A.O. Smith Water Heater All Air from Inside the Building, All Air from Outdoors

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12" MAXIMUM

 

 

CLOSET

 

___

OR

PERMANENT

OTHER

OPENINGS

TO

CONFINED

THE OUTSIDE

OR

SPACE

ADDITIONAL

 

 

ROOMS WITHIN

THE BUILDING

!

r-3

I

12" MAXIMUM J

FIGURE 4.

All Air from Inside the Building

When additional air is to be provided to the confined area from additional room(s) within the building, the total volume of the room(s) must be of sufficient size to properly provide the necessary amount of fresh air to the water heater

and other gas utilization equipment in the area. If you are unsure that the structure meets this requirement, contact your local gas utility company or other qualified agency for a safety inspection.

Each of the two openings shall have a minimum free area of 1 square inch per 1,000 BTUH of the total input rating of all gas utilization equipment in the confined area, but not less than 100 square inches (Figure 5).

CONFINED

SPACE

PERMANENT

OPENINGS

INCH/1000

BTUH

(MINIMUM

_100SQUARE. IN.)

FIGURE 5.

All Air from Outdoors

Outdoor fresh air can be provided to a confined area either directly or by the use of vertical and horizontal ducts. The

fresh air can be taken from the outdoors or from crawl or attic spaces that freely communicate with the outdoors, Attic or crawl spaces cannot be closed and must be properly ventilated to the outside,

Ductwork must be of the same cross-sectional area as the free area of the opening to which they connect, The minimum dimension of rectangular air ducts cannot be less than three inches,

The size of each of the two openings is determined by the method in which the air is to be provided. Refer to Table 4 to calculate the minimum free area for each opening.

Figures 6, 7, 8A and 8B are typical examples of each method.

Louvers and Grilles

In calculating free area for ventilation and combustion air supply openings, consideration must be given to the

blocking effect of protection louvers, grilles, and screens. These devices can reduce airflow, which in turn may require larger openings to achieve the required minimum free area. Screens must not be smaller than 1/4" mesh. If the free area through a particular design of louver or grille is known, it should be used in calculating the specified

free area of the opening. If the design and free area are not known, it can be assumed that most wood louvers will allow 20 - 25% of free area while metal louvers and grilles will allow 60 - 75% of free area.

Louvers and grilles must be locked open or interconnected with the equipment so that they are opened automatically during equipment operation.

Keep louvers and grilles clean and free of debris or other obstructions.

TABLE 4

Minimum Free Area of Permanent Openings for Ventilation and Combustion Air Supply - All Air from

Outdoors Only.

Based on total BTUH input rating for all utilizing equipment within the confined space.

 

 

Minimum Free

Area

 

 

Opening

Source

Per Opening (sq. in.)

Reference

Drawing

*Direct to outdoors

1 sq. in, per 4000

BTUH

Figure

6

Vertical

Ducts

1 sq. in, per 4000

BTUH

Figure

7

Horizontal

Ducts

1 sq. in, per 2000

BTUH

Figure

8

Single Opening

1 sq. in, per 3000

BTUH

Figure

8A

Example: A water heater with an input rating of 50,000 BTUH using horizontal ducts would require each opening to have a minimum free area of 25 square inches.

Minimum free area = 50,000 BTUH x 1 sq. in. / 2000 BTUH = 25 sq. in.

*These openings connect directly with the outdoors through a ventilated attic, a ventilated crawl space, or through an outside wall.

Consult the local codes of your area for specific ventilation and combustion air requirements.

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Contents Installer SmithWater Important Definitions Improper installation and use may result in property damage Fire or Explosion HarzardFire Hazard GET to Know Your Water Heater GAS Models Important Information About This Water Heater Consumer InformationConsumer Responsibilities Location Requirements Site LocationClearances and Accessibility Pmpey Damage HazardGas Pressure Testing Gas PressureGas Requirements Gas PipingLP Gas Only Explosion HazardUnconfined Space Confined SpaceCarbon Monoxide Warning RoomAll Air from Inside the Building All Air from OutdoorsLouvers and Grilles Draft Hood Installation PER OpenVent Connectors Vent Pipe SizeChimney Connection Piping Installation MA,NTA,N\Propey Damage Hazard Closed System/Thermal ExpansionTemperature and Pressure Relief Valve Explosion Harzard Temperature & Pressure Relief ValveRelief Valve and Pipe Insulation Some Models Combination Space Heating/Potable Water SystemSolar Installation AIRVent Pipe System Water System PipingGas Supply and Piping Lighting Instructions BeforeForyoursafetyreadbeforelighting Checking the DraftToturnoffgastoappliance Burn HazardWater Temperature Regulation Burner FlamesEmergency Shut Down White Rodgers ValvesOperational Conditions Property Damage HazardCondensation Routine Preventive Maintenance Anode Rod/Water OdorDraining and Flushing Replacement Parts Removing the Burner from the Manifold/ Burner AssemblyManualrelief ThermalReplacing the Pilot/Pilot Tube Assembly Replacing the ThermocoupleReplacing the Manifold/Burner Assembly External Inspection & Cleaning of the Base-Ring FilterCleaning the Combustion Chamber and Flame-arrestor Testing the Igniter System Piezoelectric Igniter SystemRemoving and Replacing the Gas Control Valve/Thermostat FVlR System Operational Checklist Possible CausesProblem Thermostat set too highYES Repair Parts List Listed Parts Kits and Illustrations Page Limited Residential GAS Warranty Conditions and ExceptionsClaim Procedure Installation InformationLimitation on Implied Warranties Disclaimers

Water Heater specifications

A.O. Smith is a renowned name in the water heating industry, celebrated for its commitment to innovation, quality, and efficiency. Their water heaters are designed to cater to a wide variety of needs, making them suitable for both residential and commercial applications. The main features of A.O. Smith water heaters are tailored to ensure optimal performance, convenience, and reliability.

One of the standout characteristics of A.O. Smith water heaters is their impressive energy efficiency. Many models are equipped with advanced insulation technologies that minimize heat loss, allowing users to save on energy bills while ensuring a consistent supply of hot water. The introduction of high-efficiency gas burners and electric heating elements enhances their energy utilization, which is reflected in their excellent Energy Factor ratings.

A.O. Smith also incorporates smart technology in its water heaters. Many models feature integrated Wi-Fi connectivity, allowing homeowners to monitor and control their water heating system remotely via a smartphone app. This capability enables users to adjust temperature settings, receive maintenance alerts, and track energy usage, providing a new level of convenience and control.

Durability is another hallmark of A.O. Smith water heaters. Constructed with high-quality materials, these units often feature a glass-lined tank that enhances corrosion resistance. Additionally, many models are designed with a robust anode rod that helps prevent rusting, extending the lifespan of the heater and ensuring dependable service for years to come.

Safety features are also a priority for A.O. Smith. Many water heaters come equipped with advanced safety mechanisms, such as automatic shut-off valves, temperature controls, and flame failure detection systems, ensuring safe operation and reducing the risk of accidents.

Different models are available to suit varying space requirements and preferences. A.O. Smith produces traditional tank water heaters as well as modern tankless options, which provide endless hot water on demand, making them ideal for homes needing high hot water consumption. Their versatility guarantees that customers can find the perfect solution tailored to their specific needs.

In conclusion, A.O. Smith water heaters represent a blend of innovation, efficiency, durability, and safety. With various models available that cater to different heating needs and preferences, A.O. Smith continues to remain a trusted choice for consumers seeking reliable hot water solutions.