8 Best Honeywell HPA300 Replacement Filters (October 2026)

The best Honeywell HPA300 HEPA and carbon filter replacements include the Funmit HPA300 Filter Replacement for Honeywell HPA300 for a balanced replacement set, the Honeywell HEPA Air Purifier Filter R for genuine Honeywell filters, and the Smilyan HPA300 HEPA Filter Replacement for Honeywell for a larger combo pack.

On this page (3 sections)

1. Which Honeywell HPA300 replacement filters stand out?
2. How do you choose a Honeywell HPA300 HEPA filter replacement?
3. Which Honeywell HPA300 replacement filter should you choose?

The best Honeywell HPA300 replacement filters depend on whether you want genuine Honeywell Filter R or a compatible set with carbon pre-filters included. Funmit’s 3-filter combo is the leading all-in-one choice here, while Honeywell’s own 3-pack suits buyers who prefer a brand-made main filter.

An HPA300 uses a main R filter and a separate carbon pre-filter. You can buy them together or replace only the part that is due.

Our picks at a glance

1. 1
   Best for a balanced replacement set

   Funmit HPA300 Filter Replacement for Honeywell HPA300

   9.7/10 our score

   See it on Amazon
2. 2
   Best for genuine Honeywell filters

   Honeywell HEPA Air Purifier Filter R

   9.6/10 our score

   See it on Amazon
3. 3
   Best for a larger combo pack

   Smilyan HPA300 HEPA Filter Replacement for Honeywell

   9.4/10 our score

   See it on Amazon

4. 4

   Breathe Naturally

   Best for carbon pre-filters only
   Check it
5. 5

   XBGG 6 Pack HPA300 HEPA Filter Replacement

   Best for six R filters with carbon pads
   Check it
6. 6

   Funmit Air Purifier Filter R Replacement

   Best for R filters without carbon pads
   Check it
7. 7

   Durabasics 6 Air Filter Set for HPA300

   Best for a 6-filter all-in-one set
   Check it
8. 8

   Laukowind HPA304 Filters Replacement for Honeywell Home

   Best for a compact combo pack
   Check it

Which Honeywell HPA300 replacement filters stand out?

Funmit’s combo offers a practical mix of R filters and precut carbon pre-filters, while Honeywell’s pack is the straightforward genuine-filter choice. The other sets offer more filters per pack or focus on carbon pre-filters alone.

We compared model compatibility, included filter types, pack size and the replacement guidance each brand provides. Our score weighs specs, features and buyer feedback against what you're shopping for.

1

Funmit HPA300 Filter Replacement for Honeywell HPA300: Best for a balanced replacement set

9.7/10Our score

• 3 R replacement filters
• 4 precut carbon pre-filters
• Compatible with HPA300 and HPA304

A useful mix of R filters and carbon pre-filters for buyers who want both filter types in one set. Funmit recommends replacing the R filter every 6–12 months and the pre-filter every 2–3 months, depending on use and environment.

See it on Amazon

Pros

• Includes both filter types
• Pre-filters are precut
• Lists HPA300 and HPA304 compatibility

Cons

• Replacement timing depends on use and environment

Funmit’s set is the best fit for buyers who want both filter types in one purchase. It includes 3 R replacement filters and 4 precut carbon pre-filters, and lists HPA300 and HPA304 among its compatible models.

The R filter measures 10.2 x 6.5 x 1.6 inches. Funmit recommends changing it every 6–12 months and the carbon pre-filter every 2–3 months, depending on use and environment.

The two filter types have different schedules, so mark each replacement date separately. That makes it easier to replace the carbon layer without discarding a main filter that is still within its service period.

2

Honeywell HEPA Air Purifier Filter R: Best for genuine Honeywell filters

9.6/10Our score

• 3 genuine Filter R replacements
• Compatible with HPA300
• Pre-filters sold separately

Honeywell’s own Filter R pack suits buyers who prefer a genuine replacement. Honeywell says the filters help capture 99.97% of specified particles from the air that passes through them.

See it on Amazon

Pros

• Genuine Honeywell filters
• Honeywell gives annual replacement guidance
• Pre-filter needs are easy to plan separately

Cons

• Does not include carbon pre-filters

Honeywell’s own Filter R is the pick for buyers who prefer a genuine replacement from the purifier brand. This pack includes 3 filters, and Honeywell lists the HPA300 among the compatible models.

Honeywell says its filters help capture 99.97% of specified airborne particles from the air that passes through them. It recommends replacing Filter R once a year, while carbon pre-filters are sold separately.

Choose this set if you want the maker’s main filter and are comfortable buying Filter A separately. For a broader guide to compatible choices, see our best Honeywell HEPA filter replacement options.

3

Smilyan HPA300 HEPA Filter Replacement for Honeywell: Best for a larger combo pack

9.4/10Our score

• 6 HEPA R replacements
• 8 activated carbon pre-filters
• Compatible with HPA300 and HPA304

This larger combo pack gives you 6 R filters and 8 carbon pre-filters. Smilyan recommends replacing the R filter every 6–12 months and the carbon pre-filter every 2–3 months.

See it on Amazon

Pros

• Large supply of both filter types
• Pre-filters are sized for the HPA300 series
• Lists several compatible Honeywell models

Cons

• More filters to store between replacements

Smilyan’s pack makes sense when you want a larger stock of both filter types. It contains 6 R filters and 8 activated carbon pre-filters, and lists HPA300, HPA304 and HPA3300 among compatible models.

Smilyan recommends changing the R filter every 6–12 months and the carbon pre-filter every 2–3 months. The different schedules mean the 8 carbon pieces may be used up before all 6 R filters.

This is a bulk option, so make sure you have a dry place to store replacements until needed. Check the model list on the package before ordering if you own a less common HPA series.

4

Breathe Naturally: Best for carbon pre-filters only

9.3/10Our score

• 4 activated carbon pre-filters
• Compatible with HPA300
• Pre-filters help reduce odors

Breathe Naturally sells a carbon pre-filter pack for HPA300 owners who need that layer but not a new R filter. The brand recommends replacing the pre-filter every 2–3 months with regular use.

See it on Amazon

Pros

• Carbon pre-filters sold on their own
• Pack includes 4 filters
• Designed for HPA300 compatibility

Cons

• Does not include R filters

Breathe Naturally is the choice for HPA300 owners who need only the carbon layer. The pack includes 4 activated carbon pre-filters, and the brand recommends replacement every 2–3 months with regular use.

Keeping the carbon layer fresh can help with odor reduction, while the R filter handles the main filtration role. This set does not include R filters, so it won’t cover both replacement needs by itself.

Pick it when your main filter has time left and you want to restock pre-filters separately. If you’re comparing broader Honeywell options, our guide to Honeywell air purifier filter replacements covers other models and filter types.

5

XBGG 6 Pack HPA300 HEPA Filter Replacement: Best for six R filters with carbon pads

9.2/10Our score

• 6 HEPA R replacements
• 8 carbon pre-filters
• Compatible with HPA300 and HPA304

XBGG combines 6 R filters with 8 precut carbon pre-filters. The brand recommends replacing the HEPA filter every 6–12 months and the pre-filter every 2–3 months.

See it on Amazon

Pros

• Includes both filter types
• Pack of 6 R filters
• Pre-filters are precut

Cons

• Check your exact purifier model before ordering

XBGG combines 6 HEPA R filters and 8 carbon pre-filters for HPA300 owners who want a substantial supply in one set. It lists HPA300 and HPA304 compatibility, along with several other Honeywell models.

The brand recommends replacing its HEPA filter every 6–12 months and the carbon pre-filter every 2–3 months. Its schedule is similar to other compatible combo sets, so the main choice is pack size and whether you want both types together.

The precut pads avoid measuring and trimming for the HPA300. Confirm that your exact purifier appears in the model list before buying, especially if you have a related model rather than the HPA300.

6

Funmit Air Purifier Filter R Replacement: Best for R filters without carbon pads

9.1/10Our score

• 6 R replacement filters
• No carbon pre-filters included
• Compatible with HPA300 and other models

This Funmit pack focuses on 6 R filters for buyers who already have carbon pre-filters. Funmit recommends replacing the R filter every 6–8 months, depending on use and environment.

See it on Amazon

Pros

• Six R filters in one pack
• Designed to replace HRF-R3, HRF-R2 and HRF-R1
• Fits HPA300 and other listed models

Cons

• Carbon pre-filters must be bought separately

This Funmit pack is designed for buyers who want 6 R filters without carbon pre-filters. It lists compatibility with the HPA300 and several other Honeywell purifier models.

Funmit recommends replacing the R filter every 6–8 months, depending on usage and environment. Since no carbon pads are included, plan to keep a separate supply if odor control from that layer is part of your routine.

Choose it when your carbon pre-filters are stocked or you replace them through another source. The HPA100 uses the same R filter family, and our guide to Honeywell HPA100 replacement filters compares options for that model.

7

Durabasics 6 Air Filter Set for HPA300: Best for a 6-filter all-in-one set

8.7/10Our score

• 6 R replacements
• 8 activated carbon pre-filters
• Compatible with HPA300 and HPA304

Durabasics includes 6 R filters and 8 carbon pre-filters for buyers who want a larger supply of both. Its stated R filter dimensions are 10.2 x 6.5 x 1.6 inches.

See it on Amazon

Pros

• Includes both filter types
• Lists several compatible models
• Pre-filters are sized for the HPA300

Cons

• Confirm model compatibility before ordering

Durabasics provides 6 R filters and 8 activated carbon pre-filters for HPA300 owners who want a larger set. Its stated R filter size is 10.2 x 6.5 x 1.6 inches, and the brand lists HPA300 and HPA304 compatibility.

The pack includes both filter types, so it can cover the main filter and the pre-filter in one purchase. Durabasics describes the set as HEPA 13 and says it generally lasts about a year, though replacement timing depends on the air and use.

Compare the model names before ordering, since compatible sets can span several related purifiers. For a quick explanation of how the main filter captures particles, read how a HEPA filter works inside a purifier.

8

Laukowind HPA304 Filters Replacement for Honeywell Home: Best for a compact combo pack

8.5/10Our score

• 3 R replacement filters
• 6 activated carbon pre-filters
• Compatible with HPA300 and HPA304

Laukowind’s set pairs 3 R filters with 6 carbon pre-filters. The brand recommends changing them on different schedules, with more frequent carbon pre-filter replacement.

See it on Amazon

Pros

• Includes both filter types
• Pre-filters are precut for HPA300 machines
• Lists HPA300 and HPA304 compatibility

Cons

• Check the exact model against the compatibility list

Laukowind’s set offers 3 R filters and 6 carbon pre-filters, which suits buyers who want a combo pack without the largest quantity here. The brand lists HPA300 and HPA304 as compatible models.

Laukowind recommends replacing the R filter every 6–12 months and the carbon pre-filter every 2–3 months. It also says the pre-filters come precut for HPA300 machines, while they can be cut for other models.

Check the filter code and purifier model before ordering, especially if you own a different HPA series. Our guide to what makes a filter a HEPA filter explains the standard behind the term.

How do you choose a Honeywell HPA300 HEPA filter replacement?

Start with the filter code, then decide whether you want a genuine R filter or a compatible set. The HPA300 uses Filter R as its main filter, while the carbon pre-filter is a separate part.

Does your HPA300 replacement set include carbon pre-filters?

Check the pack contents before ordering. Some sets include both R filters and carbon pre-filters, while Funmit’s six-pack and Honeywell’s genuine R pack focus on the main filter only.

If you already have carbon pads, a main-filter-only pack can suit your needs. If both layers are due, a combo set saves you from sourcing them separately.

How many Honeywell HPA300 filters do you need?

Pack size matters because the R filter and pre-filter have different replacement intervals. A set with several of each can last through multiple service cycles, but the carbon pre-filters may run out sooner.

For lighter use or limited storage, a smaller combo set may be easier to manage. For a household that keeps spares on hand, compare the included quantities with the schedule you follow.

How can you check fit before ordering?

Match the model number on your purifier with the compatible models named for the filter. Many sets list HPA300 and HPA304, but compatibility lists vary across brands.

Also compare the filter code: R filters may be identified as HRF-R3, HRF-R2 or HRF-R1, while the carbon pre-filter is often called A, HRF-A300 or HRF-AP1. Use your purifier manual if the model label or filter code is unclear.

Which Honeywell HPA300 replacement filter should you choose?

Choose Funmit’s 3-filter combo if you want a balanced supply of R filters and carbon pre-filters, or Honeywell’s pack if you prefer genuine Filter R and will buy pre-filters separately. For carbon pads alone, Breathe Naturally is the focused option.

Before you order, match your purifier model and decide whether you need both filter layers. For a wider model comparison, see our guide to the best Honeywell air purifier filter replacement.

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Sources

• Honeywell Filter R product information
• U.S. Environmental Protection Agency: What is a HEPA filter?
• ENERGY STAR: Guide to air cleaners

Our top 3 picks at a glance

1. 1
   Best for a balanced replacement set

   Funmit HPA300 Filter Replacement for Honeywell HPA300

   9.7/10 our score

   See it on Amazon
2. 2
   Best for genuine Honeywell filters

   Honeywell HEPA Air Purifier Filter R

   9.6/10 our score

   See it on Amazon
3. 3
   Best for a larger combo pack

   Smilyan HPA300 HEPA Filter Replacement for Honeywell

   9.4/10 our score

   See it on Amazon

Frequently asked questions

Which replacement filter does the Honeywell HPA300 use?

The Honeywell HPA300 uses Filter R for its main filter and Filter A, also called HRF-A300 or HRF-AP1, as a carbon pre-filter. Check the model and filter codes before ordering because some compatible sets cover several Honeywell purifier models.

A complete replacement set includes both the R filter and carbon pre-filters.

How often should you replace HPA300 filters?

Honeywell recommends replacing its Filter R once a year. Compatible brands give ranges that vary: several recommend changing the R filter every 6–12 months and the carbon pre-filter every 2–3 months.

Use the purifier instructions and consider how often it runs and the air in your home.

Can you replace only the carbon pre-filter?

Yes. If your R filter is still due for service later, you can replace only the carbon pre-filter.

Breathe Naturally sells a pack of 4 carbon pre-filters compatible with the HPA300.

Check that the replacement is the right type and shape for your purifier.

Are compatible HPA300 filters the same as genuine Honeywell filters?

No. Compatible filters are made by other brands, while genuine Filter R replacements come from Honeywell.

Honeywell says compatible replacements are not guaranteed to offer the same performance or efficiency as its own filters.

Compare fit, included pre-filters and replacement guidance before choosing.