Aprilaire #213 MERV 13 Replacement Filter, 2-Pack

The factory-original Aprilaire #213 is an accordion-style filter that ships flat for easy storage and slides into place using the Aprilaire interlock rail system. Here’s some information about the functionality:

• MERV 13 filtration captures common airborne allergens passing through the filter, including dust, pollen, mold spores, bacteria, pet dander, and dust mites.
• Captures 93% of airborne viruses that pass through the filtering system
• Deep-pleat design creates minimal airflow resistance.
• Nominal dimensions: 20" x 25" x 4"
• Fits Aprilaire whole-house air purifier models 1210, 1620, 2210, 2216, 3210, and 4200
• Can fit Aprilaire model 2200 after installation of the #1213 rail upgrade kit
• Factory-original OEM product

Fits In These Systems:

Additional Information

Interested in the performance statistics behind this air filter? Review our Media Comparison Data for a detailed breakdown.

The Aprilaire #213 is a deep-pleated MERV 13 media filter made for specific Aprilaire whole-house air purifier systems. The factory-original filter has a nominal size of 20" x 25" x 4" and is installed using Aprilaire’s interlock rail system.

Unlike a standard 1-inch furnace filter, the #213 is designed for compatible Aprilaire media air cleaner cabinets. Check the air purifier model and existing filter number before ordering a replacement.

Which Aprilaire Systems Use the #213 Filter?

The factory-original Aprilaire #213 fits the following Aprilaire whole-house air purifier models:

• 1210
• 1620
• 2210
• 2216
• 3210
• 4200

The #213 can also fit an Aprilaire model 2200 after the system has been upgraded with the #1213 rail kit.

MERV, or Minimum Efficiency Reporting Value, describes a filter’s ability to capture airborne particles within defined size ranges. The factory-original Aprilaire #213 carries a MERV 13 rating.

As air moves through the filter, the #213 is designed to capture common airborne contaminants such as:

• Dust and pollen
• Mold spores
• Pet dander and dust mites
• Bacteria

The OEM #213 captures 93% of airborne viruses that pass through the filtering system.

How the Deep-Pleat Design Supports Filtration

The Aprilaire #213 uses deep-pleated filter media to provide a large filtration surface within the air cleaner cabinet. This design creates minimal airflow resistance while the filter captures particles moving through the system.

The accordion-style media ships flat and expands during installation into the Aprilaire interlock rail system.

The factory-original #213 is not the only replacement sold by Discount Filters for systems that use this filter number. AIRx also offers aftermarket filters that replace Aprilaire #210 and #213 in MERV 8 and MERV 11 versions.

The AIRx filters use a different construction than the OEM #213. They include gasketing designed to seal against the air cleaner cabinet and door, so their listed dimensions should not be compared with the OEM filter dimensions alone.

Use the air cleaner model and existing filter number to confirm compatibility before purchasing.

Is the Aprilaire #213 Better Than Other Filters?

The Aprilaire #213 provides MERV 13 filtration and is the factory-original filter for the compatible Aprilaire systems listed above. That does not make it the right choice for every filtration need.

For a system that accepts #213 replacements, Discount Filters also sells AIRx MERV 8 and MERV 11 alternatives. The OEM #213 is the choice for buyers who want the factory-original MERV 13 filter, while the AIRx products provide lower-MERV aftermarket choices.

The factory-original Aprilaire #213 has nominal dimensions of 20" x 25" x 4". Nominal dimensions identify the filter size and should be used together with the filter number and air cleaner model when confirming compatibility.

Do not assume that every replacement for the #213 will have identical listed dimensions. For example, Discount Filters lists its AIRx #210/#213 replacements at an actual size of 20¼" x 25" x 3½" because those filters use a different aftermarket construction.

The Aprilaire #213 is designed for longer service than many standard 1-inch furnace filters. Discount Filters generally lists Aprilaire #213 replacement intervals in the 6-to-12-month range, with actual filter life depending on system use and indoor conditions.

Check the filter periodically instead of relying only on the calendar. Heavy buildup on the media or changes in airflow can indicate that the filter needs attention sooner.

Make Replacement Easier With a 2-Pack

This product includes two factory-original Aprilaire #213 filters. Keeping a replacement on hand makes it easier to change the filter when needed without having to place a new order first.

Discount Filters also offers Auto Delivery for customers who prefer to have replacement filters shipped on a recurring schedule.

The OEM #213 uses Aprilaire’s interlock rail system, and this is how to install or replace the filter:

1. Turn off the heating or cooling system.
2. Open the Aprilaire air cleaner cabinet and remove the used filter.
3. Unpack and position the new #213 according to the filter instructions.
4. Slide the filter into place using the interlock rail system.
5. Close the air cleaner door securely.
6. Restore power to the system.

If you are replacing the OEM filter with an AIRx alternative, follow the installation instructions supplied with that filter because its construction differs from the Aprilaire #213.

As a filter collects airborne particles, buildup can eventually affect filtration performance and airflow through the system. Replacing the #213 when needed gives the air cleaner fresh filter media and helps maintain its intended operation.

Regular replacement can help:

• Maintain particle filtration.
• Support proper system airflow.
• Limit accumulated debris on the filter.
• Keep the correct media in the air cleaner cabinet.

The filter should also be installed correctly in the rail system so air passes through the media as intended.

Discount Filters carries the factory-original Aprilaire #213 in single-filter and two-pack quantities, along with compatible AIRx alternatives for buyers looking for other MERV ratings.

This two-pack includes genuine OEM Aprilaire #213 MERV 13 filters and qualifies for Discount Filters’ free shipping threshold. Purchases are also backed by the site’s 100% compatibility guarantee.

Need a different replacement? Browse Aprilaire #213 air filters to compare available options, or explore compatible air filters by brand.