15
BGD36CF(G) TOP OR REAR EXIT VERTICAL TERMINATION
Example 8:
90° | 45° | V2 | |
V H2 |
| ||
H3 | 90° | ||
1 | |||
H1 |
|
| |
90° |
| FIGURE 33 |
V1 = 1.5 ft
V2 = 5 ft
VT = V1 + V2 = 1.5 + 5 = 6.5 ft H1 = 1 ft
H2 = 1 ft
H3 = 10.75 ft
HR = H1 + H2 + H3 = 1 + 1 + 10.75 = 12.75 ft
HO = .03 (three 90° elbows + one 45° elbow - 90°) = .03(90 + 90 + 90 + 45 - 90) = 6.75 ft
HT = HR + HO = 12.75 + 6.75 = 19.5 ft
HT + VT = 19.5 + 6.5 = 26 ft
Formula 1: HT < 3VT
3VT = 3 x 6.5 = 19.5 ft
19.5< 19.5
Formula 2: HT + VT < 40 feet
26 < 40
Since both formulas are met, this vent confi guration is accept- able.
