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what is air filter

HVAC

The answer to 'what is an air filter' is an air filter is a device used in heating, ventilation, and air conditioning (HVAC) systems to remove dust, pollen, and other airborne particles from the air. Air filters are designed to improve indoor air quality and protect HVAC equipment from damage caused by debris buildup.

Air filters come in a variety of sizes, materials, and efficiencies to suit different HVAC system requirements. The most common types of air filters are pleated filters, fiberglass filters, and high-efficiency particulate air (HEPA) filters. Pleated and fiberglass filters are the most affordable and widely used, while HEPA filters provide the highest level of filtration but are more expensive.

Sources

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ENERGY STAR• authority
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Step-by-Step Guide

  1. 1

    Locate the air filter

    The air filter is typically located in the return air duct or the air handler unit of your HVAC system.

  2. 2

    Measure the filter size

    Measure the length, width, and thickness of the existing filter to ensure you purchase the correct replacement.

  3. 3

    Replace the filter

    Carefully remove the old filter and insert the new one, making sure it fits snugly in the filter slot.

Frequently Asked Questions

How often should I change my air filter?

Most HVAC experts recommend changing your air filter every 1-3 months, depending on factors like home size, number of occupants, and pet ownership.

What size air filter do I need for my HVAC system?

The size of the air filter you need depends on the dimensions of your HVAC system's filter slot. Measure the length, width, and thickness of the existing filter to ensure you purchase the correct replacement.

Can I clean and reuse my air filter?

Some types of air filters, like permanent filters, can be cleaned and reused. However, disposable pleated or fiberglass filters should be replaced when they become dirty, as cleaning them can damage the filter media.

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