
GermGuardian FLT4850PT
Score: 82/100
Honeywell HRF-R1
Score: 85/100Rankings

The Honeywell True HEPA Replacement Filter (HRF-R1) is an OEM filter designed for specific Honeywell air purifier series, capturing 99.97% of particles at 0.3 microns. It requires annual replacement and may necessitate purchasing multiple units per machine, which increases overall cost. Ideal for allergy sufferers owning compatible Honeywell units who prioritize warranty compliance.

The GermGuardian FLT4850PT is a True HEPA replacement filter with Pet Pure® treatment, designed to capture 99.97% of particles down to 0.1 microns while inhibiting microbial growth. It features an activated carbon pre-filter for odor control but lacks independent certification. It is ideal for pet owners with compatible 22-inch tower purifiers.
| Attribute | ![]() | ![]() |
|---|---|---|
6 months | 12 monthsbest | |
170 sq_ftbest | — | |
99.97 percentbest | 99.97 percentbest | |
| ↓ lower better | 0.1 micronsbest | 0.3 microns |
| ↓ lower better | 0.35 lbs | 0.25 lbsbest |
1best | 1best |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Compatibility & Fit(1) | ||
Compatible Models | AC4300, AC4300BPT, AC4820, AC4825, AC4870, AC4900, AC4850PT, AC4880, CCDAP4500, AP2200CA | HPA-090, HPA-100, HPA200, HPA300 Series |
Maintenance & Lifespan(1) | ||
Replacement Interval (months) | 6 months | 12 months |
Physical & Packaging(2) | ||
Weight (lbs) | 0.35 lbs | 0.25 lbs |
Dimensions | 1.29 x 15.77 x 4.76 | 1.65 x 10.32 x 6.69 |
Filtration Performance(3) | ||
Minimum Particle Size Captured (microns) | 0.1 microns | 0.3 microns |
Activated Carbon Filter | true | false |
Target Contaminants | dust, pollen, mold spores, pet dander, hair, fur, odors | pollen, pet dander, dust, mold spores, smoke, dust mite debris |

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

No professional reviewer or editor quotes, scores, or analyses appear in search results; information is limited to manufacturer and retailer specs emphasizing superior filtration over generics.
Limited user Q&A indicates confirmed compatibility and praise for effective pet odor reduction.

“I did not understand that I needed THREE filters! ... replacement filters will run you more than half the purchase”




Professional reviewers and editors lack dedicated reviews for these replacement filters.
Everyday consumers generally praise the filters for working as expected in reducing allergens and providing reliable performance when paired with Honeywell units.