Figure 7. The water heater should have clearances of at least 1 inch (25 mm) from the sides and back and 6 inches (150 mm) from the front of the appliance. The opening should directly communicate with the outdoors or should communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors and should have a minimum free area of the following:

1.1 square inch per 3000 Btu/hr (700 mm2 per kW) of the total input rating of all appliances located in the enclosure, and

2.Not less than the sum of the areas of all vent connectors in space.

OUTDOOR AIR THROUGH TWO HORIZONTAL DUCTS

FIGURE 8.

Confined space should be provided with two permanent horizontal ducts, one commencing within 12 inches (300 mm) of top and one commencing within 12 inches (300 mm) of bottom of enclosure. Horizontal ducts should communicate directly with outdoors. See Figure 8.

Each duct opening should have a minimum free area of 1 square inch per 2,000 Btu/hr (1100 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure.

When ducts are used, they should be of the same cross sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts should be not less than 3 inches.

OUTDOOR AIR THROUGH TWO VERTICAL DUCTS

The illustrations shown in this section of the manual are a reference for the openings that provide fresh air into confined spaces only.

Do not refer to these illustrations for the purpose of vent installation. See Installation of Vent System on pages 18-27 for complete venting installation instructions.

FIGURE 9.

The confined space should be provided with two permanent vertical ducts, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the

enclosure. The vertical ducts should communicate directly with the outdoors. See Figure 9.

Each duct opening should have a minimum free area of 1 square inch

per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating of

all appliances installed in the enclosure.

When ducts are used, they should be of the same cross sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts should be not less than 3 inches.

AIR FROM OTHER INDOOR SPACES

FIGURE 9A.

The confined space should be provided with two permanent

openings, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of

the enclosure. See Figure 9A.

Each opening should communicate directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an Unconfined Space.

Each opening should have a minimum free area of 1 square inch per

1,000 Btu/hr (1100 mm2 per kW) of the aggregate input rating of all

appliances installed in the enclosure. Each opening should not be

less than 100 square inches (645 cm2).

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State Industries 197425-004 Outdoor AIR Through TWO Horizontal Ducts, Outdoor AIR Through TWO Vertical Ducts
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197425-004 specifications

State Industries Model 197425-004 is a noteworthy water heater designed to cater to the needs of both residential and commercial applications. Known for its efficiency and reliability, this model offers a range of features that enhance its appeal to users looking for an effective water heating solution.

One of the primary characteristics of the 197425-004 is its tankless design, which allows for an endless supply of hot water. Unlike traditional water heaters that store hot water in a tank, this model heats water on demand, conserving both energy and space. This is particularly advantageous for households or businesses with fluctuating hot water needs, as it eliminates the risk of running out of hot water during peak usage times.

The technology behind the State Industries 197425-004 incorporates advanced insulation and heat exchange systems, which significantly improve energy efficiency. With a high energy factor rating, this unit minimizes energy consumption, thus reducing utility bills and environmental impact. Users can expect lower operating costs without sacrificing performance, making it a cost-effective option in the long run.

Another defining feature of the 197425-004 is its durable construction. Built with high-quality materials, including corrosion-resistant components, this water heater is designed for longevity. The model also includes a user-friendly digital thermostat, enabling precise temperature control and easy monitoring. This ensures that users can customize their hot water needs according to individual preferences.

In addition to its performance and efficiency, the State Industries 197425-004 prioritizes safety. It is equipped with multiple safety features such as thermal overload protection and precise temperature regulation, reducing the risk of accidents.

Installation is made convenient with this model, as it is compatible with various plumbing systems and does not require complex modifications. Its compact size allows for flexible installation options, whether it is placed indoors or outdoors, depending on user preferences.

In summary, the State Industries 197425-004 represents a perfect blend of cutting-edge technology, energy efficiency, and durability. With its tankless heating system, impressive energy factor, and safety features, it continues to stand out as an excellent choice for reliable hot water solutions in diverse settings.
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