Napoleon Fireplaces BGDV42N, BGDV42P manual Horizontal Termination, Formula 1 HT 4.2 VT

10

HORIZONTAL TERMINATION

when (HT) > (VT)	Example 2:
Simple venting configuration (only one 45º and 90° elbow)

See graph to determine the re-				90°
	FIGURE 7	FIGURE 8		90°
quired vertical rise VT for the re-
				H4
quired horizontal run HT.		45°	H1	H3 V2
				H2

V1

90°

REQUIRED

VERTICAL

RISE IN

INCHES (VT)

HORIZONTAL VENT RUN PLUS OFFSETS IN FEET (HT)

V1	= 4 ft
V2	= 1.5 ft
VT	= V1 + V2 = 4 ft + 1.5 ft = 5.5 ft
H1	= 2 ft
H2	= 1 ft
H3	= 1 ft
H4	= 1.5 ft
HR	= H1 + H2 + H3 + H4 = 2 + 1 + 1 + 1. 5 = 5.5 ft
HO	= .03(one 45º elbow + three 90º elbow -135º)
	=.03(315-135)=5.4ft
HT	= HR + HO = 5.5 +5.4 = 10.9 ft

HT + VT = 10.9 + 5.5 = 16.4 ft

Formula 1: HT < 4.2 VT

4.2VT = 4.2 x 5.5 = 23.1 ft

10.9< 16.8

Formula 2: HT + VT < 24.75 feet

16.4 < 24.75

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

For vent configurations requiring more than one 45º and 90° elbow the following formulas apply:

Formula 1: HT < 4.2 VT

Formula 2: HT + VT < 24.75 feet

Since both formulas are met, this vent configuration is ac- ceptable.

W415-0381 / C / 05.13.04