40 Gallon Energy Smart® Electric Water Heater - 12 Year Warranty

40 Gallon Energy Smart® Electric Water Heater - 12 Year Warranty

Model: ES40R123-45D    Lowe's Item* #: 345708


  • Touch screen electronic user interface makes it easy to set temperature, operating mode, and engage safety lock feature
  • Choice of operating modes; Standard, Energy Smart® (intelligently reacts to hot water use patterns to reduce standby heat loss), and Vacation saves you money while you are away
  • Electronic thermostat employs thermistors to sense temperature, and has no mechanical parts to wear - making it more accurate and reliable than conventional thermostats
  • SmartPort equipped, means Energy Smart® is smart grid ready for future utility management, as well as plug and play ready for home automation applications
  • Premium incoloy stainless heating elements are more efficient and last longer than conventional elements
  • Extra thick environmentally friendly polyurethane foam insulation reduces heat loss for maximum efficiency, saves money
  • Self-cleaning dip tube reduces tank sediment, ensuring long tank life and optimal efficiency
  • Dry fire protection ensures the installer does not accidentally burn out the upper element when power is turned on, if the water level in the tank is not full
  • Factory installed temperature and pressure relief valve ensures safe operation
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Product Dimensions
Weight:116 lbs.
Configuration and Overview
Capacity:40 Gallons
Family Size:3
Energy Star Certified:No
Energy Factor:0.95
Annual Cost of Operations:$555
LCD Display:Yes
Self Cleaning:Yes
Warranty Tank:12 Years
Warranty Parts:12 Years
Warranty Labor:1 Year
Max Wattage:4500
Emissions Standards:No Emissions
Foam Insulation:3 inches
Water Connection Location:Top
Water Connection Size:3/4 inch
T&P Relief Valve:Yes
Energy & Eco-Friendly
Energy Factor:0.95
Energy Smart®:Self-Diagnostic Electronic Control
40 Gallon Electric Water Heater - ES40R123-45D 4.7 5 230 230
Easy to install and ease of start up We purchased this water heater as a replacement for our old, tired one. We have hard water, so it will be awhile to see how this water heater handles it, but so far, so good! April 13, 2015
Besides providing hot water, this is a nice looking unit. Was surprised to see the dielectric fittings and T & P valve were included with this water heater. Installation was non-eventful. The electronic controls were plug and play and very easy to operate. I spend more money that I ever have for a water heater and in the end I think this is going to be a good decision. March 22, 2015
Very Good Product, One Caveat The only thing I'd suggest to anyone considering this product is, if you have more than two people in your household or you like to take long showers, definitely buy the next higher gallon capacity heater. Would have given a 5 star rating but the product description we read before purchasing suggested that the 40 gallon would be sufficient for up to 3 people; since there are only 2 of us here we decided to replace our failing 50 gallon water heater with this one. After using it for 6 months, I'd say that's a stretch. It's sufficient for a home with 2 people who like short showers (doesn't describe us!) and who don't run their dishwasher very often. Adding a water saving shower head helps, so we're sticking with it. March 18, 2015
Just installed - so far it's great Just replaced a 6-year warranty 40-gal State water heater with this Whirlpool model. I picked this one for the following reasons: 1) price (was on sale at Lowes) 2) warranty (didn't want another 6-year tank that dies just over 6 years) 3) size (fits through the doorway to attic space) With the new water heater standards going into effect April 2015, I needed to replaced a failed tank with one that would fit into my attic. The new ones are supposed to be quite a bit wider (due to extra insulation to achieve new gov't ratings). This tank had 1" to spare going through my doorway to the attic. My house runs on two 40-gal, so I bought a 2nd one and will install it shortly since the remaining State tank has a slow leak. Installation was very easy. Powered it on, set it to 125F and tested the water about an hour later - nice and hot (decided to dial it back to the default setting of 120F). So, only a few hours of runtime, but so far so good. If it does not live up to expectations, I'll come back and post again. March 17, 2015
Hot water when I need it We have 3 bathrooms for the two of us, we do laundry, dishwasher and the 40 gallon electric water heater provides all of our needs. I own a 6 unit apt building and I do all my own work replacing water heaters and this unit that I purchased last September of 2014 is doing an excellent job. I always write the date of installation on the side of the unit to remove all doubt when it was installed. March 14, 2015
Just got it installed which was very easy. Love the LCD display This water heater only installed today, but everything is working great...plenty of hot water and installation went smoothly. March 12, 2015
Great product!! Great features and value for the money. I look forward to many years of great performance and energy saving too!! March 10, 2015
looks OK 90% I liked everything except drain valve, not sure if it's a good design. it turned easy with screw driver. but i don't know it will with time &corrsion. there,s no instrucions in manual how to operate it ,I tried turning the knob that was'ent to turn it on,I found out, then it sprayed water when I used screw driver, so Ihad to tighten knob to stop leak seems to work now,but position is sensitive to keep from dripping. March 9, 2015

Owners Manual
Comprehensive information about your new appliance - from getting started to cleaning and maintenance - with answers to frequently asked questions.

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Troubleshooting & Repair

IMPORTANT - Read and follow the printed Installation Instructions that came with your water heater. The printed Instructions and product labels contain model-specific information, important warnings and safety notices. If you lack the necessary skills to install, troubleshoot or repair the water heater, get help from a qualified person.

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