About This Item

• Nominal Size: 20 X 25 X 4, Actual Size: 19 1/2 X 24 1/2 X 3 5/8 (19.5 X 24.5 X 3.63)
• Measure Your Air Filter For The Exact Size And Compare It To Our Actual Size To Ensure Proper Fit.
• If You Are Replacing A Honeywell Or Lennox 20X25X4 Or An Air Filter With An Mpr Rating With An Actual Depth Of 4 3/8, Please See Our 20X25X5 (4 3/8 Actual Depth)
• Nordic Pure Merv 10 Is Equivalent To Mpr 1000
• Made In The Usa