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What Size Air Filter Do I Need? - Carrier @ Home

Sep. 09, 2024

What Size Air Filter Do I Need? - Carrier @ Home

Walking down the aisle of your local big box home improvement store, you&#;ll find HVAC system air filters in a large variety of shapes and sizes. From basic, flat fiberglass filters to pleated box-type filters and everything in between, there is seemingly no end to the options. If you show up not knowing exactly what you need, there&#;s a good chance you&#;ll walk out with the wrong one. So, whether you are looking for the same filter size you always bought, or if you are replacing an air filter for the first time, understanding air filter sizes before you go to the store or start browsing online is the key.

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Furnace and air conditioner filter sizes are relatively easy to figure out, but you&#;d be surprised how many folks just guess and get it wrong. Installing the wrong air filter size can damage the filter itself, cause inadequate filtering, restrict airflow, or reduce the life of the filter. On the other hand, correctly installing the right size of an air filter and replacing according to the manufacturer&#;s recommended schedule will help keep your indoor air cleaner and your system operating more efficiently.

That is why answering the question, &#;what size air filter do I need?&#; is so important. In this article we&#;ll cover why air filters sizes are so important, common filter sizes, how to locate sizing information and how to measure for a proper fit. When you&#;re done with this article and want to know more about air filters in general, check out our blog on the subject of &#;All About Air Filters.&#;

Why Are Air Conditioner Filter Sizes Important?

Most heating and cooling systems include some type of air filter, typically located within the indoor HVAC unit near the air circulating fan. Like its name entails, the filter &#;filters&#; airborne particles to provide two main benefits: improving indoor air quality and helping keep the HVAC system operate efficiently. Because furnace and air conditioner filter sizes can vary, it might be tempting to just get something that&#;s &#;close enough.&#; Unfortunately, this can lead to some issues, including:

  • If the filter is too small, it won&#;t catch all the air moving through the system and thus won&#;t filter out all the pollutants it was meant to catch. This can negatively affect the air quality inside your home.
  • An air filter that is too large will have to be forced into the filter compartment, which will damage the filter, meaning that air flow might be compromised, and you will have to replace the filter sooner. If a damaged filter severely restricts airflow, it may even increase your energy bills.

Remember, when you are shopping for filters, if you are paying attention to the MERV rating (you should be!) or any other performance metrics, the only way you&#;ll get the most for your money is by buying and installing the right size for your system. Installing MERV 13 (or the highest MERV rating your system allows without overtaxing airflow) and changing air filters on a regular schedule is the best way to continue maximizing air quality and system efficiency benefits.

Common Air Filter Size Chart

While there are a number of common air filter sizes, every HVAC manufacturer will have their own specific take on &#;standard sizes.&#; These might vary by a half-inch in thickness or more, depending on the brand. Length and width dimensions will also vary based on the size of the indoor unit and manufacturer. In some instances, you might have a filter bracket built right into the ductwork, which may call for a custom size not commonly available &#;off the shelf&#;.

The air filter size chart below shows the 1-inch filter dimensions that Carrier has available for purchase in either MERV 8, MERV 10, or MERV 13 from the comfort of home. Each pack coming with four filters and free shipping. If you&#;re not sure which MERV rating is right for you, please check out: What is a MERV Filter.

Once you have the right sized filter, and the right MERV rating, check out our blog regarding the steps to replace a filter if you need some tips on installing it.

What Size Air Filter Do I Need?

There are a number of simple solutions for answering the question, &#;what size air filter do I need?&#; Here are some examples: 

  • Assuming your existing filter is sized correctly, look to see if the dimensions of height, width, and depth are printed on its frame.
  • Look for the model number on your existing filter&#;s frame.
  • Look at the manual for your indoor unit and see if it lists the correct air filter dimensions.

A properly sized HVAC filter should slide easily into the compartment - you should not have to force into place.

Measuring Air Filter Sizes

If you can&#;t locate sizing information printed on the filter, or you believe your current filter is sized incorrectly, you can always resort to measuring the filter compartment. Using a tape measure, measure the length, width and depth of the compartment and write them down. Use these measurements to select your new filter.

You can confidently use your compartment measurements to select your new filter because manufacturers generally market air filter sizes using what is called their &#;nominal size&#; - the dimensions you&#;ll see listed on the filter packaging or store display. The actual size of the filter will be one-fourth to one-half inch less than the nominal size, so the filter should fit snugly within the compartment.

Shop for replacement filters from the comfort of your home and have them delivered to you for free, available from our product catalog.

Fiberglass vs Pleated Air Filters

When it comes to choosing an air filter, it can sometimes feel overwhelming if you have too many options. After a bit of research, many consumers find themselves at a crossroads: should they go with fiberglass air filters or pleated air filters?

Key Takeaways:

  • Fiberglass vs. Pleated Filters: Consumers often face a choice between inexpensive fiberglass air filters and slightly pricier pleated air filters, each with distinct advantages and disadvantages.
  • Cost Considerations: While fiberglass filters are initially cheaper, their short lifespan and limited filtering capacity can make them more costly in the long run, as they require frequent replacements.
  • Air Quality: Pleated air filters are more effective in improving air quality. They capture a broader range of pollutants, including smaller particles like pollen and pet dander, making them a better choice for those with allergies or respiratory issues.
  • Environmental Impact: Pleated air filters are more eco-friendly, as they can be recycled, whereas fiberglass filters cannot be recycled and are not biodegradable.
  • Long-Term Value: Pleated filters not only provide superior air filtration but also offer better long-term financial value due to their durability and efficiency.
  • Buying Recommendation: For optimal air quality and cost-efficiency, it's advisable to choose pleated air filters from Filterbuy, particularly in bulk, to meet various needs with MERV 8, MERV 11, and MERV 13 ratings.

About Fiberglass Air Filters

Fiberglass filters are made with spun glass that is encased in a cardboard frame. Often, the biggest selling point of fiberglass filters is that they are inexpensive, since the materials that they are made with are highly affordable.

About Pleated Air Filters

Pleated air filters are made from sheets of cotton, paper or polyester that are folded into pleats, thus increasing their surface area. They tend to cost a bit more money&#;on the front end&#;than fiberglass air filters. 

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For more information, please visit Fiberglass Filter Products.

The Two Most Important Factors to Consider

Above all else, the most important factors to consider are the cost of your air filters and the air quality they can provide. 

For many people, they&#;ll want to have their air effectively controlled while not breaking the bank. Initially, fiberglass filters are the less expensive option, but choosing your filters based solely on the initial price does not guarantee quality air for your home.

Which is Better for My Budget?

You can get fiberglass air filters for as low as $1. But&#;to put it bluntly&#;you get what you pay for. Fiberglass filters need to be replaced more often. The surface area for these filters is small and cannot hold as many particles as pleated filters and need to be replaced every month. Because of this, fiberglass filters can actually be more expensive in the long run as you are buying more filters.

What are the Environmental Concerns? 

Unfortunately, the materials used to make fiberglass filters cannot be recycled and are not biodegradable. Pleated air filters, on the other hand, can be recycled upon their disposal, therefore making them the eco-friendlier choice.

The Verdict: So Which Air Filter is Better? 

We say: Pleated air filters, all the way. Fiberglass filters do not trap nearly as many particles as pleated air filters do. Instead, they only pick up larger pollutants that are common in the air of a home, such as lint or dust. This means that material like animal dander, smoke and bacteria are not filtered as effectively. On a 1-16 MERV rating scale, fiberglass air filters typically have a rating of 2-3. 

Pleated air filters don&#;t need to be replaced as often (they typically last 90 days). Pleated air filters provide better overall air quality, with MERV ratings ranging from 7-13. Their increased surface area picks up more debris and pollutants than fiberglass filters, such as pollen and pet dander. And of course, they&#;ll still pick up dirt and dust and other larger allergen debris. This makes pleated filters perfect for those with allergies or respiratory problems.

All of this is to say that not only do pleated air filters work better, they are the smarter financial choice for those looking to the future. 

One More Suggestion&#;

When it comes to stocking up on Filterbuy&#;s air filters, it&#;s a great idea to buy in bulk. We highly recommend pleated air filters over fiberglass filters for use in homes or businesses. We offer pleated air filters in various sizes with MERV 8, MERV 11 and MERV 13 ratings&#;available in any quantity. 

Frequently Asked Questions About Fiberglass vs. Pleated

Are pleated air filters better than fiberglass?

Yes, pleated air filters are better as they capture more particles and improve air quality.

What are the disadvantages of pleated air filters?

Pleated filters are more expensive upfront and can slightly restrict airflow in some systems.

What is the best material for an air filter?

Pleated filters made of cotton, paper, or polyester are considered the best for effective filtration.

Do pleated air filters restrict airflow?

Slightly, but this is usually offset by their superior filtration, making them a good choice overall.

How long do fiberglass air filters last?

Fiberglass air filters typically last about 30 days before needing replacement.

Are fiberglass AC filters safe?

Yes, they are safe, but they are less effective at filtering out smaller particles.

The company is the world’s best Fiberglass Filter Quality Control supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

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