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The ProLine® Point-of-Use electric water heater is designed for easy installation and is made specifically for areas where there is a low-demand for hot water.
With a 4-gallon (nominal) tank and 1 element delivering 1440 watts @ 120V, the ES6 4 SMT is designed to fit into tight spaces. The Glass Lined Tank and Anode Rod help protect the tank from the corrosive effects of water, and is accompanied by a 6-year limited warranty.
Dual 4500 watt elements for faster recovery and reliable operation.
• Longer lasting Stainless steel lower element
Our anode rods have a stainless steel core that extends the life of the anode rod allowing superior tank protection far longer than standard anode rods.
Number of minutes you can enjoy a shower before running out of hot water. Assumes a 2.2 GPM flow rate.Need to view or change our assumptions? Access the advanced settings.
Number of back-to-back showers you can take without running out of hot water. Assumes a 2.2 GPM flow rate and an 8 minute shower length.Need to view or change our assumptions? Access the advanced settings.
Number of showers you can take at the same time without running out of hot water.Assumes a 2.2 GPM flow rate and an 8 minute shower length.Need to view or change our assumptions? Access the advanced settings.
Biggest tub this water heater will fill without running out of hot water. Assumes a 5.0 GPM flow rate, and a 67% fill level.Need to view or change our assumptions? Access the advanced settings.
Number of minutes required to fill a 55 gallon tub. Assumes a 5.0 GPM flow rate and a 67% fill level.Need to view or change our assumptions? Access the advanced settings.
The estimated annual cost to operate this water heater in Fairfield, Connecticut.Need to view or change our assumptions? Access the advanced settings.
Many factors affect the actual performance of a water heater. This represents our closest approximation of your likely experience with this water heater in Fairfield, Connecticut, but actual performance may vary depending on factors beyond our ability to control or estimate. To view or adjust our assumptions of the most common factors that impact this product’s performance in Fairfield, Connecticut, please view the advanced settings. *Annual Estimated energy costs are estimated calculated from the energy efficiency of each water heater, your household’s estimated hot water usage & set temperature, the average groundwater temperature for your location, and residential energy prices for your location as reported by the Department of Energy and the Energy Information Administration.
Nolensville, TN 37135
84" x 28" x 28"
Shower Flow Rate
Bathtub Flow Rate
Tank Set Point
Average Air Temperature
Tub Max Fill Level
Average Hot Water Usage
Cold Water (average)
Cold Water (winter)
No Emissions Requirements
If you want to increase the water heater thermostat(s) setting(s), install thermostatic mixing valves at each point of use. The thermostat(s) on this water heater have been factory set to 120°F to reduce the risk of scald injury. Higher temperatures increase the risk of scalding, but even at 120°F, hot water can scald in a matter of minutes. If you choose a higher temperature, thermostatic mixing valves are particularly important to prevent scalding.
Answer a few questions about how much hot water you need, and we'll show you personalized recommendations and direct you to a local contractor to help with your installation.
A. O. Smith water heaters are available through your local plumbing professional.
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