
GermGuardian FLT4100 Filter
Score: 85/100
Leemone HEPA Replacement Filter
Score: 78/100Rankings

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.

The Leemone AER1 filter set is a cost-effective third-party replacement for Holmes and Bionaire purifiers, featuring H13 True HEPA filtration and carbon booster pre-filters. It offers a direct fit and high efficiency but lacks independent verification of its claims. It is ideal for budget-conscious users needing frequent replacements for pet dander and odor control.
| Attribute | ![]() | ![]() |
|---|---|---|
6 months | 12 monthsbest | |
99.97 percentbest | 99.97 percentbest | |
| ↓ lower better | 0.1 micronsbest | 0.3 microns |
3best | 2 | |
| ↓ lower better | 0.2 lbsbest | 0.6 lbs |
1 | 6best |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Compatibility & Fit(1) | ||
Compatible Models | AC4100, AC4100CA, AC4175, AC4175W, AC4150P, AC4150BL, AC4150B, AC4150PCA, AC4150BLCA | Holmes HAP240, HAP242, HAP412, HAP422, HAP424, HAP702, HAP706, HAP716, HAP1702, HAP2400, HAP9240-HAP9243, HAP9412; Bionaire aer1-ready |
Maintenance & Lifespan(1) | ||
Replacement Interval (months) | 6 months | 12 months |
Physical & Packaging(3) | ||
Weight (lbs) | 0.2 lbs | 0.6 lbs |
Dimensions | 1.5 x 8.25 x 4.62 | 10 x 2 x 10 |
Package Quantity | 1 | 6 |
Filtration Performance(5) | ||
Filtration Standard | True HEPA | H13 True HEPA |
Minimum Particle Size Captured (microns) | 0.1 microns | 0.3 microns |
Filter Stages | 3 | 2 |
Target Contaminants | dust, allergens, bacteria, wildfire smoke, VOCs, pet odors | Dust, pet dander, pollen, mold, hair, lint, pets, cooking, smoking |
Pre-Filter Type | Pre-Filter | Carbon Booster |

Products in the top-left offer the best value (high score, low price).

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.




Professional coverage of the Leemone AER1 filter is sparse, with no major outlets like Wirecutter or Consumer Reports reviewing it specifically. Claims rely on manufacturer specifications and comparisons to official Holmes filters. One YouTube review of a similar third-party filter (Colorfullife) deemed it a worthwhile upgrade if it matches original Holmes filters, praising fit and initial filtration but noting the need for ongoing comparison.
User feedback is limited in search data, with no aggregated ratings or detailed testimonials provided. Common implied praise from product pages includes effective odor reduction and allergen capture, keeping purifiers at full capacity. A satisfaction guarantee is noted positively by users. Recurring complaints are not explicitly detailed, but potential issues include fit variability or reduced longevity compared to OEM filters due to its third-party nature.