Napoleon Fireplaces GDS25N GDS25P manual Vertical Termination, Ht Vt

13

VERTICAL TERMINATION

when (HT) < (VT)	V2	=10 ft
See graph to determine the required vertical rise VT for the	VT	= V1 + V2 = 5 + 10 = 15 ft
FIGURE 9		FIGURE10	V2

45°

45°

required horizontal run HT.

For vent configurations requiring more than one 45º and one

90° H2 90°

V1

H1 90°

REQUIRED VERTICAL RISE IN FEET (VT)

150					H1	=3 ft
140
130					H2	=2.5 ft
120					HR	= H1 + H2 = 3 + 2.5 = 5.5 ft
110
					HO	= .03(one 45º elbow + three 90º elbows - 135º)
100
						= .03(45+90+90+90-135)=5.4
90
					HT	=HR + HO = 5.5 + 5.4 = 10.9 ft
80
70					HT + VT	= 10.9 + 15 = 25.9 ft
60					Formula 1:		HT < VT
50
40							10.9 < 15
30					Formula 2:		HT + VT < 40 feet
20							25.9 < 40
10					Since both formulas are met, this vent configuration is
0	5	10	15	20
					acceptable.

HORIZONTAL VENT RUN

PLUS OFFSETS IN FEET

The shaded area within the lines represents acceptable values for HT and VT.

90° elbow , the following formulas apply:

Formula 1: HT < VT
Formula 2: HT		+ VT	< 40 feet
Example 3:
V1	=5 ft

W415-0547 / B / 05.08.06