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🌬️ Elevate your air game — because your lungs deserve the best!
Filterbuy’s 14x20x4 MERV 11 Pet & Allergy Defense air filters deliver superior allergen and dust capture with 95% efficiency using electrostatically charged pleated media. Featuring a durable, recyclable beverage board frame with dual wire backing, these filters resist warping and extreme temperatures while lasting three times longer than standard fiberglass models. Designed for universal compatibility with furnaces, ACs, and heat pumps, they optimize HVAC performance and energy use. Proudly made in the USA, this 2-pack ensures cleaner air and peace of mind for every home or business.
| ASIN | B00CK036EA |
| Air Filter Construction | Pleated |
| Best Sellers Rank | #523 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #27 in Furnace Filters |
| Brand | Filterbuy |
| Brand Name | Filterbuy |
| Common Applications | Allergen Reduction, High Strength |
| Compatible Devices | Air Cleaner, Air Conditioner, Furnace, HVAC System, Heat Pump |
| Compatible Hvac Systems | Commercial, Industrial, Residential |
| Customer Reviews | 4.5 out of 5 stars 90 Reviews |
| Filter Airflow Direction | Variable |
| Filter Mounting Type | Slide In |
| Filter Shape | Rectangular |
| Included Components | Air Filters |
| Item Dimensions L x W x Thickness | 19.5"L x 13.5"W x 3.63"Th |
| Item Type Name | Air Filter |
| Item Weight | 6 pounds |
| MERV Rating | 11 |
| Manufacturer | Filterbuy |
| Manufacturer Part Number | AFB14x20x4M11pk2 |
| Material | Aluminum, Plastic, Polypropylene |
| Material Type | Aluminum, Plastic, Polypropylene |
| Max Temperature | 200 °F |
| Max Velocity | 615 cfm |
| Model Number | AFB14x20x4M11pk2 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Product Dimensions | 19.5"L x 13.5"W x 3.63"Th |
| Product Grade | Replacement Parts |
| UPC | 717267044615 |
| Unit Count | 2 Count |
| Warranty Description | Defective items and products that were shipped incorrectly are subject to a refund or replacement on a case by case basis. Please contact our customer support team for more information if you experience any issues. |
E**R
They work well
I order these because local stores do not carry 4" filters. 4" filters give you much more surface area than 1" filters of the same size. Therefore your furnace motor does not have to work as hard to push air through the filter saving energy. Also the greater surface area means the filter will last longer than one with less surface area
V**P
onky place to get this size
works well
B**4
Great filter package!
Great package headed in to furnace season. Nice not to have to search for it from multiple local stores that seem to never carry this size. Good fit. Seems like its pretty well made.
C**.
4" filter not that professional
The 4" furnace filter that I purchased was an odd size. When I received this product I could see that they had taken a larger filter and cut it down. In doing this there is not the best seal on the end of the filter, but it appear to be working OK.
A**A
Perfect
Perfect size but I didn’t know which end was up
R**D
Works great
Worked great
B**S
exactly what I was looking for
works great.
M**S
Not impressed with filter quality
One would think for the price that you would get a quality product. The folds are glued all over the place and glued in right next to each other where air can not get through. There are gaps on the side of the filter where they didn’t glue the filter to the frame. Seems like this product should be a lot cheaper for what you get. You can defiantly get cheaper filters that are better made. I do not recommend buying these cheaply made filters.
Trustpilot
1 month ago
2 days ago