Chase Top - Heatilator ST42A Owner's Manual

Install the Chimney Air Kit (required in Canada):
When installing the chimney air kit, follow the instructions
provided with this accessory.
B. Chase Top
A metal chase top is required to seal the top of the chase
around the chimney pipe. The top should include a turn-
down and drip edge to prevent water from seeping into the
chase. Provide a 1/8 in. (3 mm) gap around the fl ue pipe
and slope the top downward away from the penetration. See
Figure 6.4.
• All seams must be caulked to prevent leaks.
• A chase installation must use a chase top. Chase tops
are available from your Heatilator dealer or may be fi eld
constructed.
• Attach the chase top to the top of the chase.
Caulk
Figure 6.4 Chase Top Construction
Termination Cap
2 in. (51 mm) Collar
on Chase Top
Storm Collar
Slope Downward
Turn-down
Drip Edge
Chase
(Chimney)
.018 (26 ga) min.
Galvanized

Chase Top

Heatilator • ST42A • 35038 Rev G • 02/05 21