Genuine Winix Replacement Filter A for C535 P300 - True HEPA & 4

In this review the Genuine Winix 115115 Replacement Filter A is evaluated as a straightforward maintenance item for owners of compatible Winix air cleaners. The bottom line: it is for people who want to restore particle capture and odor control in models such as the C535, 5300-2 and P300 without fuss. The pack combines a True HEPA element and four carbon pre-filters, so the single biggest reason to buy is the combined ability to remove particles down to 0.3 microns while also absorbing odors and VOCs for ongoing indoor air quality maintenance.

Key Features

• True HEPA filtration: Captures 99.97% of particles as small as 0.3 microns to reduce dust and common airborne allergens.
• Four carbon pre-filters: Includes multiple activated carbon pre-filters so you can replace the outer layer seasonally for continued odor and VOC absorption.
• Model compatibility: Designed to fit Winix models C535, 5300-2, 6300-2, AM90, P300 and similar units for a direct replacement experience.
• Maintenance schedule: The carbon pre-filter is intended to be replaced about every three months while the True HEPA element is recommended yearly for optimal performance.
• Easy to replace: The filter set is a like-for-like replacement that restores the original filtration stages without modifications to the air cleaner.

Who It's For

The Genuine Winix Replacement Filter A is best for owners of compatible Winix air purifiers who want a reliable, manufacturer-recommended replacement to maintain particle removal and odor control. It suits households with allergies, pet odors, or routine dust where a combined HEPA and carbon approach matters most.

It is not aimed at buyers who need advanced specialty filters (for example, medical-grade or HEPA H13+ variants) or those who want a single long-lasting combined cartridge beyond the stated replacement intervals; such users should consider alternative filtration options or higher specification filters elsewhere.

Pros & Cons

Pros

• Effective particle removal with a certified True HEPA element that targets 0.3 micron particles.
• Includes four activated carbon pre-filters for ongoing odor and VOC reduction across the year.
• Direct fit for multiple Winix models, making replacement straightforward and tool-free.
• Clear maintenance guidance helps keep purifier performance consistent when followed.

Cons

• Carbon pre-filters require replacement every three months to retain odor control, which is an ongoing cost.
• The True HEPA element is recommended yearly, so buyers should plan for regular purchases rather than a one-time upgrade.

Specifications

Included components	1 True HEPA filter + 4 activated carbon pre-filters
Compatibility	Winix C535, 5300-2, 6300-2, AM90, P300, 5300, 6300
HEPA performance	Captures 99.97% of particles down to 0.3 microns
Carbon pre-filter schedule	Replace every 3 months
True HEPA replacement	Recommended once every 12 months
Primary benefits	Removes dust and allergens; absorbs odors and VOCs

Our Verdict

The Genuine Winix Replacement Filter A is a practical, value-oriented choice for owners of compatible Winix air purifiers who need dependable particle capture and ongoing odor control. With a True HEPA core and multiple carbon pre-filters, it restores original performance when replaced on the recommended schedule and represents good value for routine upkeep.

Frequently Asked Questions

How often should I change the carbon pre-filter?
Replace the carbon pre-filter about every three months to maintain odor and VOC absorption.

How often should I change the True HEPA filter?
For optimal performance the True HEPA filter is recommended to be changed once every 12 months.

Which Winix models will this filter fit?
This replacement fits Winix models including C535, 5300-2, 6300-2, AM90, P300, 5300 and 6300.