Installation Guide
17
as needed to t your installation. There are 
two options when installing a Tee-Supported 
installation: the Tee Support above the Tee, or 
the Tee Support below the Tee. The required 
parts and general conguration are as shown 
in Figures 23, 24, 25 and 26. 
1. Place Appliance: Position the appliance 
according to the manufacturer’s instructions. It 
is a good idea to try to position the appliance 
so it will allow the chimney to line up centered 
between studs.
2. Locate, Cut & Frame Opening: 
Determine 
the location where the chimney will pass through 
the wall. The chimney should pass through 
the wall, centered between two studs. The 
height of the penetration can be determined 
by positioning sections of stove pipe until you 
have the desired conguration (refer to the 
appliance manufacturer’s installation instructions 
for restrictions on stove pipe). Cut and frame 
an opening in the inner and outer walls at this 
location. Refer to Table 2 for the appropriate 
framing dimensions.
3. Install Wall Thimble:  The Wall Thimble 
is two-piece component which includes the 
Interior half and the Exterior half. On the 
outside wall, install the back portion of the Wall 
Figure 23
Figure 24
Thimble. Center the back portion of the Wall 
Thimble (with shield inside wall) in the framed 
opening of the outside wall. Be sure to seal 
the ange of the Wall Thimble around the wall 
by using a non-hardening waterproof sealant. 
Attach the back portion of the Wall Thimble to 
the outside wall using at least (4) 8-penny nails 
or (4) #8, 1-1/2” wood screws. There must be 
MIN 6 INCHES 
CLEARANCE 
BETWEEN CAP AND 
CHASE TOP
ACCESS DOOR 
FOR CLEANING
CHASE TOP 
FLASHING
FRAMED EXTERIOR 
ENCLOSURE
TYPICAL THRU-
THE-WALL TEE 
SUPPORTED 
INSTALLATION
FINISHING COLLAR
TEE CAP
CHIMNEY SECTION
CHIMNEY TEE
USE 8 PENNY NAILS OR #8, 2 1/2” WOOD 
SCREWS. USE 4 FOR EACH SUPPORT 
LEG. 
TEE BRANCH (MUST 
PENETRATE A MINIMUM 
OF 6 INCHES INTO ROOM)
WALL THIMBLE 
ASSEMBLY
TEE SUPPORT IS ADJUSTABLE TO 
ALLOW FROM 2” - 6” CLEARANCE FROM 
CHIMNEY TO WALL.










