Heatilator NA36 Installation & Operating Instructions Manual page 24

For installations utilizing an ST375 square termination cap the last chimney section must not be more than 4½”
below the chase top. See Figure 24.
For installation utilizing a TS345/TS345P Square Termination Cap, the uppermost chimney section must not be
more than 3” below the chase top. See Figure 25.
Attach the chase top (CT35) to the top of the chase.
Install the termination cap, following the instructions provided with it.
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NA SERIES INSTALLATION INSTRUCTIONS
WARNING!
WARNING!
17789 Rev H 07/03