LAST STOCK 18x25x1 EZ Flow Filters 10155.011825 (12 Filters)

SKU: 10155-011825

Sale price$ 89.99

Last Stock / Discontinued Filters

Once they are gone, they are gone for good.

Once these filters sell out they will no longer be available for purchase. The manufacturer AAF Flanders has discontinued this filter model. Inventory is updated to reflect what is remaining in stock with the manufacturer.

Shipping and Special Offers

Free Shipping: On orders $50 and up within the contiguous U.S.
Save 15% on 5 cases or more with promo code: BULK
Please note that the image displayed may not accurately represent the true size of the filters, as we carry a wide variety of HVAC filter sizes.
Need this filter in a different size or depth? Send us a quick email with the exact dimensions and any additional details, and we’ll get back to you with a prompt quote. Click here to send message


Filter Specifications

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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.

Homeowners & Single Filters

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, 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!

Learn More about the Filter Fit Guarantee

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.

Improve energy efficiency

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.

Learn More

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.

Learn More

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.

Example: 21-1/8x32-1/2x1
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, 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 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!

More Information

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.

Subscribe, Save, & Breathe. Keep your air fresh by subscribing to the filter that meets your air quality needs. As a member, enjoy our best pricing per filter and get free shipping in the United States.

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!

Not all products are available for subscription.

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