Bradford White’s eF Series of ultra-high-efficiency gas water heaters feature electronic controls, a low-NOx premix modulating power burner, a three-pass fire-tube heat exchanger system, and versatile venting options. Its ICON HD controls combines temperature control, diagnostic codes and system ignition functions into a single control board with a digital LCD display. Energy Star models, such as the EF60T125 and EF100T, are available.