Filterbuy 18x21x1 Air Filter MERV 11 Superior Pet & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 18.00 x 21.00 x 0.75)

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filterbuy 18x21x1 air filter merv 11 superior pet amp allergy defense 2-pack electrostatic pleated hvac ac furnace filters replacement made in usa actual size 1800 x 2100 x 075

$ 42.78

Last price was updated on: 12th Dec 2025, 12:35 PM

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Current Price $42.78

$36.60

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Lowest Ever

$36.60

12th Mar 2022

Highest Ever

$42.78

28th Mar 2025

Average Price

$42.00

16 data points

Last 3M Low

$42.78

19th Nov 2025

Last 6M Low

$42.78

19th Nov 2025

Last 12M Low

$42.78

28th Mar 2025

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Product Variants

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Product Technical Information

Product Code	B09RKQFTW1
Market Place	amazon.com
Market Place Name	Amazon.com
Brand Name	Filterbuy
Rating	4.5 ( 19879 ratings )
Category	Furnace Filters
Model Number	AFB18x21x1M11Apk2
Item Color	Gold
Item Dimensions	18 x 21 x 1 inches

Frequently Asked Questions

What is the lowest price ever for this product? ▶

The lowest price for Filterbuy 18x21x1 Air Filter MERV 11 Superior Pet amp Allergy Defense 2-Pack Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA Actual Size 1800 x 2100 x 075 was $36.60 on 12th Mar 2022. This is the best recorded deal so far.
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In the last 3 months, Filterbuy 18x21x1 Air Filter MERV 11 Superior Pet amp Allergy Defense 2-Pack Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA Actual Size 1800 x 2100 x 075 reached a low of $42.78 on 19th Nov 2025. Recent price trends may help you decide when to buy.
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