E. Vent Diagrams

To replace the first starter elbow with two 45° elbows, refer to Figure 7.4. All other 90° elbows can be replaced with two 45° elbows.

General Rules:

SUBTRACT 3 ft. from the total H measurement for each 90° elbow installed horizontally.

SUBTRACT 1-1/2 ft. from the total H measurement for each 45° elbow installed horizontally.

A maximum of three 90° elbows (or six 45° elbows) may be used in any vent configuration. Some elbows may be installed horizontally. See Figure 7.9.

Elbows may be placed back to back anywhere in the system as long as the first 90° elbow is a starter elbow except as shown in Figure 7.4.

When penetrating a combustible wall, a wall shield firestop must be installed.

When penetrating a combustible ceiling, a ceiling firestop must be installed.

Horizontal runs of vent do not require vertical rise; horizontal runs may be level.

NOTICE: ICON direct vent appliances require the use of

avinyl soffit shield (ICONDV-VSS) whenever the unit is terminated horizontally in a home with vinyl siding.

1.Top Vent - Horizontal Termination

One Elbow

 

V1 min.

V1 max.

H1 max.

 

 

 

ft

m

ft

m

ft

m

 

 

 

1

0.30

-

-

25 in.

635 mm

Î

 

 

1.5

0.46

-

-

18

5.49

 

 

 

 

 

 

 

 

 

 

 

 

2

0.61

-

-

25

7.62

 

 

 

-

-

25

7.62

25

7.62

 

V1

H1

Figure 7.3

Heatilator • ICON DV-IDV Series • 4042-575 • Rev K • 11/08

23

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Hearth and Home Technologies IDV4833IT, IDV6247ILT, IDV6247IT, IDV6247IH Vent Diagrams, Top Vent Horizontal Termination

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