DuraVent DuraTech Adjustable Length - Manual (Page 2)

A MAJOR CAUSE OF CHIMNEY
RELATED FIRES IS FAILURE TO
MAINTAIN REQUIRED CLEARANCES
(AIR SPACES) TO COMBUSTIBLE
MATERIALS. IT IS OF THE UTMOST
IMPORTANCE THAT THIS CHIMNEY
BE INSTALLED ONLY IN
ACCORDANCE WITH THESE
INSTRUCTIONS.
APPLICATION AND LISTING
A DuraTech Adjustable Length is a listed com-
ponent of the UL Listed DuraTech Chimney
System (MH7399). Installation of the Adjust-
able Length must comply with both these
supplementary installation instructions and the
full DuraTech Chimney Installation Instructions
(L150).
INSTALLATION NOTES
Practice good workmanship. Exercise extreme
caution when working on roofs. Be sure to
wear appropriate safety gear and clothing
as needed. You must useonly authorized
DuraTech Chimney parts to maintain a listed
Chimney system (not including the connector
pipe). Do not mix parts or try to match with
other products, or use improvised solutions.
Do not install damaged or modified parts.
Refer to the full DuraTech Chimney Installation
Instructions for further safety details.
WARNING
DuraTech Chimney system is listed with a
2” minimum clearance (air space) to com-
bustibles. Always maintain a minimum of 2”
clearance between chimney pipe and nearby
combustibles. Failure to maintain the minimum
2” clearance to combustibles can result in a
fire hazard.
INSTALLATION
The DuraTech Adjustable Length is used
when an exact length of chimney is needed
and standard lengths of chimney are not
sufficient. The Adjustable Length spans from
minimum of 14” to a maximum of 22” and can
be used between any other DuraTech chimney
sections (straight pipe lengths, elbows, tees,
etc.). The Adjustable Length is a telescoping
section of chimney with both male and female
sections (Figure 1). Within the male section
there are 2” wide strips of insulation that can
be removed to allow for a customized length
(Figure 2).
Figure 1
Figure 2
2” WIDE
INSULATION
STRIPS
14” - 22”
MALE END
SECTION
IF NEEDED, ADJUST
LENGTH BY REMOVING
STRIPS OF INSULATION
(SEE TABLE 1).
MIN 2”
OVERLAP
FEMALE END
SECTION