Filtrete 20x25x1 Air Filter, MPR 300, MERV 5, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters

Filtrete Clean Living Basic Dust air filters arrive as a set of six 20x25x1 pleated panels built for residential furnace, air conditioning and HVAC equipment. The media carries an electrostatic charge, which is how the filter draws airborne dust and particles toward the pleats as air passes through on its way back into the room. Filtrete rates this model at MPR 300 and MERV 5, placing it at the entry point of the brand's range. The manufacturer recommends swapping each panel out on a 90 day cycle, and a six pack covers a year and a half of changes in a single system.

• Nominal size 20x25x1; actual panel measures 19.69 x 24.69 x 0.81 inches
• Ratings: MPR 300, MERV 5
• Electrostatically charged filter media, white, 1 inch pleated depth
• Six filters per box, 3 month service interval each

When installing a panel, slide it into the filter slot with the arrow on the frame pointing toward the blower motor, which is the direction air travels through the system. A snug fit matters because gaps around the edges allow unfiltered air to bypass the media entirely, defeating the purpose of the filter. Before inserting a new panel, wipe the slot edges with a dry cloth to clear any accumulated debris that might prevent a proper seal. Store unused filters flat in a cool, dry location away from humidity, as moisture can compromise the electrostatic charge in the media before the panel ever reaches the unit.

This product is a reasonable starting point for households without allergy concerns or pets, where the primary goal is keeping dust off coils and mechanical components rather than improving breathing air quality to a high degree. If the home has heavy foot traffic or multiple shedding animals, a higher MPR rating would capture finer particles more effectively. When comparing 20x25x1 filters across brands, confirm the actual dimensions rather than relying on nominal sizing, since a fraction of an inch difference can mean a loose fit in some units. Checking the filter monthly and replacing it earlier than the 90-day mark is advisable in dusty environments or during periods of heavy system use.