Hearth & Home Technologies MBK 사용자 설명서

Page 15

7004-187F   September 1, 2008

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When a metal prefabricated chimney is used, the manufacturer’s 
installation instructions must be followed precisely.  It will 
be necessary to install the ceiling support package or wall 
pass through, “T” section package, firestops (when needed), 
insulation shield, roof flashing, chimney cap, and any other 
materials deemed necessary by the instructions of the 
prefabricated chimney manufacturer.  Maintain the proper 
clearance to the structure as recommended by the chimney 
manufacturer.  This clearance is usually a minimum of 2 
inch (51mm), although it may vary by manufacturer or for 
certain components. Follow the chimeny manufacturers’ 
instructions carefully.

There are basically two methods of metal chimney installation.  
One method is to install the chimney inside the residence 
through the ceiling and the roof. Install an attic insulation shield 
to maintain the specified clearance to insulation.  Insulation in 
this air space will cause a heat buildup which may ignite the 
ceiling joists. This method of installation requires, at minimum, 
a ceiling support package, an insulation shield and roof 
flashing. See Figure 15A. 

The other method is to install an exterior chimney that runs 
up the outside of the residence.  See Figure 15B.  The 
components illustrated may not look exactly like the system 
you purchase, but they demonstrate the basic components 
necessary for a proper and safe installation.

The chimney must be the required height above the roof or 
other obstruction for safety and for proper draft operation.  The 
requirement is that the chimney must be at least 3 ft. (91cm) 
higher than the highest point where it passes through the roof 
and at least 2 ft. (61cm) higher than the highest part of the 
roof or structure that is within 10 ft. (305cm) of the chimney, 
measured horizontally. (See Figure 11A on  page 11)

Floor
Protector

Chimney 
Connector

Combustible
Ceiling

Combustible Wall

Insulated "T"

Flashing

Listed Cap

Maintain 2" (51mm) 
Clearance Through Eave

Listed 
Chimney Pipe

Chimney 
Connector

To Stove

Trim Collar 
on Inside 
Wall

Combustible Outside Wall

2" (51mm) 
Clearance

Listed Chimney

Insulated "T"

Wall Support

Wall Spacer on 
Outside Wall

Refer to Clearances to Combustibles

Combustible Wall

Floor 
Protector

Chimney 
Connector

Ceiling Support

Listed Chimney

Maintain 2" (51mm) 
Clearance

Listed Cap

Storm Collar

Flashing

Refer to Clearances 

to Combustibles

Combustible 
Ceiling 
Joists

Chimney 
Connector

To Stove

Ceiling 
Support

Specified 
Clearance

Attic 
Insulation 
Shield

Listed 
Chimney