Heil and Tempstar FSM4X6000 air filter size

Filter size21 1/2 × 23 5/16 × 1"

The Heil and Tempstar FSM4X6000 takes a filter that measures 21 1/2 × 23 5/16 × 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 FSM4X6000. This page also covers FSM4X6000A, FSM4X6000AT. Made by ICP and also sold as Comfortmaker, Arcoaire and KeepRite.

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