Winix 5500-2 True HEPA Filter Replacement

As an Amazon Associate I earn from qualifying purchases. Updated: March 18, 2026

The True HEPA Filter in your Winix 5500-2 air purifier captures microscopic particles like dust, pollen, pet dander, and smoke, helping to improve indoor air quality. Over time, these filters become clogged with trapped particles, reducing their effectiveness. Replacing the filter regularly ensures your purifier continues to operate at peak performance. Delaying replacement can lead to reduced airflow, diminished air purification, and potential strain on the device's motor.

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Key Features & Benefits

Function: Removes microscopic particles from the air, improving air quality.
Signs it needs replacing: Reduced airflow, decreased odor removal, visible dust buildup on the filter.
OEM vs aftermarket: OEM filters guarantee compatibility but are often pricier. Aftermarket options can be more affordable but always double-check compatibility and reviews before purchasing.
Installation: Generally straightforward, involving removing the old filter and inserting the new one according to the user manual.
Replacement schedule: every 12 months
Compatibility warning: Always verify part number 115115 matches your exact model (5500-2) before ordering

Pros & Cons

Pros

✓ Restores device to original performance without buying a new unit
✓ Significantly cheaper than a full device replacement
✓ Multiple options available from OEM and aftermarket sellers

Cons

✗ OEM parts cost more than third-party alternatives
✗ Wrong part number will not fit — model verification is essential

Common Use Cases

Scheduled maintenance: replacing on the every 12 months schedule
Performance restoration after noticing reduced output or efficiency
Preventive replacement before a worn part causes secondary damage

Who Should Buy This

This replacement filter is ideal for Winix 5500-2 owners who notice reduced air purifier performance or want to proactively maintain their device.

Not ideal for: If your air purifier is significantly outdated, malfunctioning beyond the filter's performance, or you are looking for advanced features, a new unit might be a better investment.

Good to Know Before Buying

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Always confirm your exact model number (5500-2) before ordering. Part numbers vary between model variants and production years. Check the label on your device or original documentation to be sure.

Frequently Asked Questions

What is the part number for the Winix 5500-2 True HEPA Filter?

The part number is 115115. Always verify this matches your exact model (5500-2) before ordering, as similar models may use different parts.

How often should I replace the True HEPA Filter on my Winix 5500-2?

every 12 months

Will aftermarket True HEPA Filter replacements work in my Winix 5500-2?

Third-party parts are widely available and often cheaper than OEM. Look for listings that specifically mention compatibility with model 5500-2 and check buyer reviews for fit confirmation before purchasing.

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