Download ! WARNING - Napoleon® Products

17
(HT) > (VT)
Simple venting configurations.
See graph to determine the required vertical rise VT for the
required horizontal run HT.
20 (6.1)
19 (5.8)
REQUIRED
VERTICAL RISE
IN FEET
10 (3.1)
(METERS) VT
3 (0.9)
0
5
(1.5)
10
(3.1)
15
(4.6)
25
(7.6)
20
(6.1)
30
(9.1)
HORIZONTAL VENT RUN PLUS OFFSET IN FEET (METERS)HT
The shaded area within the lines represents acceptable
values for HT and VT
For vent configurations requiring more than one 45° and one 90° elbow, the following formulas apply:
Formula 1: HT < 3VT
Formula 2: HT + VT < 40 feet (12.2m)
Example:
V1 = 1 FT (0.3m)
V2 = 1.5 FT (0.5m)
VT = V1 + V2 = 1 FT (0.3m)+ 1.5 FT (0.5m)= 2.5 FT (0.8m)
H1 = 6 FT (1.8m)
H2 = 2 FT (0.6m)
HR = H1 + H2 = 6FT (1.8m) + 2FT (0.6m) = 8 FT (2.4m)
HO = .03 (one 45° + three 90° elbows - 135°)
= .03 (45 + 270 - 135°) = 5.4 FT (1.6m)
HT = HR + HO = 8FT (2.4m) + 5.4FT (1.6m) = 13.4FT (4.1m)
HT + VT = 13.4FT (4.1m)+ 2.5FT (0.8m) = 15.9FT (4.8m)
V2
90°
H2
45°
H1
90°
V1
90°
Formula 1:
HT < 3VT
3VT = 3FT (0.9m) x 2.5FT(0.8m) = 7.5FT (2.3m)
13.4 FT (4.1m) > 7.5 FT (2.3m)
Since this formula is not met, this vent configuration is unacceptable.
Formula 2:
HT + VT < 40 FT (12.2m)
15.9FT (4.8m) < 40FT (12.2m)
Since only formula 2 is met, this vent configuration in unacceptable and a new fireplace location or vent
configuration will need to be established to satisfy both formulas.
90°
Example:
H2
V1 = 1.5 FT (0.5m)
H3
V2 = 8 FT (2.4m)
V1
45°
45°
VT = V1 + V2 = 1.5 FT (0.5m) + 8 FT (2.4m) = 9.5 FT (2.9m)
H1
H1 = 1 FT (0.3m)
H2 = 1 FT (0.3m)
90°
H3 = 10.75 FT (3.3m)
HR = H1 + H2 + H3 = 1FT(0.3m) + 1FT(0.3m) + 10.75FT(3.3m) = 12.75FT(3.9m)
HO = .03 (three 90° elbows + two 45° elbows - 135°)
= .03 (270 + 90 - 135°) = 6.75 FT (2.1m)
HT = HR + HO = 12.75 FT (3.9m) + 6.75 FT (2.1m) = 19.5 FT (5.9m)
HT + VT = 19.5FT (5.9m) + 9.5FT (2.9m) = 29 FT (8.8m)
V2
90°
Formula 1:
HT < 3VT
3VT = 3 x 9.5 = 28.5 FT (8.7m)
19.5 FT (5.9m) < 28.5 (8.7m)
Formula 2:
HT + VT < 40 FT (12.2m)
29 FT (8.8m) < 40 FT (12.2m)
Since both formulas are met, this vent configuration is acceptable.
18.3_2B
W415-0777 / E / 08.26.13
EN