Guide To Measuring Your Air Filter

It is important to make sure that the air filter you choose is the correct size for your HVAC system in order to ensure that it operates properly. Improper fit of the filter can negatively impact the efficiency of your system, resulting in low air quality and possible health issues for every member of the residence. Moreover, this can lead to higher energy costs because it puts additional pressure on your system and increases the growth of dust, allergies, and other pollutants that are harmful to everyone's health and comfort.

In this guide, we will cover everything that you need to know about measuring your air filter. You will discover the various kinds of air filters that are available, as well as how to measure one for your HVAC system properly. We will also discuss how choosing the correct size can extend the life of your system and the importance of routine filter cleaning. By the time you finish, you will be prepared to choose the correct filter to maintain your HVAC system operating at its optimum level, your air quality, and your energy expenses.

Various Kinds Of Air Filters

Choosing a suitable air filter for HVAC systems is important for preserving system efficiency and indoor air quality. The various kinds of air filters are listed below, each with specific features.

1: Pleated Filters: Pleated filters are formed from folded fabric, typically cotton or polyester, to expand the surface area of the filter. The more pleats present, the more effective they are at collecting allergens, mildew spores, and pet dander. Even though they are more expensive than fiberglass filters, they provide higher air quality and are available in both reusable and disposable forms.

2: Fiberglass Filters: Fiberglass filters, also known as flat-paneled filters, are created from spun glass fibers that are held up by a metal frame. Their affordability is one of the reasons they are so popular with consumers. But they don't do much to enhance indoor air quality as they mostly collect bigger particles like dust and pollen.

3: HEPA Filters: One of the greatest filters that eliminate particles from the air is the HEPA (High-Efficiency Particulate Air) filter. Up to 99.97% of contaminants, including germs, viruses, mold, dust, and pollen, can be removed by them. Although these filters are more expensive than other options, they are excellent for people who have respiratory issues or allergies.

4: Electrostatic Filters: Using a mixture of paper fibers and cotton, electrostatic filters generate a static charge that captures particles when they pass through. These filters come in flat and pleated forms, as well as washable and disposable varieties, and are perfect for those with allergies.

5: UV Light Filters: UV light filters are beneficial to your home since they use UV light to destroy viruses and bacteria in the air. However, since they are unable to get rid of dust or other contaminants, they are usually used together with other filters, such as HEPA filters.

6: Washable Filters: There are flat and pleated types of washable filters, which are reusable and can be cleaned. Although they are more expensive initially, they end up saving you money in the long term and are environmentally friendly as well. To prevent mold formation, they must be fully dry before being reinstalled and require routine cleaning to maintain their efficacy.

7: Media Filters: Media filters provide a huge surface area for capturing particles as they are made of pleated material sealed in a metal frame. They require minimal maintenance, have a two-year lifespan, and are seven times more efficient than ordinary filters. For those who live in manufacturing regions or have health issues, these sorts of filters are an appropriate option.

Look For Air Filter Measurements On The Side Of The Filter

When choosing or changing an air filter, you must confirm the measurements indicated on the filter's side. A majority of filters display two sizes at the edge. The larger number, referred to as the "nominal" size, is a general reference size that is written in a large font. The "actual" size, indicated by a smaller number next to it, provides the exact measurement of the filter. To make sure that the filter fits your HVAC system properly, it is important to know the exact size. Verifying these dimensions helps you avoid bad fit issues and maintains the efficiency of your system. Even small differences in filter size can affect your HVAC system's performance, so always use these numbers to choose the right size.

Air Filter Measurements: Nominal Size vs. Actual Size

It's necessary to understand how to differentiate between nominal and actual sizes when purchasing new air filters for your HVAC system. By using these two measurements, you can be sure that the filter you purchase for your HVAC system fits properly, increasing efficiency and maintaining the quality of the air inside your house.

• Nominal Size: The filter's nominal size is its approximate measurement, rounded to the closest inch. This size is usually displayed on the filter's packaging, making selection and identification simpler. A filter might, for example, have the label 18x20x4, which indicates that its nominal sizes are 18 inches by 20 inches by 4 inches. It should be acknowledged that this is a rough estimate and that the actual size might vary a little.
• Actual Size: The actual size of the filter is the true measurement, which is referred to as its exact size. You can determine the exact length, width, and thickness of the filter by taking a direct tape measure estimate. For example, a filter that is marked as 18x20x4 might measure 17.5 by 19.5 by 3.75 inches.

Steps To Measure Your Air Filter Dimensions

For best performance and efficiency, make sure your HVAC system has a correct size air filter. Here is a brief guide that will help you precisely measure your air filter:

Step 1: Turn Off Your HVAC System: Turn off your HVAC system first. By doing this, you will be able to work on the filter without worrying about particles getting pulled into the system.

Step 2: Find Your Current Filter: Find out where your air filter is set up. It is usually located in the furnace, air handler unit, or return air grille. It becomes easier to remove it if you know where it is placed.

Step 3: Remove The Existing Filter: Remove the currently installed air filter from its slot with caution. Pay attention to where it is placed, particularly if it includes arrows indicating the direction of the wind.

Step 4: Measure The Filter’s Length And Width: The total length of the filter should be measured from top to bottom using a tape measure. Next, determine the width of each side. Note that these measurements are in inches. You can find a filter that fits properly by using these specifications.

Step 5: Measure The Thickness: At this point, measure the filter's depth or thickness. The measurement indicates the difference between the two sides of the filter. Make sure to record this measurement as well.

Step 6: Double-Check Your Measurements: Check that the measurements you took are correct by reviewing them again. Remember that the sizes of filters are both nominal and actual. For labeling purposes, the nominal size is a rounded number, and the actual size is the exact measurement of the filter.

Step 7: Choose The Right Replacement Filter: Make sure the replacement filter you choose matches the nominal and actual sizes of your existing filter by taking measurements. This makes sure that the air filter works well and fits correctly.

Step 8: Install The New Filter: As you place the replacement filter into the housing, make sure it fits properly and matches with any airflow direction signs. Restart your HVAC system after it's been installed correctly.

Most Common Air Filter Sizes

Choosing The Right Fit Can Make Your System Last Longer

The key to extending the life and improving the performance of your HVAC system is choosing a suitable air filter. A properly sized filter efficiently captures dust, debris, and other particles, allowing the smooth operation of your system. By doing this, accumulations that could stress your system and result in expensive repairs or a shorter lifespan are avoided. A correctly fitted filter additionally makes sure that air passes through it efficiently, reducing the strain and energy consumption of your system. Your HVAC system will keep running more effectively for many years if you choose a filter that is compatible with its requirements. This will also protect your investment and improve the quality of the air.

Conclusion

Making sure your air filter fits properly is crucial for keeping your heating, ventilation, and air conditioning (HVAC) system working well. This simple guide will show you how to measure your filter correctly so that you can choose the right size. Getting the right-sized filter is important because it helps to maintain good indoor air quality and prolongs the life of your HVAC unit. Make sure to measure carefully and consider both the nominal and actual sizes when selecting a new filter. If you need high-quality HVAC air filters, we can help! At Custom Filters Direct, we offer top-quality filters that provide dependable filtration solutions, keeping your HVAC system in top shape. Contact us today at 1-877-958-5612 to learn more about our products and how they can enhance the efficiency and performance of your home or business HVAC system.

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