This filter combines the low resistance, high dust holding capacity of a pleated filter with the odor removing abilities of activated carbon. The base filtration medium is polyester synthetic fiber. It has a generous 100% add-on of activated carbon by weight. (Weight of activated carbon equals the weight of the media to which it is adhered.) As odor producing gases come in contact with the activated carbon in the filter, they are adsorbed...trapped and held in millions of microscopic carbon pores.
MERV Rating: MERV 8
Nominal Size: 18x24x1
Actual Size: 17-1/2 x 23-1/2 x 3/4
Media: 100% synthetic non-woven, proprietary media that can be recycled. Engineered with a gradient density composition that achieves it's MERV rating using the mechanical method of particle capture. Media does not rely on an electrostatic charge to capture particulate, since electrostatic charged filters dissipate over time.
Frame: Heavy-duty, two piece, moisture-resistant frame with diagonal support members. Frame is bonded to the media at all points of contact for unsurpassed frame strength. Interlocking corners and positive media-to-frame seal reduce the possibility of air bypass.
Support Grid: Expanded metal is continuously laminated on the air leaving side to provide pleat stability during operation. Pleat shape is maintained allowing full media utilization which improves dust holding capacity.
Replace: Recommended 90 day changeout
Removes: MERV 8 rating reduces up to 75% of large airborne particles including dust and lint, dust mite debris, pollen, pet dander, mold spores, bacteria and virus carriers.
Quantity: 12 Filters
Part Number: 81255-011824
Millions of High-Quality Filters Sold and Replaced
We express our sincere gratitude to our esteemed customers for their support over 17+ years. As a trusted retailer in the indoor air filtration industry, RTF is committed to providing top-tier service and high-quality filtration solutions. Your satisfaction is our priority.
Perfectly Compatible with HVAC, AC, and Furnace Systems
Ever wondered about the difference between a 'furnace filter' and an 'air conditioner (AC) filter'? Are they two separate filters for your home's heating, ventilation, and air conditioning (HVAC) system, or is it just a single filter serving both functions? The answer is simple—they are indeed the same! The terminology often varies based on geographical location, but rest assured, they refer to the same essential component of your HVAC system.
High-Quality Filters Crafted by Reputable Manufacturers
As an authorized retailer of renowned brands like AAF Flanders, NaturalAire, Exact Filters, EZ Flow, and more, we provide effective filtration solutions to tackle airborne particulates and contaminants in a wide range of settings, from residential to commercial and industrial applications.
Assured Perfect Fit with Our Filter Guarantee
At RememberTheFilter.com, your satisfaction is our top priority. We put in maximum effort to ensure your complete happiness with every purchase. To safeguard this commitment, we offer not just one, but two guarantees. If there's any error with an order, whether it's on your end or ours, we promise to go the extra mile to rectify it!
Enhance Your Energy Efficiency
Cut down on energy expenses and maintenance costs by regularly replacing your air filters, which also enhances the longevity of your HVAC system. High-quality filters not only purify the air you breathe by trapping particles but also facilitate unobstructed air flow, contributing to reduced operational costs.
Frequently Asked Questions
Minimum Efficiency Reporting Value (MERV) is a filter industry standard system that rates the overall effectiveness of air filters. Higher value MERV rating equates to finer filtration, meaning fewer dust particles and other airborne contaminants can pass through the filter. Other common ratings found within certain brands and stores includes FPR, MPR. They all follow the same basic principal, the higher the number the greater overall effectiveness of the air filter.
Choosing the correctly sized air filter is important in order to keep air clean in your home. An improperly sized filter may have limited performance. Determining the proper air filter size can be confusing, since filter packages generally display two sets of dimensions. It is important to understand that these dimension sets are the nominal and actual dimensions of the filter, and differences between the two.
The best place to start is our filter search page that can be found at the following link or at the top of every page.
You can search by filter size, part number, model and more.
Tips: When using our search option to locate your filter size especially for Exact Filters® enter the exact size needed in the format shown here.
No spaces, fractions only 1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8.
Most often there will be an arrow on the side of the filter which will indicate which way to insert the filter. The arrow will show which direction the air is to travel through the filter. If there is no arrow the filter can be installed in both directions.
Remember your filter is designed to protect your system first and foremost. Air should be traveling through the filter before your blower and system.
Furnace, AC and HVAC filters are most often measured in inches. A nominal measurement would be a rounded number like 20x25x1, rounded up to the nearest inch. These filters if measured with a tape measure would likely be closer to 19 ½" x 24 ½" x ¾" which would be the actual true exact size.
At RememberTheFilter.com, we want to make you happy. That’s why we work hard to ensure you’re always 100% completely satisfied with your purchase so you never have to return it. However, in the unlikely event you need to, we’re ready to make it right! For more information on the return policy please visit the "Returns" page.
We get it. Measuring your own HVAC system for custom furnace and AC filters can seem a little scary. But fear not! The RememberTheFilter.com team is here to help you succeed! And if you make a mistake, no worries. With our Filter Fit Guarantee, you can’t go wrong!
All filter orders ship for free in the domestic US. Free shipping is available for addresses inside the 48 contiguous states only. Give us a call at 866-469-8556 or send customer service a quick email if you have questions.
All filter orders ship for free out of the production plant nearest you; FL, NY, OK, IL, CA, NC or WA. Current production times can be found on our lead time page. Delivery details will be provided in your confirmation email.
Not all filters we sell are available for subscription. If filters are available for subscription you will see a dropdown box above the add to cart button.
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Save 20% With Auto-Delivery! Never have to remember the filter again. NaturalAire MERV 8, MERV 10 and MERV 13 AC and Furnace Filter options offer the most convenient way to keep up with regular filter replacement. Ensure you're breathing clean air and your HVAC system is working efficiently for as long as possible. No commitment. Cancel at anytime. Always free shipping!
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Verified Buyer Product Reviews
Have an odd size air filter or need the perfect fit?
If you don't see your filter size listed or you're looking for the perfect fit air filter for your HVAC, Furnace or AC system consider having us make them for you. Air will always take the path of least resistance. A high-quality perfect fit filter can keep your air cleaner and healthier by not allowing any air to bypass the filter and back into your indoor air.