Hearthstone Quality Home Heating Products, Inc
WAITSFIELD Model 8770
13
Figure 8 -
Termination Cap clearances
Prefabricated & Fireplace Chimney
Installations
The Waitsfield 8770 is approved for use with direct
vent chimney conversion kits in masonry or
prefabricated solid fuel listed chimneys. The
following installation requirements must be followed:
The termination must fall within the chart shown
in Figure 12.
In a masonry chimney, a fireclay liner or listed
steel liner, must be present the entire length of
the chimney.
The maximum vertical length of vent is 35’.
The liner must have an inside dimension or
diameter 6” or greater.
Prefabricated chimneys must be UL103 or ULC
S-629 listed and have a minimum INSIDE
diameter of 6”. Prefabricated chimneys must be
listed for the specific manufacturer’s conversion
kit.
The use of an existing chimney as an air intake is
not listed under the ANSI Z21.88-09-CSA 2.33-09
test methods; this installation has been tested and
approved by Intertek Testing Services with an
appropriate test. The code authority having
jurisdiction must be consulted prior to proceeding
with this installation method. See examples below.
Figure 9
– Existing Chimney Venting Options
Horizontal Termination
The termination must fall within the area shown
in Figures 11 & 12.
A minimum of 36" rise is required directly off the
heater.
Use a vinyl siding Stand-Off when installing
against vinyl siding. The termination cap must
not be recessed into the wall or siding. Do not fill
air spaces with any type of insulation material.
A minimum 10” x10” square hole is necessary
for proper pipe clearance through a wall,
provided the vent is positioned to maintain 2”
minimum clearance at the top. A 1” minimum
clearance must be maintained to combustible
materials around the other sides.
All horizontal terminations must also comply with
the clearance specifications to adjacent
structures outlined in Figures 8 &11.
Horizontal sections require a 1/4" rise every 12"
of horizontal run.
NOTE: For each 90
0
elbow after 2, remove 5' from
the allowable horizontal run. For Canadian