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Strong odors, smoke, and airborne particles can make a standard air-purifier filter feel like the weak link in your setup. The Funmit Core 300-RF-TX Toxin Absorber Replacement Filter is a third-party 2-pack made for several LEVOIT Core 300-series purifiers, with a three-stage design and an activated-carbon layer aimed at odor and gas control. Its biggest appeal is getting two replacement filters plus broad Core 300 compatibility, but you should know that it is not an official LEVOIT filter. This review explains the fit, filtration design, maintenance needs, practical limitations, and who gets the most value from it.
Quick Verdict
Rating: Recommended with caveats
Best For: Core 300-series owners who want a value-focused third-party replacement with extra activated carbon for odors and smoke-related pollutants.
Bottom Line: You get two compatible three-stage filters, a cleaning brush, and a carbon-focused design suited to odor-heavy rooms. The main tradeoff is that Funmit is a third-party option rather than the official replacement recommended by LEVOIT.
| Specification | Detail |
|---|---|
| Brand | Funmit |
| Model / comparison part | Core 300-RF-TX compatible replacement |
| Product type | Toxin absorber air-purifier replacement filter |
| Filtration design | 3-in-1 filtration with preliminary layer, H13-grade HEPA media, and activated carbon |
| Activated carbon | Seller states 60% more activated carbon than its standard filter design |
| Dimensions | 7.56 × 7.56 × 5.75 inches per filter |
| Compatibility | LEVOIT Core 300, Core 300-P, Core 300S, and Core 300S-P |
| Package quantity | 2 replacement filters |
| Included accessory | 1 cleaning brush |
| Replacement guidance | About every 6–8 months, depending on environment and usage |
| Best use | Rooms affected by odors, smoke, smog, or other airborne pollutants the carbon layer is designed to adsorb |
Key Takeaways
- This listing is for a Funmit third-party replacement, not an official LEVOIT-branded Core 300-RF-TX filter.
- The package includes two green toxin-absorber filters and one cleaning brush.
- Compatibility covers the LEVOIT Core 300, Core 300-P, Core 300S, and Core 300S-P according to the product listing.
- The three-stage design combines a preliminary layer, H13-grade HEPA media, and an activated-carbon filter.
- The seller describes the carbon layer as containing 60% more activated carbon than its standard design, making odor and smoke control the main reason to choose this version.
- Replacement is recommended about every 6–8 months, although heavy smoke, dust, or continuous use can shorten practical service life.
What Is the Funmit Core 300-RF-TX Toxin Absorber Filter?
The Funmit Core 300-RF-TX is a cylindrical replacement filter designed to fit several purifiers in LEVOIT’s Core 300 family. It is sold as a two-filter pack and is positioned as a compatible alternative to the toxin-absorber style Core 300-RF-TX filter.
Its main difference from a basic replacement filter is the carbon-focused third filtration stage. Funmit describes the filter as using a preliminary layer for larger debris, H13-grade HEPA media for finer airborne particles, and an activated-carbon layer designed to adsorb odors and gases.
This green version makes the most sense when your main concern includes cooking smells, smoke, smog, or other odor-producing pollutants. If your room mainly has ordinary dust and light odors, a basic replacement filter may be enough.
Before You Buy: Check the model label on your purifier before ordering. This Funmit filter is marketed for the Core 300, Core 300-P, Core 300S, and Core 300S-P, and it is a third-party compatible filter rather than an official LEVOIT replacement.
Who Should Buy It?
Best For
- You own a listed Core 300-series purifier and want a two-filter replacement pack.
- Your room deals with cooking odors, smoke, smog, or similar airborne smells.
- You prefer a value-focused third-party replacement instead of buying an official filter.
Skip If
- You only want filters manufactured or specifically recommended by LEVOIT.
- Your purifier model is not listed as compatible.
- You expect an air purifier alone to remove the source of persistent smoke, fumes, or indoor pollution.
How the 3-in-1 Filtration System Works
Preliminary Filtration
The outer preliminary layer is the first contact point for incoming air. Its job is to catch larger debris before it reaches the denser filtration media deeper inside the filter.
This matters because keeping larger particles away from the inner layers can help the filter maintain airflow longer. It does not make maintenance unnecessary, but it gives the finer filter media less large debris to handle.
H13-Grade HEPA Media
The middle stage is marketed as H13-grade HEPA filtration. This portion handles finer airborne particles that pass through the preliminary layer.
For you, that makes the filter useful for more than odor control. The filter combines particle filtration and carbon adsorption in one cylindrical replacement instead of requiring separate cartridges.
Activated Carbon for Odors and Gases
The final stage uses activated carbon. Funmit states that this design contains 60% more activated carbon than its standard filter configuration and promotes it for stronger household odors, smoke, and wildfire-related gases.
Carbon performance is one of the main reasons to choose the green toxin-absorber version over a basic white replacement. However, no disposable purifier filter should be treated as a substitute for removing pollution sources or ventilating a space when ventilation is safe and appropriate.
Key Features That Matter Most
Two Filters in One Package
The package contains two replacement filters rather than one. That gives you a spare for the next scheduled change and reduces the need to reorder immediately when the first filter reaches the end of its useful life.
Broad Core 300-Series Compatibility
The listing identifies compatibility with Core 300, Core 300-P, Core 300S, and Core 300S-P air purifiers. That is useful if you own more than one supported Core 300-series model or want a replacement that covers several revisions in the family.
Compatibility is still something you should verify from the label on your purifier. Similar model names do not guarantee that every filter sold for the Core family will fit every LEVOIT purifier.
Compact Cylindrical Size
Each filter is listed at approximately 7.56 × 7.56 × 5.75 inches. The cylindrical shape is designed to sit inside the purifier housing and work with the purifier’s surrounding air intake.
Cleaning Brush Included
The package also includes a small cleaning brush. You can use it for routine cleaning around the purifier or filter compartment, but the replacement filter itself is sold as a disposable component rather than a washable permanent filter.
Pro Tip: Write the installation month on a small removable label near the purifier. The seller suggests a 6–8 month replacement interval, so recording the date makes it easier to judge when the next change is approaching.
How It Performs in Real Use
For Everyday Cooking Odors
The extra activated-carbon focus is the most relevant feature when kitchen smells are your main complaint. The filter is designed to combine normal particle filtration with greater odor adsorption than Funmit’s standard replacement design.
Placement still matters. An air purifier will usually work better when its intake and outlet have clear airflow rather than being pushed tightly against furniture or hidden in a corner.
For Smoke and Pollution
The green toxin-absorber version is marketed specifically for environments affected by smoke, smog, and wildfire-related pollutants. Its carbon layer makes more sense for this use than a basic particle-focused replacement.
For severe smoke or potentially hazardous fumes, do not rely on the filter as your only protective measure. Follow local air-quality guidance, remove the pollution source when possible, and use appropriate ventilation or professional advice when needed.
For Pet and Household Odors
The filter can still handle ordinary household odors, but Funmit also sells a separate Pet Care version. If pet odors and dander are your main concern, compare the pet-focused option before choosing the green toxin-absorber version.
For Long-Term Use
Funmit recommends replacing the filter about every 6–8 months. That is a guideline rather than a guaranteed lifespan because actual service life depends on purifier runtime, dust levels, smoke exposure, pets, and indoor conditions.
A visibly loaded filter, reduced airflow, persistent odors, or a purifier replacement indicator can all be signs that you should inspect the filter rather than waiting only for a calendar date.
Installation and Maintenance
Replacing the filter does not require a complex setup. Unplug the purifier first, open the filter cover according to your purifier manual, remove the old filter, and place the new unwrapped replacement inside the housing.
After closing the purifier, follow the Core 300-series instructions for resetting the filter indicator if the light remains on. The purifier manual should remain your primary reference because control procedures can differ between models.
- Check monthly: Look for heavy dust buildup, restricted airflow, or unusual odor breakthrough.
- Keep the purifier area clear: Avoid blocking the air intake with curtains, furniture, or stored items.
- Do not wash the disposable filter: Replace it when its useful life is over instead of soaking or rinsing the filter media.
- Use the 6–8 month interval as a guide: Heavy smoke or dust can require earlier replacement.
- Reset the indicator after replacement: Follow the instructions for your exact purifier model.
Compatibility and Safety
This replacement filter is designed for specific LEVOIT Core 300-series air purifiers, so correct fit is the first safety and performance check. Do not force the filter into an unlisted purifier or modify it to fit another housing.
The filter is intended for household air purification. It can help capture particles and adsorb some odors and gases within the purifier’s normal operating limits, but it does not remove the original source of dangerous fumes or guarantee protection from hazardous indoor air.
If you are dealing with substantial wildfire smoke, combustion fumes, chemical exposure, or another serious air-quality problem, follow public-health guidance or professional advice in addition to using an air purifier.
How It Compares to Other Core 300 Filters
The official LEVOIT Core 300-RF is the standard three-stage option for dust, pollen, pet dander, and lighter household odors. LEVOIT’s official Core 300-RF-PA Pet Allergy Filter is aimed more directly at pet-related odors, while the official Core 300-RF-TX Toxin Absorber Filter is designed for stronger pollution, smoke, vehicle exhaust, VOCs, and similar gases.
The Funmit filter reviewed here targets the same general toxin-absorber use case as the Core 300-RF-TX but is a third-party compatible option. Choose Funmit if the two-pack format and value appeal to you. Choose the official LEVOIT replacement if manufacturer-branded filtration is your priority.
Pros and Cons
Pros
- Two replacement filters are included in one package.
- Three-stage design combines particle filtration and activated carbon.
- Seller states 60% more activated carbon than its standard replacement design.
- Fits several popular Core 300-series purifier models.
- Includes a cleaning brush for routine purifier maintenance.
Cons
- It is not an official LEVOIT-manufactured replacement filter.
- Compatibility is limited to the listed Core 300-series models.
- The 6–8 month service interval can vary substantially with smoke, dust, and purifier runtime.
Is It Worth the Price?
The Funmit Core 300-RF-TX is best viewed as a value-oriented third-party replacement. The two-filter package and included brush give you more replacement capacity than a single-filter purchase, while the activated-carbon-focused design targets buyers who need more than basic dust filtration.
It is worth considering if you already own a compatible Core 300-series purifier and want a spare filter ready for the next change. The biggest value question is not filtration design but brand preference. If you prefer to follow LEVOIT’s recommendation to use official replacement filters, the official Core 300-RF-TX is the more straightforward choice.
How It Compares to Alternatives
If ordinary dust and light household smells are your main concerns, the standard LEVOIT Core 300-RF may be sufficient. If pets are the main source of odor and airborne debris, the Core 300-RF-PA Pet Allergy Filter is worth comparing.
If smoke, smog, strong odors, or VOC-related filtration are your priority, the closest official alternative is LEVOIT’s Core 300-RF-TX Toxin Absorber Filter. The Funmit version makes the most sense when you specifically want a compatible two-pack from a third-party brand.
Frequently Asked Questions
Is this an official LEVOIT Core 300-RF-TX filter?
No. The linked product is made by Funmit and marketed as a compatible replacement for the Core 300-RF-TX style filter. LEVOIT also sells its own official Core 300-RF-TX Toxin Absorber Filter.
Which LEVOIT air purifiers does it fit?
The product listing identifies compatibility with the LEVOIT Core 300, Core 300-P, Core 300S, and Core 300S-P. Check the model label on your purifier before ordering because it should not be assumed to fit other LEVOIT models.
How many filters are included?
The linked green toxin-absorber package is listed as a two-pack. It also includes one cleaning brush for routine maintenance around the purifier.
How often should the Funmit Core 300 filter be replaced?
Funmit recommends replacement about every 6–8 months. Actual life can be shorter or longer depending on purifier runtime, dust levels, pets, smoke exposure, and other indoor conditions.
Can I wash and reuse the filter?
No. This is a disposable replacement filter rather than a washable permanent filter. Replace the filter when it becomes loaded or reaches the end of its useful service period.
Is the toxin-absorber version better for smoke and odors?
That is the main purpose of this version. Funmit promotes the green filter with an enhanced activated-carbon stage for odors, smog, and smoke-related pollutants, while its standard filter focuses more broadly on everyday filtration.
Who should skip this replacement filter?
Skip it if your purifier is not one of the listed compatible models or if you only want manufacturer-branded replacement filters. You should also avoid relying on an air purifier alone for dangerous smoke, chemical fumes, or other serious indoor-air hazards.
The Bottom Line
The Funmit Core 300-RF-TX Toxin Absorber Replacement Filter is a practical option if you own a compatible Core 300-series purifier and want two third-party filters with an activated-carbon focus for odors and smoke. Its strongest points are the 3-in-1 design, two-pack format, and broad Core 300 compatibility, while its main limitation is that it is not an official LEVOIT replacement. Choose it if those tradeoffs suit your priorities, but choose LEVOIT’s official Core 300-RF-TX if manufacturer-branded filtration matters more to you.
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