ProLine® 40-Gallon Short Electric Water Heater

Model ENS-40W 110
3.3 out of 5 Customer Rating
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Capacity (Gallons)
Limited Tank Warranty
Height Classification
Blanket
First Hour Rating

  • Delivers 41-gallon first hour rating
  • Single commercial-grade heating element available in minimum 1,000 kW
  • Long-lasting lower Incoloy™ stainless steel element

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    What to Expect from this Model
    modal-clock
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    Number of minutes you can enjoy a shower before running out of hot water. Assumes a 2.1 GPM flow rate
    15.1 minutes
    single shower length
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    Number of back-to-back showers you can take without running out of hot water. Assumes a 2.1 GPM flow rate and an 8 minute shower length
    1.9 showers
    back-to-back
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    Number of showers you can take at the same time without running out of hot water. Assumes a 2.1 GPM flow rate and an 8 minute shower length
    1.8 showers
    at the same time
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    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
    45 gallons
    max tub size
    modal-cost
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    The estimated annual cost to operate this water heater in your location
    $547/year
    est. energy cost
    Based on location results for Columbus, OH 43215
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    Product Details
    • Delivers 41-gallon first hour rating
    • Single commercial-grade heating element available in minimum 1,000 kW
    • Long-lasting lower Incoloy™ stainless steel element
    • HUD compliant, approved for mobile homes/manufactured housing
    • Patented Blue Diamond® glass tank lining protects against corrosion
    • DynaClean™ automatic cleaning system protects against sediment build-up
    • Stainless steel CoreGard™ anode rod protects against corrosion longer than ordinary anodes
    • Commercial-grade brass drain valve for durable and easy operation
    • CSA Certified and ASME Rated T&P Relief Valve, Factory-Installed
    • 6-year limited tank and parts warranty

      • The ProLine® Standard Electric water heater is the reliable choice when you are looking to maximize your hot water output and is designed with environmentally-friendly insulation to reduce standby heat loss. With a 40-gallon (nominal) tank delivering 4,500 watts, the ENS-40W delivers a first hour rating of 41 gallons at a Uniform Energy Factor of 0.88. Environmentally-friendly insulation and factory-installed heat trap nipples reduce heat loss for maximum energy savings. This ProLine® water heater is designed with A. O. Smith's superior commercial-grade tank protection. Advanced tank features include stainless steel CoreGard™ anode rod, Blue Diamond® glass lining and DynaClean™ automatic sediment-cleaning system, all designed to help protect the tank from the corrosive effects of water and extend the life of the water heater. All of these features are accompanied by a 6-year limited tank warranty. A. O. Smith’s ProLine® water heaters are residential products built to commercial-grade standards and are only available for purchase through professional wholesalers and contractors.

    Specifications
    Tech Specs
    Nominal Gallon Capacity
    40 Gallons
    Rated Storage Volume
    37 Gallons
    UEF
    0.88
    Power Source
    ELECTRIC
    Limited Tank Warranty
    6 Years
    Limited Parts Warranty
    6 Years
    Water Connection Location
    TOP
    Water Connection Size
    0.75"
    First Hour Rating
    41 Gallons
    ASME Certified
    No
    Blanket Included
    No
    Destination Country
    US
    Installation Type
    INDOOR
    Max Wattage
    3,500
    Number of Elements
    2
    Application
    RESIDENTIAL
    Product Tier
    ProLine®
    Shipping Height 
    53.5"
    Shipping Length 
    23.69"
    Shipping Width 
    21.5"
    Side Loop
    No
    Voltage
    240
    Dimension & Venting
    Type
    Water Heater
    Height
    49.75"
    Diameter
    20.5 in."
    Shipping Weight
    98lbs
    Maintenance & Troubleshooting
    Maintenance

    ProLine® Electric Adjusting the Thermostat

    ProLine® Electric Application and Installation

    ProLine® Electric Checking and Replacing Lower Heating Element.

    ProLine® Electric Checking and Replacing Upper Heating Element.

    ProLine® Electric Not Enough Hot Water

    ProLine® Electric Replacing the Lower Thermostat

    ProLine® Electric Replacing the Upper Thermostat

    Troubleshooting

    ProLine® Electric Tripped ECO

    ProLine® No Hot Water

    Marketing Videos
    ProLine® Electric Features and Benefits
    ProLine® Electric How It Works
    All Reviews for ProLine® Standard Electric (110 series)
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