Filterbuy deals

Every Filterbuy product we track, with the ones currently below their normal price first.

Products tracked

On sale now

Best discount

10%

Median price

$35.06

7 deals · 3 more tracked

10% off

Filterbuy

Filterbuy 20x20x1 Air Filter MERV 8 Dust & Allergy Defense (4-Pack) | Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 19.50 x 0.75)

$26.96~~$29.96~~

Size: 20x20x1

Price checked Oct 19, 2026, 12:48 PM PDT

Observed offer ends Oct 25, 2026, 11:59 PM PDT

10% off

Filterbuy

Filterbuy 16x20x1 Air Filter MERV 8 Dust & Allergy Defense (4-Pack) | Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 15.50 x 19.50 x 0.75)

$30.56~~$33.96~~

Size: 16x20x1

Price checked Oct 19, 2026, 12:31 PM PDT

Observed offer ends Oct 25, 2026, 11:59 PM PDT

10% off

Filterbuy

Filterbuy 14x25x1 Air Filter MERV 8 Dust & Allergy Defense (4-Pack) | Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 13.50 x 24.50 x 0.75)

$31.46~~$34.96~~

Size: 14x25x1

Price checked Oct 19, 2026, 7:00 AM PDT

Observed offer ends Oct 25, 2026, 11:59 PM PDT

10% off

Filterbuy

Filterbuy 16x25x1 Air Filter MERV 8 Dust & Allergy Defense (4-Pack) | Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 15.50 x 24.50 x 0.75)

$31.46~~$34.96~~

Size: 16x25x1

Price checked Oct 19, 2026, 7:58 AM PDT

Observed offer ends Oct 25, 2026, 11:59 PM PDT

10% off

Filterbuy

Filterbuy 20x25x1 Air Filter MERV 8 Dust & Allergy Defense (4-Pack) | Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 24.50 x 0.75)

$34.16~~$37.96~~

Size: 20x25x1

Price checked Oct 19, 2026, 6:18 AM PDT

Observed offer ends Oct 25, 2026, 11:59 PM PDT

10% off

Filterbuy

Filterbuy 14x30x1 Air Filter MERV 8 Dust & Allergy Defense (4-Pack) | Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 13.88 x 29.88 x 0.75)

$35.96~~$39.96~~

Size: 14x30x1

Price checked Oct 19, 2026, 7:00 AM PDT

Observed offer ends Oct 25, 2026, 11:59 PM PDT

10% off

Filterbuy

Filterbuy 20x30x1 Air Filter MERV 8 Dust & Allergy Defense (4-Pack) | Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.63 x 29.63 x 0.75)

$40.46~~$44.96~~

Size: 20x30x1

Price checked Oct 19, 2026, 7:00 AM PDT

Observed offer ends Oct 25, 2026, 11:59 PM PDT

Below: not currently discounted — showing everything we track

These sit at or above their own normal price. We keep them here so you can see the current price and decide whether to wait.

Filterbuy

Filterbuy 20x25x5 Air Filter MERV 8 Dust & Allergy Defense (2-Pack) | Pleated HVAC AC Furnace Replacement for Honeywell FC100A1037, Lennox X6673 & More (Actual Size: 19.88 x 24.75 x 4.38)

$49.98

Confirm offer eligibility on Amazon

Size: 20x25x5 (Actual: 19.88 x 24.75 x 4.38)

Price checked Oct 19, 2026, 3:44 PM PDT

Filterbuy

Filterbuy 20x25x4 Air Filter MERV 8 Dust & Allergy Defense (2-Pack) | Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 24.50 x 3.63)

$44.98

Confirm offer eligibility on Amazon

Size: 20x25x4

Price checked Oct 19, 2026, 11:30 AM PDT

Filterbuy

Filterbuy 16x25x1 Air Filter MERV 8 Dust & Allergy Defense (6-Pack) | Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 15.50 x 24.50 x 0.75)

$43.98

Confirm offer eligibility on Amazon

Size: 16x25x1

Price checked Oct 19, 2026, 1:35 PM PDT