Discover the Easiest Way to Install a New Furnace Filter of All Sizes

Are you tired of struggling to install a new furnace filter? Do you ever find yourself questioning whether you’ve put the new filter in correctly? Don’t worry – you’re not alone. Changing a furnace filter can be confusing and frustrating, but it doesn’t have to be.

In this article, we’ll introduce you to the easiest way to install a new furnace filter, regardless of the size. We’ll walk you through the step-by-step process, so that you can feel confident that you’ve done it correctly.

Not only will this method save you time and hassle, it will also ensure that your furnace is running efficiently and cleanly. So why wait? Let’s get started on discovering the easiest way to install a new furnace filter for all sizes.

1. Determine the Right Size of Your Furnace Filter

Before starting any installation process, it is essential to know the exact size of your furnace filter. It is important to ensure that you select the right size to guarantee that your furnace operates smoothly and efficiently. You can easily check the size of your current filter by checking the dimensions printed on the filter itself or by consulting the owner's manual. If you don't have the manual, check with the manufacturer or contact a professional HVAC technician to help you determine the right size.

Once you've got the correct size, you can choose your preferred filter type. Some popular types include pleated, electrostatic, and high-efficiency particulate air (HEPA) filters. These filters can vary in price and quality, so be sure to choose the one that suits your individual needs and preferences. Remember, a high-quality filter can help improve the air quality in your home!

Now that you have determined the size and type of filter you need, it's time to install the new filter. To do this, turn off the furnace and locate the filter compartment. The filter compartment may be found in the blower compartment or in the return air duct. Slide out the old filter and insert the new one, making sure it fits snugly in place. Then, turn the furnace back on and enjoy your newly installed and efficient furnace filter!

Installing a new furnace filter may seem intimidating, but it is a quick and easy process that can significantly improve indoor air quality and furnace efficiency. So, take some time to determine the size and type of filter you need and then follow these simple steps to enjoy the benefits of your new furnace filter.

Replacing your Furnace Filter: Simple Steps for Keeping Your Home Comfortable

Regular furnace maintenance is crucial for keeping your home comfortable and healthy. Replacing your furnace filter is a simple but essential task that can make a big difference in indoor air quality and energy efficiency. Here are five simple steps to follow:

Step 1: Turn off the Furnace

Make sure your furnace is turned off before you begin. This will ensure your safety and prevent any accidents from happening.

Step 2: Remove the Old filter

Locate your furnace filter and remove the old filter. If you're not sure where it is, consult your furnace manual or contact an HVAC professional. The filter is usually located near the furnace blower or air handler.

Step 3: Insert the New filter

Choose a filter size that matches your furnace's specifications. Make sure the filter arrow matches the direction of airflow in your system. Gently slide the new filter into place, making sure it's snug and tight.

Step 4: Turn on the Furnace and Check the Alignment of the Filter

Once you have inserted the new filter, it's time to turn on your furnace. Check to make sure that the filter is aligned properly and that there are no gaps or leaks around the edges. If everything looks good, you're all set!

By following these simple steps, you can ensure that your furnace is running smoothly and efficiently. Regular filter replacements can also extend the life of your furnace and prevent costly repairs down the road. So take a few minutes to replace your filter and enjoy clean, comfortable indoor air all year round!

The Bottom Line

Installing a new furnace filter may seem like a daunting task, but it doesn't have to be. By following these simple steps, you'll be able to change your filter in no time. Remember, changing your filter regularly not only improves the quality of your indoor air but also helps your furnace run more efficiently. So, don't put it off any longer - take charge of your home's air quality and install a new furnace filter today!

Frequently Asked Question

It's important to know the size and type of furnace filter you need before replacing it. This is because different furnaces require different sizes of filters. Your brand of furnace may need an electrostatic or media filter of a particular size - so make sure to check your old filter for these details.


Replacing your filter regularly can save you money in the long run. It helps your HVAC system become more efficient, and also keeps the air quality high. So, what are the most common furnace filter sizes?


The most popular furnace filters come in the following dimensions: 10x20, 14x20, 16x24, 18x30, 12x12, 14x24, 16x25, 20x20, 12x20, 14x25, 18x18, 20x24, 12x24, 14x30, 18x20, 20x25, 12x30, 15x20, 18x24, 20x30, 12x36, 16x20, 18x25, 24x24 and 25x25. You can use your existing filter as a reference guide to find the perfect size for your furnace. The filter dimensions should be printed on its frame as length x width x height.


In conclusion, it's important to know your furnace filter size before you replace it. Doing so will improve your HVAC system's efficiency and save you money in the long run. Plus, a clean filter is key to keeping your air quality high.

When it comes to furnace filters, exact size matters. If you get a filter that is too small or too big, air will flow around it instead of through it, meaning not all of the air will be filtered. That's why it's essential to use the right size filter for your HVAC unit.


Here's what you need to know: the size of the air filter is typically listed in the big, bold font on the packaging, which is known as the nominal size. This is a rounded-up whole-number version of the actual size, which is written in the fine print on the filter's frame. That's usually 0.25'-0.5' smaller than the nominal size, and the actual measurements of the filter may vary slightly depending on the brand.


In some cases, less common sizes come true to size, meaning the nominal size is the same as the actual size. When that's the case, it's usually noted with “actual size” in parentheses on the filter's frame.


So, the verdict is in: the answer to the question 'Do furnace filters have to be exact size?' is a resounding yes! Be sure to get the right size air filter for your system to ensure it runs smoothly and that you reap all the benefits your filter has to offer.

Are you looking for the best furnace filter? Look no further! Our team of experts at This Old House Reviews have researched the top five furnace filters on Amazon to help you find the perfect one for your HVAC system. Plus, these products are available at local home centers or online retailers like Amazon.


A great furnace filter can make all the difference. It will keep your HVAC system running smoothly, potentially leading to lower electricity bills and better air quality. That's why we've taken the time to compile a list of the best furnace filters for you.


At the top of our list is the Filtrete furnace air filter. It promises to last up to three months and outperform filters made with fiberglass. Plus, it can capture 64% of airborne particles like pet dander and pollen. This filter also comes with instructions for easy installation on HVAC systems that require filters 20 by 25 by 1 inches in size.


Customers love this furnace filter. They find it easy to install, sturdy, and a great value. However, some customers have faced difficulties with Filtrete’s app.


When choosing a furnace filter, make sure to take into account its size, filtration level, and material. That way, you can get the best filter for your specific needs.

Changing or replacing your furnace filter is one of the best ways to maintain a healthy, efficient HVAC system. But you need to make sure that you're using the right filter for your system. Here's a step-by-step guide to help you pick the perfect one!


First, measure the dimensions of your existing filter. This will tell you the length, width, and depth you need. The easiest way to do this is to look at the existing filter and buy the same size.


Next, you need to choose the right MERV rating. The MERV scale ranges from 1-20 and measures the filter's effectiveness at catching particles in the air. The higher the value, the more effective the filter is at trapping particles, but it also means less airflow.


Now it's time to decide on the type of filter. There are many options available, so take some time to research the best type for your system.


Once you have everything you need, it's time to install the filter in your furnace/air handler slot. Remove the old filter to make room for the new one.


Finally, make sure to replace your filter regularly. If it clogs up with dust and particulate, it can reduce airflow and become ineffective.

Furnace air filters are essential for your heating system. You should replace your filter at least once every three months. So, how do you select the best furnace filter for your needs? Let us help you out!


Generally, furnace filters are made up of a cardboard frame, fiberglass filter, and metal mesh. These materials work together to strengthen the filter and protect your HVAC components from dust and debris. Plus, they also help improve the air quality in your home. Without a filter, your HVAC system could become dirty and its performance would suffer.


As air passes through the furnace filter, it traps and catches any contaminants. If you don't replace or clean your filter regularly, it can obstruct airflow and cause damage to your HVAC system. In most cases, you should change your furnace filters every three months. However, you may want to replace them more or less often depending on the situation.