M&G DuraVent Combustion Air Systems - Manual (Page 11)

11
Figure 12
CHASE AIR INTAKE
WITH RODENT GUARD
PROVIDES A 6"
DIAMETER OPENING
FOR VENTILATION INTO
CHASE.
Tee with the Tee Support as detailed in the full
DuraTech installation instructions. Continue to
install the remainder of the chimney system as
described in those installation instructions.
Step 6. Ensure CAS system has access to
outside air. The CAS system needs to have
access to outside air for the stove to use. If
the chimney is unenclosed on the outside of
the home, no steps are needed to provide air.
The outside portion of the CAS Wall Thimble
has air-inlet openings to provide air to the
stove. However, if the chimney is enclosed in
a chase, the chase needs to have ventilation
to supply air for the CAS system. This opening
can be provided by the Chase Air Intake with
Rodent Guard (Fig 12) or by a small opening
in the chase that provides a minimum of 12
square inches of free area (opening can be
louvered or covered with mesh screen).
Step 7. Continue to install remainder of the
chimney system according to the complete
DuraTech installation instructions; L150
DuraTech Installation Instructions.