Have questions? Below are some of the quick answers to our most common questions. You can also view our extensive Knowledge Base which covers everything from order status, filter specific questions, ratings and more.

Filter 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.

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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.

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The best place to start is our filter search page that can be found at the following link.


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.


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 prodctuin times will be listed on the product page and during checkout. Delivery details will be provided in your confirmation email.

We use UPS as our primary standard service carrier, but packages may also ship via USPS, FedEx or if a large order by freight LTL service. 

If you need your filters expedited please contact customer service to see if the plant can accommodate your request.


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!

Here’s how it works. If you have an “oops!” moment measuring your filters and the new one doesn’t fit, simply call us at 866-469-8556 or send an email and we’ll remake that exact same product for you for free within 30 days of the date your order was delivered.* You just cover a small $20 shipping fee, and we’ll get your new remake right out to you.

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My Account

You can login to your account to view your past order and filter sizes at the following link.

My Account

When you place an order with RememberTheFilter.com you are charged at the time of purchase. The main reason for this is most of our filters are custom made after an order is placed and some filters have longer lead times. As an online retailer the credit card authorization that takes place when you checkout is only valid for 7 days. After 7 days we would no longer be able to collect payment - thus not send your filters. If you shop with retailers that do charge after longer periods they most likely save credit card information - we don't save credit card information. 

If at anytime you would like a refund or to make an inquiry regarding your order status please let us know. Our customer service representatives will be happy to help. 

Thank you for your interest in creating a Wholesale Account! RememberTheFilter.com (RTF) is a leading retailer for HVAC filtration from industry best manufacturers like AAF Flanders. RTF is the exclusive retailer/wholesaler of Exact Filters®, the perfect fit for your customers odd filter sizes.

Suitable for many types of businesses not only retailers; hardware stores, commercial properties, school districts, hospitality, HVAC contractors and more. You don't have to be a retailer to gain access to our wholesale website to place orders and manage your filtration needs. Our wholesale site will allow you to make purchases at your discounted pricing for both end users and retailers.

If you are new to RTF, don’t hesitate to contact us with any questions you may have.

To apply please click the following link: https://www.rememberthefilter.com/pages/wholesale 

Click the "My Account / Order Status" link at the top right hand side of our site. Under the login box you'll see a link that says "Forgot your password? Click here". That link will send an email to you with your password.

We made a switch to a new system back in 2017. For some of our customers it made it so they can't login. If you send customer service a quick email we can re-set your password for you.

Our apologies for the inconvenience. We truly appreciate your business.

Please let us know if we can be of any assistance.

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