Out of production – LAARS Mighty Max HH (Sizes 320M - 400M) - Installation, Operation and Maintenance Instructions User Manual

Page 14

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LAARS Heating Systems

4.

Routing vent pipe through spaces which, except

for the terminal, remain above 60°F (16°C)

during heater operation.

2.12.4 Side Wall Vent Terminal
The side wall vent hood must be used when the

heater is vented through a side wall. It provides a

means of installing vent piping through the building

wall, and must be located in accordance with ANSI

Z223.1/NFPA 54 and applicable local codes. In

Canada the installation must be in accordance with

CSA B149.1 and local applicable codes (see Figure

10). Consider the following when installing the

terminal:
1.

Locate the vent terminal so that it will not be

damaged by pedestrians and other traffic, and so

the discharge is not objectionable. The National

Fuel Gas Code requires a through-wall vent

terminal be at least 7 feet (2.1m) above grade if

located at a public walkway.

2.

Locate the vent terminal so that vent gases

cannot be drawn into air conditioning system

inlets. The National Fuel Gas Code requires that

it be at least 6 feet (1.8m) above any such inlet

that is within 10 feet (3.0m).

3.

Locate the vent terminal so that vent gases

cannot enter the building through doors,

windows, gravity inlets or other openings. The

National Fuel Gas Code requires that it be

located at least 4 feet (1.2m) below, 4 feet (1.2m)

horizontally from, or 3 feet (0.9m) above such

openings.

4.

Locate the vent terminal so that it cannot be

blocked by snow. The National Fuel Gas code

requires that it be at least 12 inches (305mm)

above grade, but the installer may determine it

should be higher depending on local conditions.

5.

Locate the terminal so the vent exhaust does not

settle on building surfaces and other nearby

objects. Vent products may damage such

surfaces or objects. But the actual construction of

the vent terminal and the flow of vent products

must not be altered.

6.

Locate the terminal at least 6 feet (1.8m)

horizontally from any gas or electric metering,

regulating, or relief equipment, or building

opening.

Figure 10. Building Exterior.

Dimensions shown in feet (m).

Vent Hood

7 (2.1) Minimum

Above Public

Walkway

Vent Hood

Vent Hood

1 (0.3) Above Grade

4 (1.2)

Minimum

Vent Hood Must Be

Mounted 4 (1.2)

Minimum Below Windows

3 (0.9m) Minimum

Vent Hood

4 (1.2)

Minimum

6 (1.8) Above Any
Outside Air Intake

Within 10 (3.0)

Vent

Hood

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