Is the ENLB-30 110 a good fit for your replacement?
The A.O. Smith ENLB-30 110 is a compact electric storage water heater with top water connections. Its lowboy shape is useful when height is limited, but choosing a smaller tank is about more than making the heater fit. At Water Heating Experts, we check how much hot water the household uses, the space around the existing heater, and the plumbing and electrical connections before recommending a replacement.
A.O. Smith lists this as a 28-gallon nominal model with 26 gallons of rated storage. Its 43-gallon first-hour rating measures hot-water delivery during a standardized test, not how much water the tank holds at one time. A smaller tank may be suitable where demand is modest, but it may not keep up with several back-to-back showers or simultaneous use.
Size, water connections and installation clearance
The ENLB-30 110 measures 30 inches high and 20 inches in diameter. It uses top-mounted 3/4-inch water connections. Those dimensions do not include the extra space needed for piping, valves, access panels and future service. We measure the entire installation area, not just the old tank, and consider removal access, drainage and the required temperature-and-pressure relief discharge.
For comparison, the A.O. Smith ENLB-40 110 lowboy measures 32 inches high by 23 inches in diameter and has a 38-gallon nominal capacity. If both will fit, the larger model’s greater storage and first-hour delivery may be worth discussing. We can compare the space available and your household’s real hot-water needs.
Hot-water recovery and electrical requirements
This model uses 240-volt electricity with two 4,500-watt heating elements and a maximum connected input of 4,500 watts in its standard configuration—not 9,000 watts. A.O. Smith lists recovery at approximately 21 gallons per hour at a 90°F temperature rise. Recovery and first-hour rating are different measures, so neither guarantees unlimited hot water.
We verify the exact heater’s data plate, existing wiring, breaker and applicable installation requirements before specifying the equipment. The model also ships with an insulation blanket. Its listed efficiency is 0.89 Uniform Energy Factor (UEF). If reducing electric consumption is a primary goal and space permits, we can discuss hybrid heat-pump water heaters as an alternative.
Tank protection, maintenance and warranty
A.O. Smith lists Blue Diamond glass lining, a CoreGard anode with a stainless steel core, an Incoloy lower heating element and a brass drain valve. Tank-protection features do not eliminate the need for proper installation and maintenance.
The listed warranty is six years limited coverage for the tank and parts, subject to the written warranty terms. Installation and replacement labor are not automatically included. We confirm unit availability, installation scope and any applicable labor coverage when preparing your estimate.
Questions about the A.O. Smith ENLB-30 110
Is the ENLB-30 110 a 30-gallon or 28-gallon water heater?
The model number includes “30,” but A.O. Smith’s current specification lists 28 gallons nominal capacity and 26 gallons rated storage. We use the published capacity figures when comparing water heaters.
Will this lowboy fit inside my existing closet?
Possibly. The heater is 30 inches tall and 20 inches in diameter, but top water connections and service access require additional space. Photos and measurements help WHE determine whether the installation is practical.
How does this compare with the ENLB-40 110?
The ENLB-30 110 is smaller and has a 43-gallon first-hour rating; the ENLB-40 110 has more storage and a 51-gallon first-hour rating. We would compare hot-water use and installation clearances before recommending either.
Can WHE install this model in Palm Beach Gardens or Jupiter?
WHE serves Palm Beach Gardens, Jupiter and nearby Palm Beach County communities. Request a free installation estimate and mention ENLB-30 110. We will confirm your location, model suitability, availability and schedule.
Plan an electric water heater replacement with WHE
For a more accurate recommendation, send a photo of your current water heater’s data label and another showing the tank, piping and surrounding clearance. We can compare this lowboy with other A.O. Smith water heater options and review the work needed for a safe replacement.
Technical references: A.O. Smith ENLB-30 110 product page, manufacturer’s ProLine specification sheet (March 2025), and manufacturer’s residential limited warranty. Always confirm the supplied unit’s label and current installation instructions before work begins.