Disclosure: As an Amazon Associate, we earn from qualifying purchases. If you click a link on this page and make a purchase, we may receive a small commission at no extra cost to you.
Replacing an AP300 air purifier filter should be simple, but choosing the correct replacement matters because fit and filtration design can vary between products. The Asheviller AP300 Filter Replacement is a third-party, two-filter pack made for the Instant AP300 Air Purifier and designed as an alternative to the F300 filter. It combines H13 True HEPA filtration, activated carbon, and an antimicrobial coating in a 3-in-1 design. It is a practical choice if you specifically own an AP300, but you should know that this is a compatible aftermarket filter rather than the official Instant-branded F300 replacement.
Quick Verdict
Rating: 8/10
Best For: Instant AP300 owners who want a two-pack of compatible H13 HEPA replacement filters.
Bottom Line: The Asheviller AP300 replacement offers the filtration layers and AP300-specific fit most buyers need, while the two-pack gives you a spare for the next change. Its main tradeoff is that it is a third-party compatible product rather than the official Instant F300 filter.
| Specification | Detail |
|---|---|
| Brand | Asheviller |
| Model | AP300 Filter Replacement |
| Product Type | Replacement air purifier filter |
| Compatibility | Instant AP300 Air Purifier |
| Comparable Filter | F300 |
| Filtration | 3-in-1 filtration system |
| Particle Filter | H13 True HEPA |
| Odor Layer | Activated carbon |
| Additional Treatment | Antimicrobial coating |
| Claimed Particle Capture | 99.97% of particles down to 0.3 microns |
| Dimensions | 7 x 7 x 5.7 inches |
| Listed Item Weight | 0.95 lb |
| Package Quantity | 2 replacement filters |
| Replacement Guidance | About every 8 months according to the product recommendation, with actual life depending on use and air conditions |
What Is the Asheviller AP300 Filter Replacement?
The Asheviller AP300 Filter Replacement is an aftermarket filter made specifically for the Instant AP300 Air Purifier. It is sold as a two-pack and is designed to serve the same basic replacement role as an F300 filter.
Each filter uses three filtration elements: H13 True HEPA media for fine airborne particles, an activated carbon layer to help reduce odors, and an antimicrobial coating intended to protect the filter from microbial growth. This combination makes it suitable for routine filtration in homes where dust, pollen, pet dander, smoke particles, or household odors are common concerns.
The key buying consideration is compatibility. This product is intended for the AP300, so you should confirm the model number on your purifier before ordering rather than choosing by appearance alone.
Who Should Buy It?
Best For
- You own an Instant AP300 Air Purifier and need a compatible replacement filter.
- You prefer a two-pack so you can keep a spare filter available.
- You want HEPA particle filtration plus an activated carbon layer for household odors.
Skip If
- You own an AP100, AP200, or another purifier model that requires a different filter size.
- You specifically want an official Instant-branded OEM F300 filter.
- You only need one replacement and do not want to store a second filter.
Before You Buy: Check the label or model information on your purifier before ordering. This filter is designed for the Instant AP300 and should not be assumed to fit AP100, AP200, or unrelated air purifier models. It is also an aftermarket compatible product, not the official Instant F300 filter.
How the 3-in-1 Filtration System Works
H13 True HEPA Filtration
The main particle-filtering layer is an H13 True HEPA filter. The product information states that it captures 99.97% of particles as small as 0.3 microns. In everyday use, that makes the filter relevant for common airborne particles such as dust, pollen, pet dander, and fine smoke particles that reach the purifier.
HEPA filtration does not mean that a purifier removes every contaminant from a room, and performance still depends on factors such as purifier placement, fan setting, room conditions, and how often you run the unit. The replacement filter simply allows the AP300’s filtration system to continue doing its job when the old filter has reached the end of its useful life.
Activated Carbon for Odor Control
The second part of the system is the activated carbon layer. Its job is different from the HEPA media. Instead of primarily trapping particles, carbon helps reduce odors that pass through the purifier.
This can be useful in homes with cooking smells, pets, smoke odors, or other everyday sources of unwanted smells. Carbon capacity is finite, however, so an older filter can become less effective at odor control even when it does not look heavily dirty.
Antimicrobial Coating
The filter also includes an antimicrobial coating. This treatment is intended to inhibit microbial growth on the filter material and help protect the filter from degradation.
You should not treat this feature as a substitute for cleaning your home, controlling moisture, or following normal hygiene practices. It is a feature of the filter material itself rather than a guarantee that your room is free from bacteria, mold, or other microorganisms.
Fit and Compatibility
The Asheviller replacement is designed specifically around the Instant AP300 form factor. The listed dimensions are 7 inches long, 7 inches wide, and 5.7 inches thick.
Correct fit matters because an improperly sized filter can leave gaps or interfere with the purifier’s normal airflow. You should not trim, compress, or modify a replacement filter to make it fit another purifier.
The listing also describes the filter as comparable to the F300. That helps AP300 owners identify the intended filter type, but the Asheviller product should still be viewed as a compatible third-party alternative rather than an OEM Instant filter.
Installation and Setup
Replacing the filter does not require complicated tools. Start by switching off and unplugging the AP300. Turn the purifier on its side, remove the bottom or removable base, take out the used filter, and place the new filter into the unit in the correct orientation.
After the new filter is seated properly, reinstall and secure the base before returning the purifier to its normal upright position. Plug the purifier back in and restart it.
The AP300 uses a filter-change indicator. After replacing the filter, follow the purifier’s instructions for resetting that indicator. On AP300 documentation, the filter control is reset by holding the filter button for about three seconds after replacement.
Pro Tip: Write the installation month on a small removable note or set a calendar reminder when you install a new filter. The product recommends replacement around every eight months, but your actual interval can be shorter when the purifier runs heavily or handles a dusty environment.
Replacement Life and Maintenance
The Asheviller listing recommends replacing the filter about every eight months for optimal performance. Treat that as a guideline rather than a fixed expiration date. Filter life varies with purifier runtime, indoor particle levels, smoke exposure, pet dander, and other environmental conditions.
The AP300 itself has a replacement indicator to help you know when a filter change is due. If the indicator activates earlier than expected, it makes more sense to follow the purifier’s usage-based reminder than to wait for a calendar date.
This style of filter is intended to be replaced rather than washed and reused. Washing HEPA or carbon filter media can damage the material and change how air moves through it. When the filter reaches the end of its service life, replace it with a dry, correctly sized replacement.
How It Performs in Real Use
For Everyday Dust and Pollen
The H13 HEPA layer is the most relevant feature when your main concern is airborne dust, pollen, or pet dander. When installed correctly in an AP300, the filter gives the purifier a fresh filtration surface instead of forcing air through a loaded old filter.
You will still get the best results by using the purifier in an appropriately sized area and giving its air intake and exhaust enough open space for circulation.
For Homes With Pets
Pet households can put both filtration layers to work. The HEPA material addresses airborne dander and fine particles, while the carbon layer can help with some odors that pass through the purifier.
You may also find that filter life is shorter in a home with heavy shedding or several pets. Checking the purifier’s filter indicator is more useful than assuming every filter will last the full recommended interval.
For Cooking and Household Odors
The activated carbon layer gives this replacement an advantage over a particle-only filter when household odors are part of your concern. It can help reduce odors carried through the purifier, though it cannot remove the source of an odor.
Ventilation, cleaning, and correcting the source of smoke or persistent smells are still important. An air purifier filter should support those steps rather than replace them.
For Long-Term AP300 Ownership
The two-pack format is convenient if you expect to keep using your AP300. You can install one filter and store the second in a clean, dry location until the next replacement cycle.
This avoids needing to shop for another filter immediately when your next replacement reminder appears. The tradeoff is that you are buying two at once, which may be unnecessary if you are unsure how long you will keep the purifier.
Common Mistakes to Avoid
- Ordering by appearance alone: Confirm that your purifier is the Instant AP300 before buying.
- Leaving packaging on the filter: Remove all shipping material before installation.
- Installing the filter loosely: Make sure it sits correctly before closing the purifier base.
- Forgetting the filter indicator: Reset the filter reminder after installing the new filter according to the AP300 instructions.
- Washing the replacement filter: Replace this type of filter rather than trying to clean the HEPA and carbon media with water.
- Blocking airflow: Keep the purifier’s air intake and exhaust areas clear when returning it to service.
Compatibility and Safety
Always unplug the AP300 before opening the base or removing its filter. Install only a filter that fits the purifier correctly, and follow the AP300 operating instructions during replacement and restart.
An air purifier is not a carbon monoxide or radon safety device and should not be treated as one. Keep working smoke alarms and carbon monoxide alarms where required, and address hazardous fumes or combustion problems at their source.
If the purifier has an electrical problem, damaged cord, unusual burning smell, or other fault, replacing the filter is not a repair. Stop using the appliance and follow the manufacturer’s service guidance instead.
Pros and Cons
Pros
- Designed specifically for compatibility with the Instant AP300.
- H13 True HEPA media targets fine airborne particles.
- Activated carbon layer adds odor-reduction capability.
- Antimicrobial coating helps protect the filter material from microbial growth.
- Two filters are included, giving you a spare for a future replacement.
Cons
- It is an aftermarket replacement rather than the official Instant F300 filter.
- Compatibility is limited to the AP300 rather than the full Instant purifier range.
- The eight-month replacement interval is only a guideline and can vary with air conditions and usage.
Is It Worth the Price?
The Asheviller AP300 replacement makes the most sense when you value the convenience of getting two compatible filters in one purchase. You receive a replacement for the current filter and a second unit that can be stored for the next maintenance cycle.
The 3-in-1 filtration design also covers the main features AP300 owners are likely to expect from this filter type: H13 HEPA particle capture, activated carbon for odors, and an antimicrobial treatment on the filter.
The value calculation changes if OEM parts are your priority. Because this is a third-party compatible filter, buyers who want an official Instant-branded component should compare it with the genuine Instant F300 before deciding.
How It Compares to Alternatives
The most direct alternative is the official Instant F300 replacement filter. Instant’s own F300 also uses HEPA-13 filtration, a carbon layer, and an antimicrobial coating and is designed specifically for the AP300. The main difference is that the Asheviller product is an aftermarket compatible option sold as a two-pack.
Other third-party AP300-compatible filters are also available, including products that pair H13-style filter media with activated carbon. When comparing them, focus on confirmed AP300 fit, the number of filters included, filtration construction, and seller support rather than choosing only by the lowest advertised price.
Frequently Asked Questions
Is the Asheviller AP300 filter an official Instant replacement?
No. It is an aftermarket replacement made by Asheviller and designed to be compatible with the Instant AP300. If you specifically want an OEM filter, compare it with the official Instant F300.
Which air purifier does this filter fit?
It is designed for the Instant AP300 Air Purifier and is described as comparable to the F300 filter. Do not assume it fits AP100, AP200, or unrelated purifier models.
How many replacement filters are included?
The package contains two F300-style AP300 replacement filters. You can install one and store the second in a clean, dry location for your next filter change.
How often should you replace the AP300 filter?
The Asheviller product recommendation is about every eight months. Actual filter life can vary with purifier runtime and indoor air conditions, so also pay attention to the AP300’s filter replacement indicator.
Can you wash and reuse this AP300 filter?
You should treat it as a replaceable filter rather than a washable one. Washing HEPA and activated-carbon media can damage the filter structure and affect airflow or filtration performance.
What does the activated carbon layer do?
The activated carbon layer helps reduce odors that pass through the purifier. It complements the HEPA media, which is focused primarily on capturing airborne particles.
Do you need to reset the AP300 after changing the filter?
Yes, when the filter reminder has been triggered. After installing the replacement, the AP300 instructions call for holding the filter control for about three seconds to reset the indicator.
Who should skip this replacement filter?
Skip it if your purifier is not an Instant AP300 or if you only want genuine Instant-branded replacement parts. It may also be unnecessary if you only need one filter and do not want a two-pack.
The Bottom Line
The Asheviller AP300 Filter Replacement is worth considering if you own an Instant AP300 and want a two-pack with H13 True HEPA filtration, activated carbon, and an antimicrobial coating. Its biggest strength is the combination of AP300-specific compatibility and a spare second filter, while its main limitation is that it is a third-party alternative rather than the official Instant F300.
If confirmed AP300 fit and the two-pack format suit your needs, the overall package earns our 8/10 recommendation. If you prefer OEM components, compare the official F300 before purchasing.
