AO Smith ProMax Water Heater

The AO Smith Promax is available in three different series that includes Standard, ProMax Plus High Efficiency and Specialty. All the three different series share a common suite of features but there are certain characteristics that are distinctive to them. Hence, they are meant to match different residential requirements and depending on needs and preferences, one can opt for the desired model among the three.


The Overview of the AO Smith ProMax Water Heater

The performance of all the three series of AO Smith water heaters are absolutely commendable, as each of the series offer distinctive features and designed to suite a wide range of different requirements. Those who are conscious about energy savings can opt for the ProMax Plus series while those facing space constraints would find ProMax Specialty apt for their purpose.

Then there are those who may generally look for a really good water heater, which offers superior performance and is completely durable too can opt for the standard series.

All the three distinctive models are fitted with superior quality components thereby giving them the versatility and durability that one seeks from a really good water heater. The ProMax Specialty is available in three models where one is table top, the second one is low-boy and the third one is point-of-use.

The Table Top and Low Boy models offer compact design and with side-mounted electric and plumbing connections. The Point-of-Use model is particularly designed for low demand applications such as in restrooms or office lavatories. Irrespective of whichever AO Smith Promax model one chooses, one is guaranteed to get complete value for their money.

ProMax Water Heaters Features and Specifications

  • Includes the Dynaclean™ diffuser dip tube to help reduce sediment and lime build up.

  • Uses an aluminum anode rod to help protect against corrosion longer than standard steel anodes.

  • Has the Permaglass® glass coating to protect the steel tank from corroding.

  • Includes a 6 year warranty that may be upgraded to 10 year warrant if you so choose.

* Top T&P Relief valve not available.
For 10 year warranty change "E" to "P" in model number.
Heater comes with a insulation blanket.
Model Number Energy Factor Gallon Cap. Element Wattage 240 VAC
Standard/Maximum
Recovery 90°F Rise Gallons First Hour
Rating Gallons
TALL MODELS
ECT-30 200 .93 30 4500/6000 21 43
ECT-40 200 .92 40 4500/6000 21 52
ECT-52 210 .91 50 4500/6000 21 60
ECT-55 210 .90 55 4500/6000 21 67
ECT-66 210 .88 66 4500/6000 21 72
ECT-80 210 .86 80 4500/6000 21 81
ECT-120* 200 .81 119 4500/6000 21 112
SHORT MODELS
ECS-30 200 .93 30 4500/6000 21 43
ECS-40 200 .92 40 4500/6000 21 52
ECS-50 210 .90 50 4500/6000 21 60
LOWBOY MODELS
ECL-30 200 .93 30 4500/6000 21 41
ECLN-40 200 .92 38 4500/6000 21 48
ECLB-40** 200 .93 38 4500/6000 21 48
ECL-50 .91 50 4500/6000 21 55

Promax Plus Water Heater - High Efficiency

  • Uses the same diffuser tube, anode rod, drain valve and glass coating as the Promax Water Heater.

  • The lower heating element is a longer lasting low-watt density copper while the upper element is high watt density copper heating element.

  • Finally it uses a 2 1/2 ” thick CFC-free insulation, external heat traps and other features to produce a more environment friendly water heater, thus the name Promax Plus water heater.

  • Also has a 6 year warranty that is optional to expand to 10 years.
* Top T&P Relief valve not available.
For 10 year warranty change "E" to "P" in model number.
Model Number Energy Factor Gallon Cap. Element Wattage 240 VAC
Standard/Maximum
Recovery 90°F Rise Gallons First Hour
Rating Gallons
TALL MODELS
ECRT-40 .93 40 4500/6000 21 54
ECRT-52* .93 50 4500/6000 21 60
ECRT-66 .92 66 4500/6000 21 76
ECRT-80* .93 80 4500/6000 21 87
SHORT MODELS
ECRS-50 .93 50 4500/6000 21 62

AO Smith ProMax Specialty Electric Water Heater Specs.

All specialty units have a standard 6 year warranty.

Table Top Promax Water Heaters
The table top model connections are all from the back of the unit and its surface is 36” off the floor.

Compact Models and Lowboy Side-Connection Models
All units have side connections with optional top connections on the compact models. The tanks have a single heating element and a sturdy brass drain valve.

Point-Of-Use Units
Have been designed for a low water usage that are in remote location. The 2 1/2 gallon tank capacity comes with wall brackets, a standard 3 prong cord and are heated with a single element.

Model Number Energy Factor Gallon Cap. Element Wattage 240 VAC
Standard/Maximum
Recovery 90°F Rise Gallons First Hour
Rating Gallons
TABLE TOP MODELS
ESTT-30 .89 27 4500/6000 21 42
ESTT-40 .88 40 4500/6000 21 52
COMPACT MODELS
EJC-6 N/A 6 1650/3000 8 N/A
EJC-10 N/A 10 1650/6000 8 N/A
EJCS-20 N/A 19 2500/6000 11 N/A
EJCT-20 N/A 19.9 2500/6000 11 N/A
LOWBOY SIDE-CONNECT MODELS
ECJ-30 .93 29 4500/6000 21 37
ECJN-40 .92 43 4500/6000 21 43
POINT-OF-USE MODEL
EJC-2 N/A 2.5 1500@120V 7 N/A

What Makes the AO Smith Promax Water Heater Attractive

Three different series of models aptly designed to suite a variety of different requirements and through this unique characteristic AO Smith offers a line of versatile and flexible hot water solutions.

AO Smith water heaters have always been known for their innovative style and design and this clearly reflects through these three distinctive models that have all the qualities to make them a series of excellent water heaters.

Whether one seeks high efficiency, like the Promax Plus water Heater or a compact water heater for point-of-use applications, AO Smith offers all the water heating solution that one needs through the AO Smith Promax series of water heaters.