Filterbuy 18x20x4 Air Filter MERV 11 Superior Pet & Allergy Defense (6-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 17.50 x 19.50 x 3.63)

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filterbuy 18x20x4 air filter merv 11 superior pet amp allergy defense 6-pack electrostatic pleated hvac ac furnace filters replacement made in usa actual size 1750 x 1950 x 363

$ 145.62

Last price was updated on: 12th Dec 2025, 12:37 PM

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Current Price $145.62

$106.93

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$146.98

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Price History Benchmarks

Lowest Ever

$106.93

17th Aug 2017

Highest Ever

$146.98

27th Jun 2024

Average Price

$136.67

23 data points

Last 3M Low

$145.62

19th Nov 2025

Last 6M Low

$145.62

19th Nov 2025

Last 12M Low

$145.62

29th Mar 2025

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Product Variants

Image of Filterbuy 16x25x1 Air Filter MERV 11 Superior Pet & Allergy Defense (6-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 15.50 x 24.50 x 0.75)

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Product Technical Information

Product Code	B00CK041DU
Market Place	amazon.com
Market Place Name	Amazon.com
Brand Name	Filterbuy
Rating	4.6 ( 10447 ratings )
Category	Furnace Filters
Model Number	AFB18x20x4M11pk6
Item Color	Gold
Item Dimensions	17.5 x 19.5 x 3.75 inches

Frequently Asked Questions

What is the lowest price ever for this product? ▶

The lowest price for Filterbuy 18x20x4 Air Filter MERV 11 Superior Pet amp Allergy Defense 6-Pack Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA Actual Size 1750 x 1950 x 363 was $106.93 on 17th Aug 2017. This is the best recorded deal so far.
What is the highest price ever for this product? ▶

The highest price for Filterbuy 18x20x4 Air Filter MERV 11 Superior Pet amp Allergy Defense 6-Pack Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA Actual Size 1750 x 1950 x 363 was $146.98 on 27th Jun 2024. Prices have dropped since then.
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The average price for Filterbuy 18x20x4 Air Filter MERV 11 Superior Pet amp Allergy Defense 6-Pack Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA Actual Size 1750 x 1950 x 363 is $136.67 (23 data points). This helps you compare current deals.
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In the last 3 months, Filterbuy 18x20x4 Air Filter MERV 11 Superior Pet amp Allergy Defense 6-Pack Electrostatic Pleated HVAC AC Furnace Filters Replacement Made in USA Actual Size 1750 x 1950 x 363 reached a low of $145.62 on 19th Nov 2025. Recent price trends may help you decide when to buy.
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Worth buying. The price is good, but you may wait for a better deal.