Hearthstone Quality Home Heating Products, Inc
® Green Mountain Insert 70 (Model 8450)
17
possibility of obstruction by snow, leaves or other
material.
Install the Outside Air Supply:
Using pliers, remove the rectangular knock-out
plate (A) located on the left or right side of the
convection air jacket. Choose the side that is best
for your installation.
Note: Only remove the knock-out that will be
connected to the fresh air inlet.
Figure 9
– Outside Air Inlet
Figure 10
– Outside Air Kit Detail
Then, install the fresh air kit adapter (B) using 4
screws (C). Secure the flexible pipe
1
(E) to the
adapter (B) using one of the adjustable pipe clamps
(D). Secure the other end of the pipe to the outside
wall termination (F) using the second adjustable
pipe clamp (D). The outside wall termination (F)
must be installed outside of the building.
1
The pipe must be HVAC type, insulated, and must
comply with ULC S110 and/or UL 181, Class 0 or
Class 1.