Can I install the ARM-A-DOR on a door less than 36" wide? February 12, 2026 20:13 Updated Catalog FAQ's Can I install the ARM-A-DOR on a door less than 36" wide? Answer The Arm-A-Dor device is designed to fit 3-4 ft doors. It will not fit a door less than 36" (3ft) or greater than 48" (4ft). Applies To ARM-A-DOR Related to Arm-A-Dor Related articles Can I install the ARM-A-DOR on door jambs deeper than 6 3/4" ? ARM A DOR FAQ's Why does the Arm-A-Dor alarm sounds when I arm my unit and the door in the locked position? Electrical Products Installation Instructions 5 Knuckle CB Full Mortise Hinge Templates