Best Furnace Filters Under $100 (2026)
We scored filters by MERV/MPR rating, available sizes and pack counts, price under $100, and expected value per replacement interval
The Verdict
- Best Overall: Filterbuy 17.5x23.5x1 Air Filter, MERV 8, 4-Pack — pick for balanced filtration and multi-pack convenience with MERV 8 pleated performance
- Best Value: Filtrete 18x18x1 Air Filter, MPR 300, MERV 5 — Good budget option for basic dust control in common 18x18x1 systems with MPR 300 efficiency
Top Picks
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1
Best Overall Filterbuy 17.5x23.5x1 Air Filter, MERV 8, 4-Pack
pick for balanced filtration and multi-pack convenience with MERV 8 pleated performance
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
Good budget option for basic dust control in common 18x18x1 systems with MPR 300 efficiency
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 higher filtration needs in smaller systems with MERV 11 performance in a compact 2-pack
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
Solid economical choice for 16x24x1 applications offering pleated filtration with MPR 300
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
Suitable for longer filters and larger return grilles where pleated MPR 300 filtration is required
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
Value-focused six-pack option for large 24x24x1 filters that simplifies regular replacements
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 12x18x1 MERV 8 Pleated Air Filter (4-Pack)
Reliable multi-pack solution for 12x18x1 slots delivering consistent MERV 8 pleated filtration
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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8
Filterbuy 16.38x21.5x1 MERV 8 air filter
Good mid-size option offering MERV 8 performance in a less common dimension for tailored fits
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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9
Filterbuy 14x24x1 Air Filter, MERV 8, 4-Pack
Convenient four-pack for 14x24x1 installations providing steady MERV 8 pleated filtration
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
Practical choice for 14x24x1 systems needing regular three-month replacement with pleated MPR 300 filtration
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