Hearth & Home Technologies 21M-ACC User Manual

Page  16

7039-131F

September 1, 2008

R

Chimney Height / Rise and Run
This product was designed for and tested on a 6 inch (152mm) 

chimney, 14 to 16 feet (420-480cm) high, (includes stove 

height) measured from the base of the appliance.  The further 

your stack height or diameter varies from this configuration, 

the possibility of performance problems exists. 
Chimney height may need to be increased by 2 - % per 

each 1000 feet above sea level.  It is not recommended to 

use offsets or elbows at altitudes above 4000 feet above sea 

level or when there are other factors that affect flue draft.

Single wall connector or stove pipe.  
This must be at least 24 gauge mild steel or 26 gauge blue 

steel.  The sections must be attached to the appliance and to 

each other with the crimped (male) end pointing toward the 

stove.  All joints, including the connection at the flue collar, 

should be secured with  sheet metal screws.  Make sure 

to follow the minimum clearances to combustibles.   Where 

passage through the wall, or partition of combustible con-

struction is desired in Canada, the installation shall conform 

to CAN/CSA-B65.
Factory-built listed chimney connector (vented).
A listed connector (vented) must be used when installing this 

unit in a mobile home.  The listed connectors must conform 

to each other to ensure a proper fit and seal.

Flue Gas 

Direction 

Crimped 

End 

Toward 

Stove 

Secure pipe sections with a 

minimum of 3 screws 

•  Do NOT connect this unit to a chimney flue 

servicing another appliance.

•  Do NOT connect to any air distribution duct 

or system.

May allow flue gases to enter the house.

Improper installation, adjustment, alteration, service or 

maintenance can cause injury or property damage. Refer 

to the owner’s information manual provided with this appli-

ance. For assistance or additional information consult a 

qualified installer, service agency or your dealer.

Fire Risk.
Inspection of Chimney:
•  Chimney must be in good condition.
•  Meets minimum standard of NFPA 211
•  Factory-built chimney must be 6 inch 

(152mm) UL10 HT.

ONLY use connector:

•  Within the room, between appliance and ceiling or wall.

Connector shall NOT pass through:

•  Attic or roof space

•  Closet or similar concealed space

•  Floor or ceiling

Maintain minimum clearances to combustibles

Fire Risk.
Follow Chimney Connector Manufacturer’s 

Instructions for Proper Installation.

Chimney Flue 

Liner 

Fireclay 

Liner or 

Equivalent 

Masonry Chimney 

Constructed to NFPA 211 

Wall Spacer 

Wall Band 

Trim Collar 

Chimney 

 Connector 

1 inch (25mm) Air 

Space to Chimney 

Section 

Min. Clearance 

2 inch (51mm) 

Min. Chimney Clearance to 

Wall Spacer and 

Combustibles - 2 inch (51mm) 

Chimney Section