Installation Guide
A MAJOR CAUSE OF VENT RELATED FIRES IS FAILURE 
TO MAINTAIN REQUIRED CLEARANCES (AIR SPACES) TO 
COMBUSTIBLE MATERIALS. IT IS OF THE UTMOST IMPORTANCE 
THAT DOUBLE WALL DURATECH BE INSTALLED ONLY IN 
ACCORDANCE WITH THESE INSTRUCTIONS.
NOTE:
Read through all of these instructions before 
beginning your installation. Failure to install 
as described in this instruction will void the 
manufacturer’s warranty, and may have an 
effect on your homeowner’s insurance and 
UL listing status. Keep these instructions for 
future reference. This booklet also contains 
instructions for installing a venting system 
within an existing masonry chimney, and 
for installations passing through a cathedral 
ceiling.
Dear Customer, Installer, or End User:
We welcome any comments regarding matters 
pertaining to our DuraVent products. 
We welcome any ideas, input or complaints 
and I’ll make sure that someone responds 
directly back to you.
Send your emails to: 
president@duravent.com
If you are searching for tech support or product 
information, please phone us at 800-835-4429.
Or email us at:
techsupport@duravent.com
LISTED 
MH7399










