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The best budget air purifier filter keeps air cleaner for a small price, from small-room HEPA sets to carbon sheets and HVAC multipacks.
We compared 5 cheap filters by type and how long they last.
Quick Answer: The Best Budget Air Purifier Filter
- Best Budget Small Room: BLUEAIR Genuine 411 Series Air Purifier Replacement Filter, Everyday
- Best Budget Odor: Bagean Cut to Fit Activated Carbon Filter Sheet 16 x 48 in
- Best Budget Furnace: Filtrete 20x20x1 Air Filter, MERV 13, MPR 1900, 2 HVAC Filters
- Best Budget Tower: Germ Guardian FLT5000 True HEPA Genuine Air Purifier Replacement Filter C
- Best Budget Pre-Filters: Durabasics Pre-Filters for Honeywell HPA300, 4-Pack (Compatible)
The Blueair Genuine 411 Series Filter is our best budget air purifier filter for small rooms. The Bagean Cut-to-Fit Carbon Filter Sheet is the budget odor pick, and the Filtrete 20x20x1 MERV 13 (MPR 1900) is a budget furnace upgrade.
Best Budget Air Purifier Filter Comparison Table
| Product | Best For | Type | Key Feature | Buy |
|---|---|---|---|---|
| BLUEAIR Genuine 411 Series Air Purifier Replacement Filter, Everyday | Best Budget Small Room | Particle + carbon filter | Particle + activated carbon, small-room size | Check Price |
| Bagean Cut to Fit Activated Carbon Filter Sheet 16 x 48 in | Best Budget Odor | Cut-to-fit carbon sheet | 16 x 48 in coconut-shell carbon | Check Price |
| Filtrete 20x20x1 Air Filter, MERV 13, MPR 1900, 2 HVAC Filters | Best Budget Furnace | 1-inch MERV 13 HVAC filter | MERV 13, about 3-month life | Check Price |
| Germ Guardian FLT5000 True HEPA Genuine Air Purifier Replacement Filter C | Best Budget Tower | HEPA + charcoal + pre-filter | True HEPA, charcoal layer, pre-filter in one | Check Price |
| Durabasics Pre-Filters for Honeywell HPA300, 4-Pack (Compatible) | Best Budget Pre-Filters | Compatible carbon pre-filters | Activated carbon, precision cut | Check Price |
The 5 Best Budget Air Purifier Filters
Each pick below was compared on filter type, room fit, carbon content, change interval and value.
BLUEAIR Genuine 411 Series Air Purifier Replacement Filter, Everyday
1Blueair’s genuine 411 filter fits the Blue Pure 411, 411+ and 411 Auto.
👍 Pros & Cons
Pros
- Genuine Blueair fit
- Particle plus carbon layers
- Small and easy to swap
Cons
- Small-room purifier only
📄 Detailed Review
- Type: Particle + carbon filter
- Includes: Filter
- Key feature: Particle + activated carbon, small-room size
It combines particle filtration with activated carbon for dust, allergens and light odors.
It is our small-room filter pick.
Bagean Cut to Fit Activated Carbon Filter Sheet 16 x 48 in
2Bagean’s 16 x 48 inch sheet uses coconut-shell activated carbon you trim to size.
👍 Pros & Cons
Pros
- Cut to any shape
- Coconut-shell carbon
- Use old pre-filter as template
Cons
- Not a HEPA filter
📄 Detailed Review
- Type: Cut-to-fit carbon sheet
- Includes: 1 sheet
- Key feature: 16 x 48 in coconut-shell carbon
Use the old pre-filter as a template, then fit it where the purifier maker allows.
It is our cut-to-fit pre-filter pick.
Filtrete 20x20x1 Air Filter, MERV 13, MPR 1900, 2 HVAC Filters
3Filtrete’s MPR 1900 filter is a 1-inch MERV 13 pleated filter in the common 20x20x1 size.
👍 Pros & Cons
Pros
- MERV 13 rating
- Common 20x20x1 size
- About 3 months per filter
Cons
- Check your system can handle MERV 13
📄 Detailed Review
- Type: 1-inch MERV 13 HVAC filter
- Includes: 2 filters
- Key feature: MERV 13, about 3-month life
Filtrete rates it for about 3 months and markets it for allergens and fine particles.
It is our pick for upgrading a furnace filter.
Germ Guardian FLT5000 True HEPA Genuine Air Purifier Replacement Filter C
4GermGuardian’s genuine Filter C combines a True HEPA layer, an activated charcoal layer and a pre-filter.
👍 Pros & Cons
Pros
- Three layers in one filter
- Fits AC5000 and AC5350 families
- Genuine GermGuardian part
Cons
- Thin charcoal layer
📄 Detailed Review
- Type: HEPA + charcoal + pre-filter
- Includes: Filter
- Key feature: True HEPA, charcoal layer, pre-filter in one
It fits the AC5000, AC5250PT and AC5350 family, among other listed models.
It is a simple all-in-one filter for tower purifiers.
Check GermGuardian FLT5000 Filter C (Genuine) Price on Amazon
Durabasics Pre-Filters for Honeywell HPA300, 4-Pack (Compatible)
5Durabasics pre-filters are precision-cut carbon sheets for the Honeywell HPA300.
👍 Pros & Cons
Pros
- Precision cut
- Activated carbon
- Low cost
Cons
- Not genuine Honeywell
📄 Detailed Review
- Type: Compatible carbon pre-filters
- Fits: Honeywell HPA300 series
- Key feature: Activated carbon, precision cut
They let you swap pre-filters more often at lower cost.
Swap them about every 3 months.
How We Chose the Best Budget Air Purifier Filter
To choose the best budget air purifier filter, we compared popular HEPA, carbon, pre-filter and MERV 13 HVAC filters on Amazon by filter type, rated life, fit and owner feedback.
EPA says to match CADR to room size, use activated carbon for gases and choose at least MERV 13 for HVAC filters where the system allows; see the EPA Guide to Air Cleaners in the Home.
Product details in this guide are based on manufacturer specifications and verified owner feedback. Read more on our How We Test page.
Buying Guide: Cheap but Effective
Keep these points in mind before you buy.
HEPA, carbon or pre-filter
HEPA layers catch fine particles, activated carbon targets gases and odors, and pre-filters catch hair and lint so the main filter lasts longer. EPA notes most filters target either particles or gases, so many purifiers use two.
Do not skip the seal
A cheap filter that leaves gaps lets air bypass it; check dimensions closely.
Change it on time
EPA notes all filters need regular replacement, and a dirty, overloaded filter will not work well. Follow the maker’s interval and the purifier’s indicator.
Budget Tips
Make filters last:
- Vacuum pre-filters.
- Keep doors closed.
- Run lower speeds longer.
- Fix odor sources.
Quick answers about the best budget air purifier filter.
Frequently Asked Questions
What is the best budget air purifier filter?
The best budget air purifier filter is the Blueair 411 filter for small rooms, with Bagean carbon sheets and Filtrete MERV 13 as cheap add-ons.
What is the cheapest upgrade?
A MERV 13 furnace filter, if your system allows.
Do cheap filters fit?
Check dimensions and part numbers.
Is a carbon sheet enough?
It helps odors only.
Do prices change?
Often; check before buying.
Final Verdict
Our final pick for the best budget air purifier filter is the Blueair Genuine 411 Series Filter. Choose the Bagean Cut-to-Fit Carbon Filter Sheet if you want the budget odor pick, or the Filtrete 20x20x1 MERV 13 (MPR 1900) as a budget furnace upgrade.
Related Guides
More air filter guides:
- Best Air Purifier Filter
- Best Budget Air Purifier Replacement Filter
- Best Air Purifier Filter Replacement Filter
- Best Alternative to Air Purifier Filter
- Best Air Purifier for Allergies
Product details are based on manufacturer specifications at the time of writing. Prices and availability change often, so check Amazon for the latest price.
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