8
VERTICAL TERMINATION
when (HT) < (VT)
Simple venting configurations
FIGURE 9
See graph to determine the required vertical rise VT for the required horizontal run HT.
| 40 |
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REQUIRED |
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VERTICAL RISE | 30 |
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IN FEET |
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VT |
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| 20 |
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| 10 |
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3 |
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| 0 | 5 | 10 | 15 | 2 | 0 |
HORIZONTAL VENT RUN PLUS OFFSET IN FEET HT
The shaded area within the lines represents acceptable values for HT and VT .
For vent configurations requiring more than zero 90° elbow (top exit) or one 90° elbow (rear exit), the following formu- las apply:
Formula 1: HT < VT
Formula 2: HT + VT < 40 feet
