For 4" Venting, the maximum equivalent feet of pipe allowed is 160 feet (48.8 m). This does not include the Vent Termination (supplied locally) for the water heater. For the 4" venting, one 90° elbow is approximately equal to 8 feet (2.4 m). One 45° elbow is approximately equal to 4 feet (1.2 m). It is recommended that at least 2 feet (0.6 m) of spacing be used in between all 45° elbows and all 90°elbows.

55,000 and 62,500 BTU Units:

For 2" Venting, the maximum equivalent feet of pipe allowed is 35 feet (10.6 m). This does not include the supplied Vent Termination for the water heater. For the 2" venting, one 90° elbow is approximately equal to 5 feet (1.5 m). One 45° elbow is approximately equal to 2.5 feet (0.8 m). It is recommended that at least 2 feet (0.6 m) of spacing be used in between all 45° elbows and all 90°elbows.

For 3" Venting, the maximum equivalent feet of pipe allowed is 80 feet (24.4 m). This does not include the Vent Termination (supplied locally) for the water heater. For the 3" venting, one 90° elbow is approximately equal to 5 feet (1.5 m). One 45° elbow is approximately equal to 2.5 feet (0.8 m). It is recommended that at least 2 feet (0.6 m) of spacing be used in between all 45° elbows and all 90°elbows.

For 4" Venting, the maximum equivalent feet of pipe allowed is 120 feet (36.6 m). This does not include the Vent Termination (supplied locally) for the water heater. For the 4" venting, one 90° elbow is approximately equal to 8 feet (2.4 m). One 45° elbow is approximately equal to 4 feet (1.2 m). It is recommended that at least 2 feet (0.6 m) of spacing be used in between all 45° elbows and all 90°elbows.

VENTING

The vent system must terminate so that proper clearances are maintained as cited in local codes or the current edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, 7.3.4e and 7.8a,b, as follows:

1.The exit terminals of a mechanical vent system shall be not less than 7 feet (2.13 m) above grade when located adjacent to public walkways, see Figure 16.

2.A venting system shall terminate at least 3 feet (0.91 m) above any forced air inlet located within 10 feet (3.1 m), see Figure 16.

3.The venting system shall terminate at least 4 feet (1.2 m) below, 4 feet (1.2 m) horizontally from or, 1 foot (0.31 m) above any door, window or gravity air inlet into any building.

The manufacturer also recommends that the vent termination should not be installed closer than 3 feet (0.91 m) from an inside corner of an L shaped structure and not be less than 1 foot (0.31 m) above grade.

The vent shall terminate a minimum of 12'' (30.5 cm) above expected snowfall level to prevent blockage of vent termination, see Figure 16.

4.In cold climates, it is recommended that vent termination not be mounted directly above or within 3 feet (0.91 m) horizontally from an oil tank vent or gas meter to avoid potential freeze-up from condensation, see Figure 16..

Plan the vent system layout so that proper clearances are maintained from plumbing and wiring.

Vent pipes serving power vented appliances are classified by building codes as “vent connectors”. Required clearances from combustible materials must be provided in accordance with information in this manual under LOCATION OF HEATER and VENTTERMINAL INSTALLATIONS, and with the National Fuel Gas Code and local codes.

VENT TERMINAL INSTALLATION

1.After the point of termination has been determined, use the cover plate as a template to mark the hole for the vent pipe to insert through the wall. BEWARE OF CONCEALED WIRING AND PIPING INSIDE OF WALL.

2.If the Vent Terminal is being installed on the outside of a finished wall, it may be easier to mark both the inside and outside wall. Align the holes by drilling a hole through the center of the template from the inside through to the outside. The template can now be positioned on the outside wall using the drilled hole as a centering point for the template.

3.A) MASONRY SIDE WALLS

Chisel an opening approximately one half inch larger than the marked circle.

B) WOODEN SIDE WALLS

Drill a pilot hole approximately one quarter inch outside of the marked circle. This pilot hole is used as a starting point for a saws-all or sabre saw blade. Cut around the marked circle staying approximately one quarter inch outside of the line. (This will allow the vent pipe to easily slide through the opening. The resulting gap will be covered up by the vent terminal cover plates.) Repeat this step on inside wall if necessary.

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A.O. Smith 185363-001 instruction manual Venting, Vent Terminal Installation, Masonry Side Walls, Wooden Side Walls
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185363-001 specifications

A.O. Smith is renowned for producing high-quality water heating solutions, and the model 185363-001 stands as a testament to the company’s commitment to innovation and efficiency. This water heater is designed to provide reliable hot water for residential and commercial applications, ensuring that users enjoy consistent performance throughout its lifespan.

One of the standout features of the A.O. Smith 185363-001 is its impressive energy efficiency. The unit is built with advanced insulation that minimizes heat loss, thus allowing it to achieve a higher Energy Factor (EF) rating. This efficiency not only contributes to reduced energy bills but also aligns with modern environmental standards, making it a responsible choice for eco-conscious consumers.

The 185363-001 model utilizes a robust tank design that ensures durability and optimal performance. Made from high-grade materials, the tank is resistant to corrosion and wear, extending the heater's lifecycle. Additionally, the unit's glass-lined interior offers added protection against rust and mineral buildup, promoting effective heat transfer and consistent hot water supply.

In terms of capacity, the A.O. Smith 185363-001 is designed to meet the demands of various households. It comes in multiple sizes, catering to different needs, whether for a smaller apartment or a larger family home. This versatility makes it a popular option for installers and homeowners alike.

The water heater is also equipped with advanced safety features, including a temperature and pressure relief valve, which prevents potential hazards by protecting the tank from excessive heat or pressure. Furthermore, the control system includes an adjustable thermostat, allowing users to set their preferred water temperature efficiently.

Another important characteristic of the A.O. Smith 185363-001 is its user-friendly design. The unit is straightforward to operate, which simplifies maintenance and reduces downtime. For technicians, the heater features a modular design that facilitates servicing and replacement of components, ensuring quick repairs when needed.

Overall, the A.O. Smith 185363-001 embodies reliability, efficiency, and ease of use, making it a superb choice for anyone in need of a dependable water heating solution. Its combination of innovative technology and user-centric design ensures that it not only meets but exceeds the expectations of customers, solidifying A.O. Smith's reputation as a leader in the water heater market.
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