Winix A Air Filter
Score: 88/100
GermGuardian FLT4100 Filter
Score: 85/100Rankings
The Winix 115115 is a genuine OEM replacement filter set featuring H13 True HEPA filtration that captures 99.99% of particles down to 0.003 microns. It includes four activated carbon pre-filters for a full year of odor reduction, though the non-washable design and higher upfront cost are notable trade-offs. Best suited for pet owners and allergy sufferers who prioritize maximum filtration efficiency and warranty compliance.
The GermGuardian FLT4100 is a genuine combination replacement filter featuring True HEPA filtration and activated carbon to capture 99.97% of particles down to 0.1 microns. It simplifies maintenance by combining pre-filter, HEPA, and carbon layers into one unit, though it carries a premium price. It is best suited for pet owners and allergy sufferers seeking warranty-compliant parts.
| Attribute | | |
|---|---|---|
12 monthsbest | 6 months | |
99.99 percentbest | 99.97 percent | |
| ↓ lower better | 0.003 micronsbest | 0.1 microns |
2 | 3best | |
| ↓ lower better | 1.1 lbs | 0.2 lbsbest |
5best | 1 |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Compatibility & Fit(1) | ||
Compatible Models | 5300, 5300-2, 5500, 5500-2, 6300, 6300-2, P300, C535, AM90, C909, 9500, 9800 | AC4100, AC4100CA, AC4175, AC4175W, AC4150P, AC4150BL, AC4150B, AC4150PCA, AC4150BLCA |
Maintenance & Lifespan(1) | ||
Replacement Interval (months) | 12 months | 6 months |
Physical & Packaging(3) | ||
Weight (lbs) | 1.1 lbs | 0.2 lbs |
Dimensions | 16.6 x 14.1 x 2.2 | 1.5 x 8.25 x 4.62 |
Package Quantity | 5 | 1 |
Filtration Performance(6) | ||
Filtration Standard | H13 True HEPA | True HEPA |
Filtration Efficiency (percent) | 99.99 percent | 99.97 percent |
Minimum Particle Size Captured (microns) | 0.003 microns | 0.1 microns |
Filter Stages | 2 | 3 |
Target Contaminants | VOCs, Odors, Particles, Allergens, Smoke | dust, allergens, bacteria, wildfire smoke, VOCs, pet odors |
Pre-Filter Type | Activated Carbon | Pre-Filter |
Products in the top-left offer the best value (high score, low price).
Professional sources emphasize the genuine component advantage, noting that Winix America's official product page highlights engineered optimization for airflow and particle capture. The True HEPA distinction is a key differentiator, with specifications exceeding competitor claims by capturing particles down to 0.003 microns rather than the standard 0.3 microns.
Users consistently report noticeable air quality improvements and appreciate the convenience of a true one-year supply that reduces oversight. Installation is generally described as easy with clear instructions. However, recurring complaints focus on price point shock regarding original pricing, filter availability issues causing frustration during urgent needs, and confusion over model-specific installation requirements for certain units.
Search results do not contain explicit professional reviews or editor evaluations. However, broad retail confidence is indicated by the product being stocked as a recommended genuine replacement at major authorized retailers including Staples, Walmart, Target, Lowe's, and Home Depot. Guardian Technologies emphasizes that using these specific filters maintains product performance and warranty coverage.
Detailed consumer reviews or user testimonials are not available in the provided data. Retailers recommend replacing the carbon filter every three months for optimal odor reduction while the HEPA filter should be replaced every six to eight months depending on usage intensity, suggesting that consumers with high-traffic homes, pets, or smokers may require more frequent replacements.
