Harman Stove Company XL Manuel D’Utilisation

Only For Qualified Installers

This appliance has been tested and is listed for 

installation with Simpson Duravent GS and Duraflex 

AL venting components. The warranty will be voided, 

and serious fire, health, or other safety hazards may 

result from any of the following actions:

• Installation of any damaged Simpson Duravent  

component.

• Unauthorized modification of the Simpson Du-

ravent System.

• Installation of any component part not manufac-

tured or approved by Simpson Duravent.

• Installation other than as instructed by Simpson 

Duravent and the appliance manufacturer.

Consult your local building codes before begin-

ning the installation, and follow the manufacturer’s 

instructions exactly. The Simpson Duravent venting 

components listed below are approved for use with 

the ShadowLight XL Direct Vent Gas Insert.

Flashing

Chimney Liner Termination 

Kit. Includes flashing.

Stock # 923GK

High Wind Cap

Stock# 991

Chimney Cap Components

Duraflex AL - Flexible Aluminum Pipe Lengths

Size   

Length  

 

Stock #

3” 

 

25’ 

 

 

2270

3” 

 

35’ 

 

 

2280

3” 

 

50’ 

 

 

2290

Typical Chimney

Tile Liner

Vent Pipe

Air Intake Pipe

Uncoil the three inch aluminum chimney liners on the 

ground and measure to make sure the pipes are long 

enough. Mark one of the liners at both ends with paint 

and use it for the exhaust side connection. Once they 

are in the chimney it allows easier identification of 

intake and exhaust connections. 

Flashing

Figure__

Air Intake

Vent

Minimum vertical vent pipe length is 10 Feet.

Maximum horizontal distance is 36”.

A bead of silicone goes 

between the top of 

the tile liner and the 

flashing to seal the cap 

to the chimney

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