Best Furnace Filters Under $50 (2026)
We ranked filters by a value score that weights MERV/MPR filtration level, available sizes and pack counts, pleated construction, and current retail price under $50
The Verdict
- Best Overall: Filterbuy 17.5x23.5x1 Air Filter, MERV 8, 4-Pack — for standard sizes: reliable MERV 8 pleated filtration in a 4-pack for routine replacement
- Best Value: Filtrete 18x18x1 Air Filter, MPR 300, MERV 5 — Best basic filtration: MPR 300/MERV 5 pleated option suited for low-resistance, everyday dust control
Top Picks
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1
Best Overall Filterbuy 17.5x23.5x1 Air Filter, MERV 8, 4-Pack
for standard sizes: reliable MERV 8 pleated filtration in a 4-pack for routine replacement
MERV 8 pleated air filters for furnace, AC, or heat pump. Improves HVAC efficiency and air quality. Customers find them well-made, easy to install, and effective at keeping air clean
- mERV 8 filtration
- electrostatic pleated design
- 4-pack for multiple units
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2
Best Value Filtrete 18x18x1 Air Filter, MPR 300, MERV 5
Best basic filtration: MPR 300/MERV 5 pleated option suited for low-resistance, everyday dust control
3-month pleated air filter with exclusive 3-in-1 Filtrete technology to trap particles and improve air quality. Customers note good value, easy installation, and effective dust capture
- MPR 300 / MERV 5 filtration
- 3-month pleated filter
- exact dimensions close to nominal
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3
Filtrete 12x20x1 MERV 11 2-pack air filter
Best for finer particle capture: MERV 11 two-pack balances higher filtration with manageable airflow
Pleated Filtrete air filter with 3-in-1 technology for cleaner air. Helps reduce dust and allergens; customers note easy installation and improved air quality
- 3-in-1 filtration technology
- two-pack for multi-month use
- captures fine particles
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4
Filtrete 16x24x1 Air Filter, MPR 300, MERV 5
Best for mid-size vents: MPR 300/MERV 5 pleated filter that fits common 16x24x1 openings
Pleated 16x24x1 air filter with 3-in-1 technology. Helps capture particles for a cleaner, fresher home environment. Customers say it fits standard HVAC systems and is easy to install
- 3-in-1 filtration technology
- 3-month pleated filter design
- 6-pack for multiple replacements
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5
Filtrete 14x30x1 MPR 300 Pleated Air Filter
Best long-run size option: pleated MPR 300 media in a narrow profile for less frequent replacements
Pleated air filter with 3-in-1 Filtrete technology to capture particles and improve indoor air quality. Customers note easy installation and fit in standard HVAC systems
- 3-in-1 filtration technology
- exact dimensions 13.81 x 29.81 x 0.81
- ease of installation
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6
Filtrete 24x24x1 MPR 300 Air Filter 3-Month Pleated, 6-pack
Best bulk value for large filters: six-pack of 24x24x1 pleated MPR 300 filters for big systems
Filtrete 24x24x1 pleated air filter with exclusive 3-in-1 technology to trap particles and improve air quality. Customers note easy installation and effective dust capture
- 3-month pleated filtration
- MPR 300 filtration efficiency
- 6-pack for multiple filters
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7
Filterbuy 16.38x21.5x1 MERV 8 air filter
Best MERV 8 alternative: pleated MERV 8 filter sized for less common vents that need better capture
Air filter with MERV 8 for dust and allergy defense. Easy installation and compatible with furnaces, air conditioners, or heat pumps. Customers note good fit and value, but some find size slightly off and components a bit flimsy
- actual size close to 16.50 x 21.50 x 0.75
- electrostatic pleated design
- made in USA
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8
Filterbuy 12x18x1 MERV 8 Pleated Air Filter (4-Pack)
Best compact 4-pack: MERV 8 pleated filters in small dimensions for tighter return grilles
MERV 8 pleated air filters for furnaces, air conditioners, or heat pumps. Improves HVAC efficiency and air quality. customers note easy installation and good value alongside fit concerns
- MERV 8 filtration
- universal 12x18x1 compatibility
- electrostatic pleated design
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9
Filterbuy 14x24x1 Air Filter, MERV 8, 4-Pack
Best mid-size 4-pack: MERV 8 pleated option tailored to 14x24x1 slots for regular maintenance
14x24x1 electrostatic pleated air filters with MERV 8 for dust and allergy defense. Improves HVAC efficiency and air quality. Customers say easy to install and effective at reducing sneezing
- universal compatibility
- electrostatic pleated design
- MERV 8 filtration
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10
Filtrete 14x24x1 Filter, MPR 300, 3-month pleated dust filter
Best budget-fitting option: 3-month MPR 300 pleated filter sized for common 14x24x1 installations
Filtrete 14x24x1 pleated air filter with MPR 300 and MERV 5 for cleaner indoor air. Customers note easy installation and effective dust capture, with some size and sturdiness mixed reviews
- 3-in-1 technology for cleaner air
- MPR 300, MERV 5 filtration
- dimension: 13.81 x 23.81 x 0.81 inches