This 26 inch sleeve fits Friedrich Uni-Fit US and UE models. US chassis with front fully installed into USC sleeve extends into room 3 3/8”. UE chassis with front fully installed into USC sleeve extends into room 2 7/8”. 1” gap on sides and 1/2” gap at top can be covered by two-piece trim ring (included with the air conditioners) that fits over the chassis front.
This sleeve is required for new installations and is sold and shipped separately fron the Uni-Fit air conditioners. A standard grille ships with the USC sleeve.
Through-the-Wall Finished Hole Dimensions