Free shipping on every U.S. order — no minimum
Filter King Support
Sizing & MERV help

Find the right filter size

Send a photo of your current filter or its label, the dimensions, your unit model, or your MERV preference. Our sizing team replies within the hour.

  • A photo of the filter itself or its printed label is best — a photo of just the unit is often not enough.

  • Measure to the nearest 1/4 inch.