FIGURE 6 -ILLUSTRATION OF MINIMUM CLEARANCES TO COMBUSTIBLES

UNCONFINEDSPACE

In buildings of conventional frame, brick, or stone construction, unconfined spaces may provide adequate air for combustion, ventilation and draft hood dilution.

If the unconfined space is within a building of tight construction (buildings using the following construction: weather stripping, heavy insulation, caulking, vapor barrier, etc.), air for combustion, ventilation and draft hood dilution must be obtained from outdoors. The installation instructions for confined spaces in tightly constructed buildings must be followed to ensure adequate air supply.

CONFINEDSPACE

When drawing combustion and dilution air from inside a conventionally constructed building to a confined space, such a space shall be provided with two permanent openings, ONE IN OR WITHIN 12 INCHES OF THE ENCLOSURE TOP AND ONE IN OR WITHIN 12 INCHES OF THE ENCLOSURE BOTTOM. Each opening shall have a free area of at least one square inch per 1000 Btuh of the total input of all appliances in the enclosure, but not less than 100 square inches.

If the confined space is within a building of tight construction, air for combustion, ventilation, must be obtained from outdoors. When directly communicating with the outdoors or communicating with the outdoors through vertical ducts, two permanent openings, located in the above manner, shall be provided. Each opening shall have a free area of not less than one square inch per 4000 Btuh of the total input of all appliances in the enclosure. If horizontal ducts are used, each opening shall have a free area of not less than one square inch per 2000 Btuh of the total input of all appliances in the enclosure.

If any part of the vent system are exposed to ambient temperatures below 40°F (4°C) it must be insulated to prevent condensation.

The following steps shall be followed with each appliance connected to the venting system placed in operation, while any other appliances connected to the venting system are not in operation.

1.Seal any unused openings in the venting system.

2.Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.

3.So far as is practical, close all building doors and windows and all doors between the space in which the water heater(s) connected to the venting system are located and other spaces of the building. Turn on all appliances not connected to the venting system. Turn on all exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed. Close fireplace dampers.

4.Follow the lighting instruction. Place the water heater being inspected in operation. Adjust thermostat so appliance shall operate continuously.

5.After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous conditions of use.

6.If improper venting is observed during any of the above tests, the venting system must be corrected.

WARNING

FAILURE TO CORRECT BACK DRAFTS MAY CAUSE AIR CONTAMINATIONAND UNSAFE CONDITIONS.

VENTING

WARNING

THE INSTRUCTIONS IN THIS SECTION ON VENTING MUST BE FOLLOWED TO AVOID CHOKED COMBUSTION OR RECIRCULATION OF FLUE GASES. SUCH CONDITIONS CAUSE SOOTING OR RISKS OF FIRE AND ASPHYXIATION.

Heater must be protected from freezing downdrafts.

Remove all soot or other obstructions from the chimney that will retard a free draft.

Type B venting is recommended with these heaters.

This water heater must be vented in compliance with all local codes, the current revision of the National Fuel Gas Code (ANSI-Z223.1) and with the Category I Venting Tables.

•If the back draft cannot be corrected by the normal method or if a suitable draft cannot be obtained, a blower type flue gas exhauster must be employed to assure proper venting and correct combustion.

•Do not connect the heater to a common vent or chimney with solid fuel burning equipment. This practice is prohibited by many local building codes as is the practice of venting gas fired equipment to the duct work of ventilation systems.

FIGURE7

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A.O. Smith SBD 30 150 warranty Venting, Confinedspace
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SBD 30 150 specifications

The A.O. Smith SBD 30 150 is a high-efficiency water heater designed to meet the hot water needs of residential applications. Renowned for its reliability and performance, this model exemplifies A.O. Smith's commitment to innovative technology and energy efficiency.

One of the standout features of the A.O. Smith SBD 30 150 is its capacity. With a 30-gallon tank, it is ideally suited for small to medium-sized households. This makes it an excellent choice for families or individuals who require a steady supply of hot water for various applications like bathing, cooking, and cleaning.

The SBD 30 150 is equipped with a powerful, efficient heating element that delivers quick recovery rates. This means that users can expect hot water when they need it without long waiting times. The advanced insulation technology employed in its design reduces heat loss, allowing the unit to maintain a steady temperature and operate at optimal efficiency.

Energy efficiency is a key characteristic of the A.O. Smith SBD series. It features Energy Star certification, demonstrating its ability to provide hot water while minimizing energy consumption. Users can enjoy the dual benefit of reduced energy bills and a smaller carbon footprint. This model is particularly appealing to eco-conscious consumers looking to integrate green technologies into their homes.

In terms of durability, the SBD 30 150 is built with high-quality materials designed to withstand the test of time. Its glass-lined tank provides excellent corrosion resistance, which is essential for extending the lifespan of the unit. Additionally, the heater includes a durable anode rod, which serves to protect the tank from galvanic corrosion, further enhancing its longevity.

Convenience features are also notable in this model. It comes with a thermostat that allows for easy temperature control, enabling users to set the preferred hot water temperature without hassle. Moreover, the compact design of the SBD 30 150 makes it easy to install in various settings, whether it’s a small utility area or a basement.

In conclusion, the A.O. Smith SBD 30 150 water heater stands out as a practical and efficient solution for anyone in need of reliable hot water. With its impressive features, energy-saving technologies, and robust design, it is a smart investment for long-lasting performance and comfort in everyday life.
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