Rheem R801T0503A14UHNNA air filter size

Filter size in a side rack16×25×1

The Rheem R801T0503A14UHNNA furnace has no filter of its own. Its filter sits in a rack where the return duct joins it. A rack on the side takes a 16×25×1 filter.

If the furnace sits on Rheem's own rack underneath, that rack takes 12 1/4 × 25 × 1".

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 R801T0503A14UHNNA. This page also covers R801T0503A14UHNNAS. Also sold as Ruud.

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

If your filter isn't in a rack at the furnace

Some homes have the filter behind a grille on the 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 Rheem's product specifications. If it doesn't fit, our fit guarantee sends a new one free. Caliper isn't affiliated with or endorsed by Rheem.