Most TCL Through-the-Wall (TTW) models are designed to fit standard 26" wall sleeves.

The recommended sleeve dimensions are 26” wide × 15 5/8” high × 16 3/4” - 20" deep.  While the width and height of the sleeve can be slightly larger, using proper insulation between the unit and the sleeve is strongly recommended to ensure a tight seal and optimal efficiency.

The depth of the sleeve may vary, as TCL TTW units are designed to extend slightly beyond the front of the sleeve.