
Alen HEPA-Pure Replacement Filter
Score: 72/100
GermGuardian FLT4100 Filter
Score: 85/100Rankings

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 Alen TF60 HEPA Pure is a genuine OEM replacement filter for the Alen T500 air purifier, offering medical-grade H13 HEPA filtration for allergen removal. The main limitation is the absence of activated carbon for odor control and the non-washable nature of the filter. It is best suited for allergy and asthma sufferers who prioritize particle capture over odor elimination.
| Attribute | ![]() | ![]() |
|---|---|---|
12 monthsbest | 6 months | |
99.9 percent | 99.97 percentbest | |
| ↓ lower better | 0.1 micronsbest | 0.1 micronsbest |
2 | 3best | |
| ↓ lower better | 0.5 lbs | 0.2 lbsbest |
1best | 1best |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Compatibility & Fit(1) | ||
Compatible Models | Alen T500 | AC4100, AC4100CA, AC4175, AC4175W, AC4150P, AC4150BL, AC4150B, AC4150PCA, AC4150BLCA |
Maintenance & Lifespan(1) | ||
Replacement Interval (months) | 6-12 months | 6 months |
Physical & Packaging(2) | ||
Weight (lbs) | 0.5 lbs | 0.2 lbs |
Dimensions | 5.0 x 2.0 x 16.0 | 1.5 x 8.25 x 4.62 |
Filtration Performance(6) | ||
Filtration Standard | H13 True HEPA | True HEPA |
Filtration Efficiency (percent) | 99.9 percent | 99.97 percent |
Filter Stages | 2 | 3 |
Activated Carbon Filter | false | true |
Target Contaminants | Dust, pollen, mold, allergens | dust, allergens, bacteria, wildfire smoke, VOCs, pet odors |
Pre-Filter Type | Integrated Pre-Filter | Pre-Filter |

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

Alen's official documentation emphasizes its medical-grade H13 HEPA filtration as providing a deeper, thorough clean tailored for dust and allergens, confirming 99.9% capture at 0.1 micron.
Compatible third-party filter sales imply satisfaction through claims of fresh air improvements for pet owners and smokers, along with cost savings from timely swaps.




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.