A. O. Smith On-Demand Gas Water Heaters

Residential and Commercial Product Features:

Innovative Technology

A variety of indoor installation options

Continuous hot water on demand (up to 9.8 GPM)

Whole house water heating solution

Direct electronic ignition – no pilot light

On-board diagnostics and safety monitoring

Interior sealed combustion

(does not use interior combustion air)

Excellent Performance

Outlet Flow Data

12-year limited warranty on heat

 

exchanger, 5-year warranty on all parts

 

Models available that meet requirements

of ASME Boiler and Pressure Vessel Code

Energy Efficiency

Up to 84% thermal efficiency, providing significant energy cost savings

Model Specifications

Model

 

305

 

505

 

705

 

 

 

 

 

 

 

Minimum Gas Consumption Btu/h

 

15,000

 

19,000

 

 

 

 

 

 

Maximum Gas Consumption Btu/h

199,000 Natural Gas

 

237,000

 

 

 

190,000 Propane Gas

 

 

Hot water capacity (Min - Max)*

 

0.6 - 5.3 GPM

 

0.6 - 8.5 GPM

 

0.6 - 9.8 GPM

 

 

 

(2.3 - 20.1 L/min)

 

(2.3 - 32.0 L/min)

 

(2.3 - 37 L/min)

Hot water capacity (45°F rise)

 

 

 

7.4 GPM (28.0 L/min)

 

 

 

 

 

5.3 GPM

 

Natural Gas

 

8.8 GPM

 

 

 

(20.1 L/min)

 

7.1 GPM (26.9 L/min)

 

(33.5 L/min)

 

 

 

 

 

Propane Gas

 

 

Default Temperature Setting (no controller)

 

 

120º F (49º C)

 

 

 

 

 

 

 

 

 

Remote Controller Default Temperature Setting

 

 

104º F (40º C)

 

 

 

 

 

 

 

 

Maximum Temp Setting (Commercial**)

160º F (71º C)

 

185º F (85º C)

 

 

 

 

 

 

 

 

Maximum Temp Setting (Residential)

 

 

140º F (60º C)

 

 

 

 

 

 

 

 

 

Minimum Temperature Setting

 

 

 

98º F (37º C)

 

 

 

 

 

 

 

 

 

Weight

 

 

50 lb (23 kg)

 

55 lb (25 kg)

 

 

 

 

 

 

 

 

Efficiency Rating

 

 

84%

 

 

 

 

 

 

 

 

 

 

Noise level

 

 

 

49 dB

 

 

 

 

 

 

 

 

 

Electrical Consumption

 

Normal

 

79 W

 

99 W

 

 

 

 

 

 

 

 

 

 

Standby

 

2.8 W

 

2 W

 

 

 

 

 

 

 

 

 

 

Anti-frost Protection

 

100 W

 

116 W

 

 

 

 

 

 

 

 

By-Pass Control

 

Fixed

 

Electronic

 

Minimum Gas Supply Pressure

 

Natural Gas

5.0 inch W.C.

 

 

 

Propane

8.0 inch W.C.

 

Maximum Gas Supply Pressure

 

Natural Gas

10.5 inch W.C.

 

 

 

 

 

 

 

 

 

 

Propane

13.5 inch W.C.

 

 

 

 

 

 

 

Type of Appliance

 

Direct Vent, Temperature controlled continuous flow gas hot water system.

 

 

 

 

 

 

Operation

 

With or without remote controls, mounted in kitchen, bathroom, etc.

 

 

 

 

 

 

Approved Gas Type

 

Natural Gas or Propane - Ensure unit matches gas type it's being installed on.

 

 

 

 

 

 

Connections

 

Gas Supply: 3/4˝ MNPT, Cold Water Inlet: 3/4˝ MNPT, Hot Water Outlet: 3/4˝

 

 

 

 

 

 

 

Ignition System

 

Direct Electronic Ignition

 

 

 

 

 

 

 

Electric Connections

 

Appliance: AC 120 Volts, 60Hz. Remote Control: DC 12 Volts (Digital)

 

 

 

 

 

 

 

Water Temperature Control

 

Simulation Feedforward and Feedback.

 

 

 

 

 

 

 

Water Supply Pressure

 

Minimum Water Pressure: 20 PSI (Recommended 30-80 PSI for maximum

 

 

 

 

 

 

 

 

Maximum Water Supply Pressure

 

150 PSI

 

 

 

 

 

 

 

 

 

 

 

Remote Control Cable

 

Non-Polarized Two Core Cable (Minimum 22 AWG)

 

 

 

 

 

 

 

 

 

*Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature. ** for commercial and hydronic applications requiring higher temperatures

Specifications are subject to change without prior notice.

The maximum inlet gas pressure must not exceed the value specified by the manufacturer. The minimum value listed is for the purpose of input adjustment.

500 Tennessee Waltz Parkway Ashland City, TN 37015 www.hotwater.com

AMGSS00207 ©2007 A. O. Smith Corporation

A. O. Smith reserves the right to make product changes or improvements at any time without notice.

Printed in U.S.A

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A.O. Smith dimensions Residential and Commercial Product Features, Model Specifications, Model 305 505 705

705, 505, 305 specifications

A.O. Smith, a leader in the water heating industry, offers an innovative range of water heaters, among which the A.O. Smith 305, 705, and 505 models stand out due to their advanced features and technologies. These models are designed to provide efficient water heating solutions for both residential and commercial applications.

The A.O. Smith 305 is a high-efficiency water heater that showcases cutting-edge technology. It features a robust design with a high recovery rate, making it suitable for larger households. The 305 model incorporates advanced insulation that reduces heat loss, allowing for more economical energy use. Additionally, its digital display allows homeowners to monitor temperature and settings easily, while the user-friendly interface ensures quick adjustments as needed.

The A.O. Smith 705 model takes innovation further with its smart technology integration. It offers Wi-Fi connectivity, enabling users to control and monitor their water heating system remotely through a mobile app. This feature not only enhances convenience but also allows users to participate in energy-saving programs by optimizing usage patterns. The 705 model is equipped with multiple safety features, including temperature limit controls and corrosion-resistant materials, extending its lifespan and reducing maintenance needs.

Meanwhile, the A.O. Smith 505 is known for its compact design and versatility. Ideal for smaller spaces, it provides a reliable source of hot water without occupying a significant footprint. The 505 model excels in energy efficiency, making it a favorite for eco-conscious consumers. It incorporates advanced heating technologies that ensure quick recovery times and consistent water temperatures, regardless of demand.

All three models incorporate A.O. Smith’s patented technology that enhances safety and reliability. Features such as built-in thermostats, high-efficiency burners, and reinforced tank designs contribute to a product line that is renowned for durability. These models also adhere to strict energy efficiency standards, helping consumers reduce their utility bills while minimizing their environmental footprint.

Overall, A.O. Smith's 305, 705, and 505 water heaters present a compelling blend of efficiency, convenience, and advanced technology, catering to a diverse array of water heating needs. Whether for a busy family household or a compact living space, A.O. Smith continues to lead the way in providing dependable and innovative heating solutions.