20x25x4
Shop our 20x25x4 furnace filters and choose the filtration level that works best for you.
Which 20x25x4 filter should you choose?
20x25x4 is the nominal filter size. Actual dimensions can vary slightly by brand and model. Before ordering, always check the exact dimensions listed on the product page.
The MERV rating helps you compare filtration levels. Filter life can also vary quite a bit from one model to another.
MERV 8
A good choice for everyday filtration. We offer an economical option as well as a longer lasting model that needs to be replaced less often.
MERV 9
The Camfil Dual 9 is designed to last much longer than a standard filter. Depending on use, it can last 9 to 12 months.
MERV 11
Captures more small particles than a MERV 8. It is a good choice if you want more filtration without necessarily moving up to MERV 13.
MERV 13
This is the highest filtration level among the options shown here. It captures more fine particles from the air.
Before choosing MERV 13
A MERV 13 filter can be more restrictive for some heating and cooling systems. If you are not sure your system can use one, check the manufacturer's recommendations.
Compare the price, filtration level and filter life of each option to find the one that works best for your needs.