USC Sleeve/Standard Grille
USC Sleeve/Replacement Grille*
stanDarD grille – expanded aluminum
For use with USC sleeve. (Ships with USC sleeve).
*replaCement grille – high-tech plastic
For use on existing sleeves without any grille. (Ships with
chassis).
important note:
When installing into an existing sleeve, consult Installation
Section of your Installation/Operation Manual to determine
whether or not the grille needs to be replaced and/or a
baffle adapter should be used.
Installation Accessories (WallMaster only)
DK / Drain Kit
Installed at the back of the unit and allows
for attachment to permanent condensate
disposal system, if disposal is necessary
or desired.
SB / Sub Base
Used as a base for the unit when
it is desired to place the cord and
receptacle within the installation, or
simply as a base for the unit when
mounted low in the wall.
BAK / Baffle Adapter Kit
Necessary when installing in a sleeve
deeper than 16 3/4" deep, such as
Fedders B sleeve (19 3/4" deep).
IDK / Internal Drain Kit
New construction applications where
a condensate drain system has been
built into the wall interior.
16 3/4"
Fedders B
19 3/4”
important:
Operating the air conditioner
with incorrect rear grille or
without Baffle Adapter Kit
(on 19 3/4” deep sleeve) will
recirculate discharge air and
cause compressor overload
to trip.
CORRECT Vertical Louvers
INCORRECT Horizontal Louvers
WSC Sleeve/Standard Grille WSC Sleeve/Optional Architectural Grille, AG
Model
Height
Width Depth
Depth
with
Front
Minimum
Extension
Into Room
Minimum
Extension
Outside
Thru-the-wall
Finished Hole
Height
Width
WALLMASTER
WSC Sleeve
Chassis
16 3/4"
27"
16 3/4"
23"
7 1/2"
9/16"
17 1/4"
27 1/4"
15 3/4" 26 1/2"
21"
–
–
–
–
–
UNI-FIT
USC Sleeve
15 1/2" 25 7/8"
16 3/4"
20 1/2"
–
1/2"
15 3/4"
26 1/8"
US Chassis
14 3/8"
24"
20 1/8"
3 3/4"
–
–
–
UE Chassis
14 3/8" 24 5/8"
19 5/8"
3 1/2"
–
–
–
important:
• Sleeves are sold and shipped separately to accommodate
new construction and replacement requirements
Sleeve/Chassis Dimensions
Exterior Grilles
Exterior Grilles
When should you
install a solid side
sleeve?
SOLID SIDE wall sleeve
allows for installation in thick
exterior walls where the
installation of room air units
with side vents would effect
performance and may even
void the warranty.
Commercial
and residential
applications
ROOM AIR CONDITIONER
Blocked side vents restrict air flow
FRIEDRICH THRU-THE-WALL
Solid-side sleeve (no side vents)
