Delta PG PLUS-25 Operations Instructions download pdf (Page 34)

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Venting and Combustion Air Installation

Category IV Vent Termination Clearances

Maintain the following clearances to the vent

termination:

- At least 6 feet from adjacent walls

- No closer than 5 feet below roof over-

hangs

- At least 7 feet above any public walk-

ways

- At least 3 feet above any forced air

intake (does not include the combustion

air inlet) within 10 feet.

- The vent termination must be at least 4

feet from any electric meters, gas

meter-regulators, relief valves or other

equipment. Never terminate the vent

above or below any of these items with-

in 4 feet.

- Vent must terminate at least 12 inches

above grade or common snow line.

In those applications in which the vent

termination is below the projected snow

line. The installer has 2 options. In the

first option the vent system can be rout-

ed vertically through an insulated chase

or “riser box” and then terminated hori-

zontally. The chase is to be constructed

and insulated by the contractor, main-

taining clearances for vertical and hori-

zontal enclosures. In the second option

the installer can use the horizontal con-

centric snorket kit, see Fig. 22B page 34.

If the venting application is a horizontal

direct vent:

- Must maintain 12-inch clearances

below and horizontally from doors and

windows. See dimension A Fig. 17.

If the venting application is a horizontal

non-direct vent:

NOTICE

Fig.17: Termination of Vent system

Dimension A

Direct Vent - 12 inches

Non-Direct Vent - 4 feet

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 75 76

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