Best AO Smith Electric
Water Heaters Review

Exploring the best AO Smith electric water heaters, features and benefits, including standard type and electric heat pumps, to ensure plenty of hot water for residential home use.

Model and type review

Electric water heaters from AO Smith are designed and built in the wide variety of sizes, from the smallest 2.5-gallon for point-of-use service and single application to the largest 80-gallon tanks found in heat pumps - recommended for the whole house water heating and families with 5-6 families members.

Top selling models

  • Voltex HPTU-50N
  • Proline ENS-50
  • Proline ENT-50

The above listing is from hotwater.com, official AO Smith site.

Tank type

The size of models varies - the standard water heaters are tall and mainly equipped with two heating elements, while other such as short, Lowboy, compact and Table Top - recommended for houses with the limited space, are mostly equipped with one heating element.

There are three categories of the electric water heaters available; ProLine, ProLine Master and ProLine XE, where the first group is the most affordable while the last is the most advanced.

From the most advanced group ProLine XE of the standard type, the best models are coming from PXNS and PXNT series, while if looking for more benefits, Voltex electric heat pumps are the best choice.

Top picks

AO Smith PXNSAO Smith PXNS

PXNS and PXNT are the top pick of all electric water heaters that are designed for residential and mobile homes use, and for homeowners who prefer an affordable unit with more convenience. Models are equipped with the following AO Smith exclusive features where the quality of some is just like the commercial line; Blue Diamond glass coating and Coregard anode rod, to protect the metal tank from corrosion, DynaClean Difuser dip tube (self cleaning system) that helps in the enhanced water output and reduced mineral sediments, two 5500 kW stainless steel heating elements and control panel for an added convenience.

The control panel comes with the touchscreen display for an easy use and monitoring, operating modes, diagnostics and dry fire protection.

The efficiency of PXNS and PXNT models with 50-gal capacity is 0.95 while the First Hour Rating is 75 GPH of the PXNS and 81 GPH of the PXNT.

Heat pumps

AO Smith VoltexAO Smith Voltex

AO Smith Voltex is the electric heat pump used for water heating and is the most efficient and the only type of all electric units that are Energy Star approved. AO Smith has four models to offer and for different house sizes, but the most attractive model is HPTU-50N.

Voltex heat pump HPTU-50N is the 50-gal unit, designed with the highest energy efficiency of 3.42, and according to the manufacturer that translates to great savings and over 60% water heating cost reduction. These savings vary and depend on the operating modes.

The advantage of the heat pumps is that these can heat water and cool the surrounding air at the same time. The footprint and installation are similar to the typical electric water heaters, with the same number of heating elements and dry fire protection. Electric user interface make the use very convenient and under control, as the user can easily change and monitor the settings, operating modes and check diagnostics.

While the heat pumps cost more than the standard type, the ultimate efficiency and flexibility, makes the investment worth considering, as it pays off just in few years.

Warranty

Depending on the model, AO Smith provides 6-year, 8-year and 10-year warranties on all residential models.

Related

ProLine gas
Vertex gas
Effex gas
Infinity tankless
ProLine electric
Voltex heat pumps
Power vent
Direct vent
30-gal gas  comparison
40-gal gas  comparison
50-gal gas  comparison

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