CDV34 Gas Fireplace - Continental Fireplaces

12
when (H T ) > (V T )
Simple venting configuration
(only one 90° elbow)
See graph to determine the required
vertical rise V T for the required
horizontal run H T .
Example 4:
V1 H1 H2 HR HO HT BCDV34 & CDV34 HORIZONTAL TERMINATION
FIGURE 12
REQUIRED
VERTICAL
RISE IN
INCHES
V T
HORIZONTAL VENT RUN PLUS OFFSET IN FEET HT The shaded area within the lines represents acceptable
values for H and V .
T T
For vent configurations requiring more than one 90° elbow
the following formulas apply:
Formula 1: H < 4.2 V T T
Formula 2: H + V < 24.75 feet
T T
H1 H2 W415-0345 / L / 03.05.09
V 1
90°
FIGURE 13
= V = 6 ft
T
=3 ft
=5 ft
= H + H = 3 + 5 = 8 ft
1 2
= .03(two 90° elbows - 90°) = .03(180° - 90°) = 2.7 ft
= H + H = 8 + 2.7 = 10.7 ft
R O
H + V = 10.7 + 6 =16.7
T T
Formula 1: H < 4.2 V T T
4.2 V = 4.2 x 6 = 25.2 ft
T
10.7 < 25.2
Formula 2: H + V < 24.75 feet
T T
16.7 < 24.75
Since both formulas are met, this vent configuration is acceptable.
Example 5:
V1 V2 VT H1 H2 H3 H4 HR HO HT V 1
90°
H 1
=4 ft
= 1.5 ft
= V + V = 4 + 1.5 = 5.5 ft
1 2
=2 ft
=1 ft
=1 ft
= 1.5 ft
= H + H + H + H = 2 + 1 + 1 + 1. 5 = 5.5 ft
1 2 3 4
= .03(four 90° elbows - 90°) = .03(360° - 90°) = 8.1 ft
= H + H = 5.5 + 8.1 = 13.6 ft
R O
H + V = 13.6 + 5.5 = 19.1 ft
T T
Formula 1:H T < 4.2 V T
4.2 V T = 4.2 x 5.5 = 23.1 ft
13.6 < 23.1
Formula 2:H + V < 24.75 feet
T T
19.1 < 24.75
90°
H 2
V2 H3 FIGURE 14
H 4
Since both formulas are met, this vent configuration is acceptable.