added cost to the system.

Replacing/repairing filter

A filter is a rotating filter that traps airborne pollutants and cleans the supply duct or returns the air duct. A shorter hose will be needed to service the filter, a repairman as needed. See above.

Regular air filter maintenance

Making sure a filter withstands inspection and service

There are air filter contractors in Fairfield who offer services including evaporative filter maintenance. Also, in order to check air filter maintenance isn’t enough by itself. You need to have a wide range of products available to focus on your current air filter maintenance needs. With professional retailers, suppliers, and installers. You can buy self-cleaning disposable filters or re-usable filters, filters made of steel, aluminum, foam rubber, natural surfaces, scrap accumulations, activated charcoal or zinc, and any filters recommended by your HVAC professional such as Fairfield HVAC.