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Where to Get AC Filters

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When it comes to maintaining the efficiency of your air conditioning (AC) unit, one of the most critical components is the AC filter. This essential piece of equipment keeps your AC running smoothly and ensures the air in your home is clean and free from pollutants. But where can you get AC filters? In this comprehensive guide, we’ll cover all the places you can purchase AC filters, as well as provide some helpful tips on choosing the right filter for your unit.


You can purchase AC filters from various online and physical stores. Online stores like Amazon, FilterBuy, Factory Direct Filters, Remember The Filter, and AC Filters 4 Less offer a wide range of AC filters. Physical stores like The Home Depot, Walmart, Lowe’s, and Ace Hardware also carry a selection of AC filters. Ensure you choose the right size and type of filter for your system for optimal performance.

Why AC Filters are Important

The primary purpose of an AC filter is to clean the air and protect the internal components of the HVAC system. As air is pulled into the system, it passes through the filter, which traps dust, debris, mold spores, and other particulate matter. This prevents these particles from accumulating on the system’s internal components and impairing the AC unit’s performance. Regularly replacing your AC filter ensures optimal performance and improved indoor air quality.

When to Replace Your AC Filter

Replacing your AC filter regularly is vital for several reasons. First, clean air filters improve the air quality in your home by removing dust, pollen, dirt, mold, and other pollutants. Second, dirty and clogged air filters force your HVAC system to work harder, which can result in higher energy bills. Third, regularly changing your air filters can extend the life of your unit by reducing wear and tear and preventing unnecessary damage.

Where to Purchase AC Filters

There are several places you can purchase AC filters, both online and in physical stores. Here are some options:

Online Stores

  1. Amazon: As one of the largest online marketplaces, Amazon offers a wide selection of AC filters from various brands and in different sizes and MERV ratings.
  2. FilterBuy: Specializing in air filters, FilterBuy offers a wide range of AC filters for HVAC, furnace, and AC systems.
  3. Factory Direct Filters: This online store provides high-quality air filters for residential and commercial HVAC systems.
  4. Remember The Filter: Offering a wide array of filters, this online store also provides a subscription service for regular filter replacements.
  5. AC Filters 4 Less: This online store offers AC and furnace filters from various brands with free shipping.

Physical Stores

  1. The Home Depot: This home improvement giant offers a wide range of air filters in various sizes and performance ratings.
  2. Walmart: You can find a selection of furnace and AC filters in the home improvement section of Walmart.
  3. Lowe’s: Similar to The Home Depot, Lowe’s carries a range of air filter sizes in-store and online.
  4. Ace Hardware: This hardware store provides a selection of air filters and furnace filters.

Choosing the Right AC Filter

Choosing the right AC filter for your system is crucial for optimal performance. The filter’s size, material, and MERV rating are all important factors to consider. The size of the filter should match the specifications of your HVAC system. The MERV rating, which stands for Minimum Efficiency Reporting Value, tells you the filter’s effectiveness at trapping particles. A higher MERV rating means the filter can trap smaller particles.

Some reputable brands of AC filters include Aerostar, Aprilaire, Filtrete, Lennox, Nordic Pure, and FilterBuy. These brands offer high-quality filters in a range of sizes and MERV ratings.


Whether you choose to purchase your AC filters online or in-store, ensure you select the right size and type for your system. Regularly replacing your AC filter is a simple way to maintain your HVAC system’s efficiency and improve the air quality in your home. Always consult with an HVAC professional if you’re unsure about the right filter for your system.

Frequently Asked Questions

How often should I replace my AC filter?

The frequency of replacement depends on various factors such as the type of filter, the air quality in your home, and whether you have pets. However, a general guideline is to replace your AC filter every 60-90 days for optimum performance.

What is a MERV rating and why is it important?

MERV stands for Minimum Efficiency Reporting Value. It is a rating scale used to measure the effectiveness of air filters at trapping particles. A higher MERV rating indicates that the filter can trap smaller, more specific particles, making it more efficient. It’s important because it helps you choose a filter that can effectively improve your indoor air quality.

Are all AC filters the same size?

No, AC filters come in a range of sizes to fit different HVAC systems. It’s essential to check your system’s specifications or your existing filter for the correct size before purchasing a new one.

Can a dirty AC filter cause damage to my HVAC system?

Yes, a dirty or clogged AC filter can cause your HVAC system to work harder, potentially leading to overheating and other forms of damage. Regularly changing your filter can help prevent these issues.

Can I clean and reuse my AC filter?

While some types of filters are washable and reusable, most common AC filters are disposable and should be replaced when dirty. Always check the manufacturer’s instructions to determine whether your filter can be cleaned and reused.

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