Name: A.O. Smith Signature 100 55-Gallon Tall 6-year Warranty 4500-watt Double Element Grid Capable Electric Water Heater
Brand: A.O. Smith
SKU: 5014109525
Price: 869 USD
Availability: InStock
Rating: 4.5 (47 reviews)

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A. O. Smith's 55-gallon water heater delivers efficient and reliable hot water for 3 to 5 person households when sized appropriately. This unit includes a Demand Response (CTA-2045 Eco Port) communication port, enabling participation in Utility Demand Response programs (module available from local utility companies). Dual copper heating elements, a protective anode rod and a ceramic fused tank shield reduce corrosion and provide ultimate tank protection. Built to last, this 55-gallon electric water heater also features a self-cleaning dip tube to minimize sediment build-up and extend the unit's lifespan. A 6-year limited warranty offers additional peace of mind. This model operates at a 0.94 Uniform Energy Factor (UEF), reducing energy bills and expenses compared to traditional units. Call 1-877-GOLowes to get this water heater installed.

Built-in CTA-2045 port lets homeowners connect to local Utility Smart Grid Programs (where available) for advanced utility savings
Offers electronic controls with standard and vacation operating modes, six-segment display, diagnostic feedback and element "dry-fire" protection
Meets state of Washington and Oregon requirements
Delivers the ideal amount of hot water for households with 3 to 5 people when sized appropriately
Features two 4,500-watt copper heating elements that provide a first hour delivery of 75 gallons
Save money and energy with this energy-efficient water heater that operates at a 0.94 Uniform Energy Factor (UEF)
Tall, streamlined 56.5-in H x 24-in diameter profile supports installation in compact spaces
Premium heating elements, anode rod and fused ceramic tank shield provide superior tank protection and extend water heater life
Provides peace of mind with a 6-year limited tank and parts guarantee and a 1-year limited labor warranty

General
Type	Tank	Use Location	Indoor
Grade	Residential	Series Name	Signature 100
Power Source	Electric

Dimensions
Nominal Capacity (Gallons)	55	Weight (lbs.)	131
Rated Storage Capacity	55-Gallon	Width (Centimeters)	24
Depth (Inches)	24	Family Size	5
Diameter (Inches)	24	Water Connection Size	3/4-in
Height (Inches)	56.5	Insulation Thickness (Inches)	3

Features
Hybrid Heat Pump Technology	No	Voltage (Volts)	240
Point of Use	No	Foam Insulation	Yes
Annual Fuel Utilization Efficiency % (Percentage)	0	GPH Recovery at 90 Degrees F (Gallons)	20.7
Uniform Energy Factor	0.94	Temperature and Pressure Relief Valve	Yes
Super High Efficiency	Yes	Water Connection Location	Top
Grid Capable	Yes	Water Heater Style	Tall
Scale Prevention	No	Leak Detection	Yes

Compatibility
For Use with RVs	No	Works with Android	No
Works with Apple HomeKit	No	Wi-Fi Compatibility	No
For Use with Mobile Homes	Yes	Works with the Google Assistant	No
Works with SmartThings	No	Bluetooth Compatibility	No
Works with Amazon Alexa	No	Smart Compatible	No
Works with iOS	No

Warranty
Warranty	6-year limited

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -	AHRI Certified	Yes
ENERGY STAR Certified	No	Safety Listing	UL safety listing

Miscellaneous
UNSPSC	40101800

Check out the Best Selling Water Heaters on Lowes.com

Review

4.5 out of 5

47 Reviews

81% Recommend this product

Ratings may include incentivized customer reviews.

47 Customer Reviews

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Tall and skinny

Would Recommend

Just the size I needed. Easy startup.

HomeownerSeptember 18, 2026
From Signature 100 50-Gallon Tall 6-year Warranty 4500-watt Double Element Grid Capable Electric Water Heater Verified Purchaser

Was this Review Helpful ?

Great product

Would Recommend

Thank you Lowe’s for the great customer service and for stocking great brands.

LandoJuly 19, 2026
From Signature 100 40-Gallon Tall 6-year Warranty 4500-watt Double Element Grid Capable Electric Water Heater

Was this Review Helpful ?

Would Recommend

Very impressed with the digital temperature readout.

BethJuly 8, 2026
From Signature 100 40-Gallon Tall 6-year Warranty 4500-watt Double Element Grid Capable Electric Water Heater Verified Purchaser

Was this Review Helpful ?

Great Value

Would Recommend

This was just the unit we were looking for. We’ve had one the past and it was a workhorse.

Ken_RemyMay 20, 2026
From Signature 100 50-Gallon Tall 6-year Warranty 4500-watt Double Element Grid Capable Electric Water Heater Verified Purchaser

Was this Review Helpful ?

Wont run with a circ pump attach to a hybred hwh.

Would Not Recommend

Will not run with a circulating pump and will shut down on f21 or f22,

Grand paApril 16, 2026
From Signature 100 50-Gallon Tall 6-year Warranty 4500-watt Double Element Grid Capable Electric Water Heater Verified Purchaser

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Response from Published by the A. O. Smith Team

That is correct, a hybrid water heater will not run with a recirculation pump per the manual.

Published by the A. O. Smith TeamApril 16, 2026

5 Questions

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does it come in a box and what are the dimensions of the box?

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COMPARE PRODUCTS

		Name	Current Item A.O. SmithSignature 100 55-Gallon Tall 6-year Warranty 4500-watt Double Element Grid Capable Electric Water Heater
		Ratings	47
		Type	Tank
		Height (Inches)	56.5
		Power Source	Electric
A.O. SmithSignature 300 40-Gallon Tall 9-year Warranty 5500-watt Double Element Grid Capable Smart Electric Water Heater with Leak Detection	A.O. SmithSignature 300 55-Gallon Tall 9-year Warranty 5500-watt Double Element Grid Capable Smart Electric Water Heater with Leak Detection	A.O. SmithSignature 300 50-Gallon Tall 9-year Warranty 5500-watt Double Element Grid Capable Smart Electric Water Heater with Leak Detection	A.O. SmithSignature 500 50-Gallon Tall 12-year Warranty 5500-watt Double Element Grid Capable Smart Electric Water Heater with Leak Detection and Automatic Shut-off	A.O. SmithSignature 500 55-Gallon Tall 12-year Warranty 5500-watt Double Element Grid Capable Smart Electric Water Heater with Leak Detection and Automatic Shut-off	A.O. SmithSignature 100 74-Gallon Short 6-year Warranty 75100-BTU Natural Gas Water Heater	A.O. SmithSignature 500 55-Gallon Tall 12 Year Warranty 5500-watt Grid Capable Smart Electric Water Heater with Leak Detection Automatic Shut Off Valve and Smart Mixing Valve	A.O. SmithSignature 300 50-Gallons Short 9-year Warranty 5500-watt Double Element Grid Capable Smart Electric Water Heater with Leak Detection	A.O. SmithSignature 500 50-Gallons Short 12-year Warranty 5500-watt Double Element Grid Capable Smart Electric Water Heater with Leak Detection and Automatic Shut-off
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61.5	56.5	59	60.25	60.5	61	60.5	49.76	49.25
Electric	Electric	Electric	Electric	Electric	Gas	Electric	Electric	Electric