Hearth & Home Technologies CUMBGAP-PMH User Manual

R

Page 14

September 1, 2008

7006-188E 

First, make the frame for the thimble, ensuring it is no smaller 
than 14" (356mm) square to maintain a 2" (51mm) air space 
around the chimney section.  

Attach the wall spacer to the chimney side of the frame.  Then 
insert the frame into the opening, toe nailing it to the wall studs.  
Install the wall band in the framing to secure the chimney 
section in place.  

Insert a single section of chimney connector into the chimney 
through the wall band, being sure it does not protrude into the 
chimney beyond the edge of the chimney flue lining.  

Apply high temperature furnace cement to the end of the 
chimney section and install it over the connector, through the 
wall spacer.  Tighten the wall band to hold the chimney section 
firmly in place and against the chimney.  

Install the trim collar on the outside of the opening.  Check to 
ensure there is a 1" (25mm) air space between the connector 
and the chimney section.  

During installation ensure that a 2" (51mm) air space to 
the wood framing is maintained.  Do not fill this space with 
insulation.  Insulation in this air space will cause a heat buildup 
which may ignite the wood framing.

Chimney Flue Liner

Fireclay 

Liner or 

Equivalent

Masonry Chimney 

Constructed to NFPA 211

Wall Spacer

Wall Band

Trim Collar

Chimney

 Connector

1" (25mm) Air Space 

to Chimney Section

Min. Clearance 

2" (51mm)

Min. Chimney Clearance 

to Wall Spacer and 

Combustibles - 2" (51mm)

Chimney Section

Trim Collar

Chimney Section 

with 2" (51mm) 

Clearance to 

Combustibles

Chimney 

Connector

Fire Clay 

Flue Liner

with Airspace

Masonry

 Chimney

Wall Band to 

Secure Chimney 

Section

Wood Studs Used for 

Framing - Spaced 2" 

(51mm) clearance from 

Masonry Chimney

Wall Spacer

There are several kits available to connect the 
stove to a masonry fireplace.  Look for a listed 
kit.  The kit is an adapter which is installed 
at the location of the fireplace damper.  The 
existing damper may have to be removed to 
allow installation of the kit. 

The key points of this type of stove connection 
are that the connector pipe must extend up the 
chimney above where the fire clay liner starts, 
and the areas of the kit installation and penetra-
tion should fit tightly and be sealed with high 
temperature furnace cement unless the kit’s 
instructions state otherwise.  (See Figure 14C.)  
The tight fitting installation aids the proper draw 
of the chimney.

Support Plate & Clamp

Listed Rigid
Stainless Liner

Stainless Steel
Flex Section

Stainless Connector Pipe

Carry Stovepipe
Above the Liner

Damper Plate is 
Removed or 
Fastened in Open 
Position

Use Damper Adapter or 
Seal With Sheetmetal 
and Sealant

Cleanout

Stainless Tee with Cleanout

Fireclay liner 5/8" 
(16mm) Minimum or 
Equivalent.