Home > Furnace Filters > Filterbuy 20x25x4 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.50 x 24.50 x 3.63 Inches) ; Visit the Filterbuy Store
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57,317 reviews
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62 products
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Furnace Filters
Experiential insights by users
About FilterBuy 20x25x4 Air Filter MERV 8, Pleated HVAC AC Furnace Filters
Overall Feedback:
89% positive
86% liked its compatibility, but 14% had issues with compatibility
I received a filter that did not fit tightly into the filter housing and was smaller than the expected 20x25x4 size, causing installation issues.
The size of the actual filter is different from what's written on the box. The Filterbuy filter easily slipped into place without filling the gap.
88% found it easy to install and replace, but 12% had difficulties
The filter is smaller than the one I was replacing and doesn't fit tightly into the housing. I had to use spacers to make it fit properly.
81% liked the long-lasting filter, while 19% thought it needed frequent replacements
The filter is not filling the space properly and the pull from the air handler is sucking it over to one side.
I had to put spacers around the filter to get it to fit right, indicating that it may not be a perfect fit and could have an impact on longevity.
84% appreciated its high filtration efficiency, while 16% thought it was mediocre
I want a cheaper replacement for a 20x25x4 Filtrete furnace filter.
After using the Filterbuy filter, my furnace is not working properly. The temperature was set to 66 degrees but it was only 62 degrees when checked on the thermostat.
The filter size is not as per the specifications and it doesn't fill the space as the OEM filter does. Also, the pull from the air handler sucks it over to one side.
88% liked its compatibility with various furnace models
83% liked the long-lasting filter
Experiential insights by users
I am frustrated with the lack of transparency in the sizing of the filters, which is crucial for air quality improvement. The company should provide the actual sizing up front, rather than hiding it as a secret.
The filters are catching junk that the old brand was letting through. I also compared the color of both sides of the filter to the old ones even after a week.
93% liked its compatibility with various furnace models
94% found it easy to install and replace
89% liked the long-lasting filter
Experiential insights by users
I faced a problem with the filter's compatibility. It is not staying in place when installed in the ceiling. It is a challenge to line up the filter and close the cover to hold it in place.
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