Please ensure Javascript is enabled for purposes of website accessibility

We are closed on Friday, July 4th, 2025 for Independence Day weekend and reopening Monday July 7th, 2025. Enjoy and be safe.

We ship to most places in continental USA
Chat with us
Need help
Our Locations

AO Smith 100223847 ENS-40 Proline 40 Gallon Short Residential Electric Water Heater - 6 Year Warranty

SKU
SMIENS40

In Stock. Ships in 1-7 Business Days.

Retail : $1,192.00 - $439.61 =
$752.39 You Save (37%)
40 Gallons
- +
40 Gallons

Product details

AO Smith ENS-40 Residential Electric Water Heater, 40 Gallons, 4.5 / 4.5KW, 240V, 6 Yr Tank / Pts Warranty. Old Model = SMIECS40, ECS-40

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-40 delivers a first hour rating of 55 gallons at an Uniform Energy Factor of 0.92. The Coregard sacrificial anode helps protect the tank from the corrosive effects of water, and is accompanied by a 6-year limited tank warranty.

AO Smith Proline® Standard Commercial-Grade Residential Water Heater

PROLINE® STANDARD COMMERCIAL-GRADE RESIDENTIAL

    ENHANCED HEATING ELEMENTS
    • Dual 4500-watt elements for fast recovery and reliable operation
    • Incoloy stainless steel lower element lasts longer than a standard copper element
    DYNACLEAN DIFFUSER DIP TUBE
    • Helps reduce lime and sediment buildup and maximizes hot water output. Made from long-lasting PEX cross-linked polymer (diffuser design is not used on lowboy models.)
    HIGH ENERGY FACTORS
    • Eco-friendly non-CFC foam insulation, heat traps and other features combine to yield a higher Energy Factor that maximizes savings on operating costs.
    COREGARD ANODE ROD
    • 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
    BLUE DIAMOND GLASS COATING
    • Provides superior corrosion resistance compared to industry standard glass lining
    ENHANCED-FLOW BRASS DRAIN VALVE
    • Our residential water heaters have a solid brass, tamper resistant, enhanced-flow, ball type, drain valve
    • Uses a standard female hose fitting that allows for fast and easy draining during maintenance
    • Designed for easy operation, this valve includes an integral screwdriver slot that features a ¼ turn (open/close) radius, which not only permits full straight-through water flow but also a quick and positive shut-off
    APPROVED FOR MANUFACTURED HOUSING
    • All residential electric water heaters are compliant with HUD Standards for mobile homes/manufactured housing
    DESIGN-LISTED BY UNDERWRITERS LABORATORIES
    • Certified at 300 psi test pressure and 150 psi working pressure
    • Listed according to UL 174 standards governing storage tank-type electric water heaters
    Warranty
    • 6-Year Limited Tank and Parts Warranty
AO Smith
See All AO Smith Products

Specification Sheet

Basic Information
MPN ? Manufacturer Part Number 100223847
UPC / GTIN 671657196981
Manufacturer AO Smith
Series ? A manufacturer's grouping of items that match, coordinate, or complement each other. ProLine
Dimensions and Measurements
First Hour Rating 55 Gallons
Kilo Wattage 4.5 / 4.5KW
Height (Inches) ? The vertical measurement from bottom to top, measured in inches. 49-3/4"
Width (Inches) ? The horizontal measurement from left to right, measured in inches. 20-1/2"
Depth (Inches) ? Depth 20-1/2"
Gallons 40 Gallons
Voltage 240 V
Weight ? Weight 98.00
Characteristics and Features
Warranty ? The terms and conditions of the warranty provided for the product from the manufacturer. 6 Years
Water Heater Type Residential
Type Short
Water Connection Location Top
Fuel Type Electric
Energy Star No
Warranty and Product Information
Product Warranty 6 Years Tank / Parts Warranty
More from AO Smith
Document

Click Here to Explore All Tank Water Heaters



By using this site you agree to our Terms, Conditions of Use and Privacy Statement
© 2025 AF Supply Corp. All Rights Reserved.