Is the A.O. Smith EETU-50 100 right for your replacement?
The A.O. Smith ProLine EETU-50 100 is a 50-gallon-class tall electric storage water heater with electronic controls and a grid-capable communication port. It may be a useful option for homeowners considering a conventional electric tank who also want the ability to participate in a compatible utility demand-response program. Water Heating Experts reviews household hot-water use, installation space and electrical requirements before recommending equipment in Palm Beach Gardens, Jupiter and surrounding communities.
The manufacturer lists 50 gallons nominal capacity, a 62-gallon first-hour rating and 0.92 Uniform Energy Factor (UEF). The first-hour rating is a standardized delivery measurement—not the water physically held in the tank or a guarantee of uninterrupted showers. A.O. Smith’s current model page lists 45 gallons of rated storage, while its grid-capable specification sheet lists 46 gallons for the EETU-50 family. We show the current exact-model product-page figure and note that discrepancy so the supplied unit can be confirmed before installation.
What does “grid-capable” actually mean?
Unlike a basic electric storage tank, the EETU-50 100 has a CTA-2045 EcoPort communication connection and a digital control panel. Its electronic controls provide operating modes, including standard and vacation modes, and diagnostic feedback. The port can allow a compatible utility demand-response device to coordinate the heater’s electrical use when a participating program offers that service.
The grid feature does not work as an automatic rebate or savings feature on its own. A compatible module must be obtained through or supported by the utility program, and local program availability, eligibility, incentives and operating arrangements must be confirmed separately. We do not assume a Florida utility supports the port, that this is a Wi-Fi water heater, or that enrolling would necessarily save money for every household.
If you mainly want a straightforward 50-gallon electric tank without demand-response capability, compare the A.O. Smith ENT-50 130 conventional tall model. It has similar overall dimensions and the same published 62-gallon first-hour rating, but it is a different product with different controls. WHE can discuss whether the extra control features are meaningful for your installation and local utility options.
Dimensions, connections and electrical requirements
The EETU-50 100 measures 59 inches tall by 20½ inches in diameter, with ¾-inch water connections at the top. That is the tank’s size, not the total installation clearance. We also check room for piping, the control panel, the temperature-and-pressure relief discharge, electrical access, drainage, service and removal of the old heater. If the water heater is in a difficult attic location, we can discuss whether relocation to a suitable garage location makes sense.
The exact-model product page specifies 240-volt power, two 4,500-watt heating elements and a maximum input of 4,500 watts. The manufacturer grid-capable sheet lists approximately 21 gallons per hour of recovery at a 90°F temperature rise. We confirm the supplied heater’s data plate, the existing electrical circuit, breaker, wiring and applicable installation instructions before specifying a replacement.
Tank protection, energy use and warranty
A.O. Smith lists a lower Incoloy stainless-steel heating element, Blue Diamond glass lining, a CoreGard anode with a stainless-steel core, a DynaClean sediment-reduction dip tube and a brass drain valve. These equipment features do not eliminate manufacturer-recommended maintenance or the need to address water-quality concerns.
The model comes with a six-year limited tank warranty and six-year limited parts warranty, subject to A.O. Smith’s written terms. Manufacturer coverage should not be read as six years of free installation or service labor. This is a conventional electric resistance storage heater, not a hybrid heat-pump water heater; if reducing electricity consumption is a top priority, WHE can help compare the space and installation requirements of hybrid heat-pump equipment.
EETU-50 100 frequently asked questions
Does grid-capable mean the water heater is connected to Wi-Fi?
No. Grid-capable here refers to a CTA-2045 EcoPort communication interface for supported utility demand-response programs. Use generally requires a compatible module and participating utility. Do not assume app-based Wi-Fi control or local program support.
Will the EETU-50 100 automatically lower my electric bill?
No savings are guaranteed. A participating utility program, compatible module and relevant usage or rate conditions are necessary for potential demand-response benefits. WHE confirms installation suitability; you should verify current program terms and eligibility with your utility.
Is the tank rated for 45 or 46 gallons of stored water?
A.O. Smith’s exact-model product page currently shows 45 gallons rated storage, while its published grid-capable specification sheet lists 46 gallons for the EETU-50 family. Both sources agree on 50 gallons nominal capacity, a 62-gallon first-hour rating, and 0.92 UEF. Confirm the delivered model’s official label and documentation before installation.
How much room does the EETU-50 100 need?
The tank is 59 inches high by 20½ inches in diameter. Top connections, electrical work, control access and service require additional room. WHE reviews photos and site measurements rather than assuming a 50-gallon model is an identical fit.
Can WHE install this model in Palm Beach Gardens or Jupiter?
WHE serves Palm Beach Gardens, Jupiter and nearby Palm Beach County communities. Mention EETU-50 100 when requesting a free installation estimate. We confirm installation requirements, model availability and scheduling separately.
Compare electric water heater options with WHE
Text a clear picture of the existing heater’s model label and a wider photo of its location and connections. We can compare the grid-capable EETU-50 100 with conventional A.O. Smith electric models and discuss which equipment fits your actual hot-water needs.
Technical references: A.O. Smith EETU-50 100 product page, A.O. Smith ProLine Grid-Capable Electric specification sheet ARESS00122 (March 2023), and grid-capable electronic control installation and use manual. Product page and family spec sheet show different rated storage values; verify the actual unit before installation. Program participation and utility incentives are not guaranteed.