8

TOP EXIT VERTICAL TERMINATION

when (HT) < (VT)

See graph to determine the required vertical rise VT for the required horizontal run HT.

FIGURE 9

REQUIRED VERTICAL

RISE IN FEET

VT

HORIZONTAL VENT RUN PLUS OFFSET IN

FEET HT

The shaded area within the lines represents ac- ceptable values for HT and VT .

For vent confi gurations requiring more than zero 90° elbow (top exit) or one 90° elbow (rear exit), the following formulas apply:

Formula 1: HT < VT

Formula 2: HT + VT < 40 feet

TOP VERTICAL TERMINATION

when (HT) > (VT)

Simple venting confi gurations

FIGURE 10

90°

90°

V3

 

V

V H2

 

1

H1

 

2

 

 

9

90°

 

 

See graph to determine the required vertical rise VT for the required horizontal run HT.

MAXIMUM

VERTICAL

RISE IN

FEET

VT

HORIZONTAL VENT RUN PLUS OFFSET IN FEET HT

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

For vent confi gurations requiring more than two 90° elbow (top exit) or one 90° elbow (rear exit), the following formulas apply:

Formula 1: HT < 3VT

Formula 2: HT + VT < 40 feet

W415-0583 / B / 05.23.07

FIGURE 11

Example 7:

V1

=2 ft

V2

=1 ft

V3

=1.5 ft

VT

= V1 + V2 + V3 = 2 + 1 + 1.5 = 4.5 ft

H1

=6 ft

H2

=2 ft

HR

= H1 + H2 = 6 + 2 = 8 ft

HO

= .03(four 90° elbows - 90°)

 

= .03(90 + 90 + 90 + 90 - 90) = 8.1 ft

HT

=HR + HO = 8 + 8.1 = 16.1 ft

HT + VT

= 16.1 + 4.5 = 20.6 ft

Formula 1: HT < 3VT

3VT = 3 x 4.5 = 13.5 ft

16.1 > 13.5

Since this formula is not met, this vent configuration is unacceptable.

Formula 2: HT + VT < 40 feet 20.6 < 40

Since only formula 2 is met, this vent confi guration is unacceptable and a new fi replace location or vent confi guration will need to be established to satisfy both formulas.

Page 8
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Napoleon Fireplaces GD82PT-T, GD82NT-T manual TOP Exit Vertical Termination, TOP Vertical Termination

GD82NT-T, GD82PT-T specifications

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