313 Replacement Filter 2-Pack 20x20x4 - MERV 13 Home Air Filter

Our review of the 313 Replacement Filter 2-Pack looks at whether this MERV 13 option is a sensible, affordable swap for owners of AprilAire whole house purifiers. For homeowners who need a straightforward, no-fuss replacement that traps fine dust and preserves airflow, this set delivers the main promise: a compatible, foldable synthetic filter that fits 313-style housings and keeps resistance low. It is best for routine maintenance where value and easy installation matter more than OEM branding or heavy-duty metal-reinforced frames.

Key Features

• Compatible fit: Designed to match 313 replacement size and fit Whole House Models 1310, 2310, 3310, or 4300 so you can install without modifications.
• MERV 13 filtration: The MERV 13 rating captures a high proportion of airborne dust and particulates for cleaner indoor air.
• Synthetic fiber media: Soft, light filter cotton offers low resistance and maintains airflow while providing a long service life.
• Foldable design: The foldable element improves airflow geometry and makes storage and handling easier compared with rigid frames.
• Easy installation: No cardboard or metal reinforcement required, so replacing the element is quick for most homeowners.
• Value pack: Includes two filters which supports a recommended replacement interval of about 6 to 12 months depending on use.

Who It's For

This 2-pack is aimed at owners of the specified whole house air purifier models who want a cost-effective, simple replacement filter that meets MERV 13 performance. It suits households prioritizing routine maintenance, allergy reduction, and preserved HVAC airflow without adding complexity to installation.

It is less appropriate for users who need a rigid metal-framed OEM duplicate or who want unusually long replacement intervals; the foldable synthetic design favors ease and storage over heavy structural reinforcement.

Pros & Cons

Pros

• Good filtration efficiency with a MERV 13 rating to trap fine dust.
• Foldable, lightweight construction that simplifies installation and storage.
• Low resistance synthetic fiber maintains airflow and longevity.
• Two filters per pack provide immediate value for routine replacements.

Cons

• Fit receives mixed feedback from some users, so verify model compatibility before purchase.
• No rigid frame or metal reinforcement for those preferring heavier structural support.

Specifications

Product type	313 replacement air filter 2-pack
Filter size	20x20x4 in (actual 19.4x19.8x4 in)
Compatible models	1310, 2310, 3310, 4300 whole house purifiers
Filtration rating	MERV 13
Material	Synthetic fiber filter cotton
Design	Foldable, no cardboard or metal reinforcement
Package	Includes 2 filters

Our Verdict

The 313 Replacement Filter 2-Pack is a practical, value-oriented option for owners of the listed AprilAire-style whole house units who need dependable MERV 13 filtration and easy swaps. It delivers good particulate capture, low airflow resistance, and simple installation, making it a sensible buy for routine maintenance even if customers seeking a rigid OEM frame should look elsewhere.

Frequently Asked Questions

Will this filter fit my whole house purifier?
It is sized and described as compatible with 1310, 2310, 3310, and 4300 models; measure the existing filter opening to confirm fit.

How often should these filters be replaced?
Replacement is recommended every 6 to 12 months depending on usage and environment.

Does the filter require a frame for installation?
No, the foldable synthetic design installs without cardboard or metal reinforcement.