Heil replacement air filters

Caliper makes replacement air filters that fit Heil furnaces, air handlers and AC systems. What matters is the size of your filter slot, not the brand on the unit, so you'll get an exact fit either way.

Find your size

The quickest way: check the edge of the filter that's in there now. The size is printed on the frame, like 16x25x1. You can also take a photo of your old filter, or of the label on your Heil unit, on our home page and we'll read it for you.

By model number

FCM4X2400 FCM4X3600 FCM4X4800 FCM4X6000 FEM4P1800 FEM4P2400 FEM4P3000 FEM4P3600 FEM4P4200 FEM4P4800 FEM4X1800 FEM4X2400 FEM4X3000 FEM4X3500 FEM4X3600 FEM4X4200 FEM4X4800 FEM4X6000 FSM4P1800 FSM4P2400 FSM4P3000 FSM4P3600 FSM4P4200 FSM4P4800 FSM4X1800 FSM4X2400 FSM4X3000 FSM4X3600 FSM4X4200 FSM4X4800 FSM4X6000 N9MSE0401410A N9MSE0401712A N9MSE0601410A N9MSE0601714A N9MSE0801716A N9MSE0802120A N9MSE1002114A N9MSE1002120A N9MSE1202420A N9MSE1402420A

Where the filter lives

On most Heil systems, the filter sits in a slot next to the blower, in a wall or ceiling return grille, or in a separate filter cabinet. Cabinets usually take thicker 4" or 5" filters, which last longer.

Common sizes in homes

Don't see yours? See every size, or order a custom size.

Caliper isn't affiliated with or endorsed by Heil. We use the name only to help you find a filter that fits your equipment.