GermGuardian FLT4100 Filter
Score: 85/100
Funmit HPA300 Filter
Score: 75/100Rankings
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 Funmit HPA300 is a budget-friendly, third-party HEPA filter replacement designed for Honeywell HPA300 series air purifiers. It offers standard filtration efficiency but lacks the activated carbon and pre-filters included in some OEM bundles. It is best suited for users seeking affordable bulk replacements for large-room purifiers.
| Attribute | | |
|---|---|---|
6 monthsbest | 4.5 months | |
99.97 percentbest | 99.97 percentbest | |
| ↓ lower better | 0.1 micronsbest | 0.3 microns |
3best | 1 | |
| ↓ lower better | 0.2 lbsbest | 2.8 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 | Honeywell HPA100/200/300/5000 series |
Maintenance & Lifespan(1) | ||
Replacement Interval (months) | 6 months | 3-6 months |
Physical & Packaging(3) | ||
Weight (lbs) | 0.2 lbs | 2.8 lbs |
Dimensions | 1.5 x 8.25 x 4.62 | 7.0 x 5.0 x 10.0 |
Package Quantity | 1 | 6 |
Filtration Performance(6) | ||
Filtration Standard | True HEPA | HEPA |
Minimum Particle Size Captured (microns) | 0.1 microns | 0.3 microns |
Filter Stages | 3 | 1 |
Activated Carbon Filter | true | false |
Target Contaminants | dust, allergens, bacteria, wildfire smoke, VOCs, pet odors | Particles, dust, allergens |
Pre-Filter Type | Pre-Filter | None |
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.
No professional reviews, editorials, or expert analyses of the Funmit HPA300 appear in available sources. Information is limited to retailer listings confirming compatibility with Honeywell models.
Users of similar third-party filters note that using pre-filters extends HEPA life and provides effective odor reduction.
