Napoleon Fireplaces GD19N, GD19P manual Top Exit / Horizontal Termination

11

TOP EXIT / HORIZONTAL TERMINATION

		(HT) > (VT)					Example 2:
					FIGURE 9		V1	= VT	= 6 ft
							H1	= 3 ft
							H2	= 5 ft
							HR	= H1	+ H2 = 3 + 5 = 8 ft
Simple venting configuration							HO	= .03(two 90° elbows - 90°) = .03(180° - 90°) = 2.7 ft
							HT	= HR + HO = 8 + 2.7 = 10.7 ft
(only one 90° elbow)
							HT	+ VT= 10.7 + 6 =16.7
							Formula 1:		HT < 4.2 VT
									4.2 VT = 4.2 x 6 = 25.2 ft
									10.7 < 25.2
							Formula 2:		HT + VT < 24.75 feet
									16.7 < 24.75
							Since both formulas are met, this vent configuration is
See graph to determine the required vertical rise VT for the							acceptable.
required horizontal run HT.							Example 3:
REQUIRED	150
	140
VERTICAL										90°
RISE IN	130
INCHES VT	120								H1	H4
	110									V2
	100									H3
								V1	90°	H2
	90									FIGURE 11
	80
	70
	60
	50
	40						V1	= 4 ft
	30
							V2	= 1.5 ft
	20						VT	= V1 + V2 = 4 + 1.5 = 5.5 ft
	10						H1	= 2 ft
		0	5	10	15	20	H2	= 1 ft
							H3	= 1 ft
HORIZONTAL VENT RUN PLUS OFFSET IN FEET HT							H4	= 1.5 ft
							HR	= H1 + H2 + H3 + H4		= 2 + 1 + 1 + 1. 5 = 5.5 ft
The shaded area within the lines represents acceptable							HO	= .03(four 90° elbows - 90°) = .03(360° - 90°) = 8.1 ft
values for HT and VT .							HT	= HR + HO = 5.5 + 8.1 = 13.6 ft
							HT	+ VT = 13.6 + 5.5 = 19.1 ft
For vent configurations requiring more than one 90° elbow							Formula 1: HT < 4.2 VT
the following formulas apply:									4.2 VT = 4.2 x 5.5 = 23.1 ft
Formula 1: HT		< 4.2 VT							13.6 < 23.1
Formula 2: HT		+ VT < 24.75 feet					Formula 2: HT + VT < 24.75 feet
			H1						19.1 < 24.75
FIGURE10					H2		Since both formulas are met, this vent configuration is
							acceptable.
	V1		90°
										W415-0612 / C / 01.25.08