Carrier FB4CNP025 air filter size

Filter size16 3/8 × 21 1/2 × 1"

The Carrier FB4CNP025 takes a filter that measures 16 3/8 × 21 1/2 × 1", a length stores don't stock. We cut it to fit, to within 1/16 inch, in the USA.

Is this your unit?

The model number is on the label on the side of the unit or inside its front panel. It starts with FB4CNP025. This page also covers FB4CNP025L, FB4CNP025L00. The same units are sold as Bryant.

Not sure? Take a photo of the label and we'll read it for you.

If your filter isn't in the unit

Many closets have the filter behind a grille on the door, wall or ceiling instead. That one is sized by the grille, not the unit. The size is printed on the filter's edge, or you can photograph it on our home page.

Size from Carrier's product specifications. If it doesn't fit, our fit guarantee sends a new one free. Caliper isn't affiliated with or endorsed by Carrier.