Is the A.O. Smith LTE-120 250 the right light-service water heater?
The A.O. Smith LTE-120 250 is a 119-gallon nominal light-service commercial electric storage water heater designed for intermittent hot-water loads in suitable commercial settings. It is not a standard residential electric tank and should not be ordered as a drop-in replacement for a typical 240V household heater. Water Heating Experts can assess the location, hot-water requirements and electrical service before determining whether this specific equipment is appropriate for a property in Palm Beach Gardens, Jupiter or a nearby area.
The manufacturer lists 108 gallons of rated storage in the 119-gallon nominal class. It also lists 98% thermal efficiency. That is a commercial thermal-efficiency figure and should not be confused with the residential Uniform Energy Factor (UEF) ratings shown on many other WHE model listings.
Who may benefit from this 119-gallon commercial model?
The LTE-120 250 has a 119-gallon nominal capacity rather than 120 gallons of rated storage. It is the largest tank in this three-model light-service group, with a 28-inch cabinet diameter and 108 gallons of rated storage. Its physical size and filled weight require careful access and floor-support checks. A large storage volume does not remove the need to assess the actual commercial hot-water demand and the 277V electric service. A.O. Smith’s own documentation describes this family as light-duty commercial equipment with intermittent rather than unrestricted continuous hot-water demand.
Compare the A.O. Smith LTE-66 250 (66 gallons nominal) and A.O. Smith LTE-80 250 (80 gallons nominal) if a different tank size might fit better. WHE looks at storage, recovery, peak demand and installation limitations rather than sizing by gallons alone.
Electrical supply: 277V and simultaneous heating
For the exact LTE-120 250 model, A.O. Smith lists 277V single-phase power, two 6,100-watt elements, 12,200 watts maximum input and approximately 44.04 amps at rated input. The standard factory wiring permits simultaneous operation, unlike the non-simultaneous element configurations used by many residential electric water heaters. The manufacturer’s recovery table shows about 56 gallons per hour at a 90°F temperature rise for the standard 12.2 kW setup.
This is a substantial commercial electrical load. Before proposing it, WHE verifies whether the building actually has a compatible 277V service, checks the required branch circuit, conductor sizing, overcurrent protection and disconnection arrangements, and coordinates with a qualified electrician when needed. We will not assume that the 240V circuit serving a residential tank is compatible.
Dimensions, plumbing and commercial installation
The tank measures 61.5 inches high × 28 inches in diameter, according to A.O. Smith’s exact-model technical listing. The heater has ¾-inch top water connections. Those dimensions do not include piping or clearance for the top-mounted electrical junction box, anode access, relief-valve discharge, drainage, element service and safe removal of the old heater. The manufacturer lists approximately 268 pounds shipping weight; the installed, filled weight will be substantially greater.
The water heater is designed for indoor commercial use, with a 150-psi maximum working pressure and a factory-installed temperature-and-pressure relief valve. A.O. Smith lists the tank itself as not ASME-certified—that should not be confused with the certification of the relief valve. WHE checks the project’s requirements and equipment approvals before recommending it.
The thermostat adjusts from approximately 120°F to 181°F and includes a manual-reset high-temperature cutoff. Water at elevated temperatures can cause serious scald injuries, so the intended operating temperature, point-of-use protection, tempering or mixing, and applicable code requirements must be considered for the building. WHE will not assume that a high storage-temperature setting is suitable for the fixtures served.
Tank protection, maintenance and warranty
The Light-Service series uses glass-lined tanks, CoreGard anode rods with stainless-steel cores, zinc-plated copper-sheathed heating elements and a commercial-grade enhanced-flow brass drain valve. A.O. Smith states that it meets applicable DOE and ASHRAE/IES 90.1 standby-loss requirements. These features do not eliminate maintenance, draining or water-quality considerations.
The exact series lists a six-year limited tank warranty and one-year limited parts warranty, subject to the written terms. Manufacturer warranty coverage is not a promise of six years of parts or installation labor. Model availability, installation scope and any labor coverage through WHE are confirmed during the estimate.
LTE-120 250 frequently asked questions
Is this a residential 119-gallon water heater?
No. A.O. Smith markets the LTE-120 250 as a light-service commercial electric heater for intermittent commercial hot-water loads. Its 277V, 12.2 kW simultaneous electrical configuration is different from many household 240V water heaters.
How much water does the LTE-120 250 actually store?
Its nominal capacity is 119 gallons, while the manufacturer lists 108 gallons of rated storage. A storage rating is not the same as a first-hour delivery rating or a guarantee that it suits every commercial demand pattern.
Can this run on an existing 240V water-heater circuit?
Not by assuming compatibility. The exact LTE-120 250 listing specifies 277V single-phase, dual 6,100W elements, 12,200W maximum input and simultaneous operation. Electrical service and circuit design must be assessed for the actual building and delivered configuration.
Is 98% thermal efficiency the same as UEF?
No. A.O. Smith lists 98% thermal efficiency for this commercial electric model. That metric should not be directly equated with the residential UEF values used for many conventional or heat-pump water heaters.
Can WHE install this model in northern Palm Beach County?
WHE evaluates suitable water heater projects in Palm Beach Gardens, Jupiter and nearby communities. Mention the exact LTE-120 250 in your free estimate request, along with the property use and existing electrical equipment. We confirm whether the application and required service are within scope before offering equipment or scheduling.
Discuss a light-service commercial water heater with WHE
Text a clear photo of the current water heater’s model/electrical label and a wider photo showing the tank, top connections, controls and available space. Describe how the property uses hot water and whether a licensed electrician has confirmed 277V service. WHE can help review suitable options without assuming this commercial heater fits a residential installation.
Manufacturer sources: A.O. Smith LTE-120 250 exact-model product page; Light-Service Commercial Electric specification sheet AOSCE15701; and manufacturer Light-Service Series 250 installation manual. Model listing and specification sheet identify 277V/12.2kW simultaneous operation and six-year limited tank/one-year limited parts coverage. Check the delivered unit’s data plate and current manufacturer instructions before installation; no price, availability, rebates or expected savings are guaranteed.