Vent Termination Clearances

These instructions should be used as a guide- line and do not supersede local codes in any way. Install vent according to local codes, these instructions, the current National Fuel Gas Code (ANSI-Z223.1) in the USA or the current standards of CAN/CGA-B149.1 and -B149.2 in Canada.

Terminate multiple vent terminations according to the installation codes listed above.

Terminate single vent caps relative to building components according to Figure 5.

Vertical Vent Termination Clearances

TERMINATION HEIGHTS FOR VENTS ABOVE FLAT OR SLOPED ROOFS

Horizontal Overhang

Horizontal Vent Termination Clearances

The horizontal vent termination must have a minimum of 3" (76 mm) clearance to any overhead combustible projection of 2 1/2" (64 mm) or less. For projections exceeding 2 1/2" (64 mm), see Figure 6. All horizontal terminations may be located as close as 6" (152mm) to any combustible exterior sidewall. This distance may be decreased to 2" (51mm) if the SV4.5HT-2 or SF4.5HT-2 termination is used and the exterior sidewall is non-combustible only. For additional vent location restrictions refer to Figure 7 on Page 8.

Horizontal Vent Termination Clearances

 

 

Combustible Projection

All horizontal terminations

 

2-1/2 inches or less in length

may be located as close

 

Combustible Projection

as 6” (152mm) to any

 

(non-combustible and

greater than 2-1/2 inches in length

combustible) exterior

 

 

 

sidewall. This distance

Ventilated

 

 

may be decreased to

Soffit

Unventilated

 

2” (51mm) for non-

 

Soffit

 

combustible exterior

 

 

 

sidewalls only, if the

 

 

 

SV4.5HT-2 or SF4.5HT-2

2 FT MIN.

Vent

Termination

Storm Collar

Flashing

2 FT

 

Vertical

MIN.

 

Wall

 

 

Lowest

Discharge

Opening

H*

X

12

Roof Pitch is X/12

 

3"

termination

 

(76 mm)

is used.

 

 

18"

12"

Termination Kit

 

(457 mm)

(305 mm)

 

Termination Kit

 

 

 

 

1 inch (25.4 mm) Minimum

 

 

 

 

 

 

 

 

 

Concentric

 

 

 

Clearance to Combustibles

*H = MINIMUM HEIGHT FROM ROOF TO

Vent Pipe

LOWEST DISCHARGE OPENING OF VENT

The vent / air intake termination clearances above the high side of an angled roof is as shown in the following chart:

Termination Heights For Vents Above Flat Or Sloped Roofs Ref. NFPA 54 / ANSI Z223.1, 7.6

Roof Pitch

* Feet

*Meters

 

 

 

Flat to 6/12

1.0

0.3

 

 

 

6/12 to 7/12

1.25

0.38

 

 

 

7/12 to 8/12

1.5

0.46

8/12 to 9/12

2.0

0.61

 

 

 

9/12 to 10/12

2.5

0.76

10/12 to 11/12

3.25

0.99

 

 

 

11/12 to 12/12

4.0

1.22

 

 

 

12/12 to 14/12

5.0

1.52

14/12 to 16/12

6.0

1.83

 

 

 

16/12 to 18/12

7.0

2.13

18/12 to 20/12

7.5

2.29

 

 

 

20/12 to 21/12

8.0

2.44

Figure 5

Note - See Figure 33 on Page 20 for the exterior wall recess allowances of the square horizontal termination.

Figure 6

Side Elevation View

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Page 6 Page 8
Page 7
Image 7
TOA Electronics SSDV-3328 Horizontal Vent Termination Clearances, Vertical Vent Termination Clearances
Page 6 Page 8

SSDV-3328 specifications

TOA Electronics SSDV-3328 is an advanced digital mixing amplifier designed to provide high-quality sound reinforcement for various applications, including commercial facilities, educational institutions, and public address systems. This versatile amplifier combines several key features and cutting-edge technologies to deliver exceptional audio performance and flexibility.

One of the standout characteristics of the SSDV-3328 is its robust power output. With a rating of 150 watts per channel, it is capable of driving a variety of speaker setups, ensuring that sound coverage is both powerful and consistent across large areas. This makes it an ideal choice for venues such as auditoriums, conference rooms, and exhibition halls.

The SSDV-3328 offers a unique blend of analog and digital input options, allowing seamless integration with various audio sources. It supports connectivity through balanced XLR inputs, RCA, and even digital input formats, providing users with the capabilities needed to connect microphones, musical instruments, and playback devices. This flexibility is invaluable for professionals who require adaptable solutions for different audio setups.

Equipped with TOA's advanced DSP (Digital Signal Processing) technology, the amplifier provides enhanced audio quality and control. Users can benefit from features such as graphic equalization, delay settings, and limiting, which enable precise tuning of the audio output to match the acoustics of any space. This capability ensures that the audio remains clear and intelligible, regardless of the complexity of the setup.

Another noteworthy feature of the SSDV-3328 is its built-in feedback suppression technology, designed to minimize feedback issues that can occur in live sound situations. This not only enhances the listening experience but also reduces the workload on sound technicians during events.

The design of the SSDV-3328 emphasizes reliability and ease of use. Its intuitive control panel includes well-organized knobs and switches for quick adjustments, while status indicators provide real-time feedback on system performance. Additionally, the lightweight and compact construction of the amplifier makes it easy to transport and install, meeting the demands of both permanent installations and portable setups.

In summary, TOA Electronics SSDV-3328 stands out in the realm of digital mixing amplifiers, offering powerful output, versatile connectivity, advanced DSP features, and a commitment to audio quality. Whether used in commercial spaces or live events, this amplifier is designed to deliver performance that meets the highest standards in sound reinforcement. Its thoughtful design and innovative technologies make it a reliable choice for audio professionals seeking a top-tier mixing amplifier.
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