The patented Blue Diamond™ Glass formula which makes AOS tanks so lasting is known to only 7 people in the world.
A. O. Smith has been refining water heating technology for the last 140 years. Every A. O. Smith heater is equipped with cutting edge, patented technology. Other heaters may look like A. O. Smith heaters but they do not work the same way.
Well insulated water heater tanks are very important because they lower energy costs.
With over 150 years of water heater innovation, A. O. Smith is the leading producer of water heaters.
A. O. Smith does not outsource manufacturing. They own each of their 21 factories worldwide. The factories are 95% automated for optimal quality control.
| MODEL | EES-30 | EES-40 | EES-50 | EES-80 |
| DIAMETER (MM) | Ø520 | Ø520 | Ø520 | Ø610 |
| LENGTH (MM) | 940 | 1150 | 1365 | 1470 |
| SPECS | EES-30 | EES-40 | EES-50 | EES-80 |
| Rated volume (L) | 114 | 152 | 190 | 304 |
| Power (kW) | 3.8 – 4.5 / 6.7 – 7.0 | 3.8 – 4.5 | 3.8 – 4.5 | 3.8 – 4.5 |
| Voltage/frequency (V/Hz) | 220~/50 | 220~/50 | 220~/50 | 220~/50 |
| Temperature range (°C) | 32 – 65 ± 5 | 32 – 65 ± 5 | 32 – 65 ± 5 | 32 – 65 ± 5 |
| Rated water pressure (MPa) | 0.8 | 0.8 | 0.8 | 0.8 |
| Inlet/outlet connection (inches) | ¾ | ¾ | ¾ | ¾ |
| Waterproof grade | IPX1 | IPX1 | IPX1 | IPX1 |
| Net weight (kg) | 41 | 43 | 63 | 94 |
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