20x21x5 Accumulair Replacement Filter for Lennox

Replacement for OEM Part/Model Numbers: X8790 and PCO14-23

Product Features:

• Nominal Size: 20x21x5
• Actual Size: 20x20.63x4.38
• No assembly required.
• Easily inserts into and out of existing return grille.
• Lasts Up to 6 Months