How small are the Stiebel Eltron Tempra Series Electric Tankless Water Heater?

The Tempra Series tankless water heaters are about the size of a briefcase. All Stiebel Eltron Tempra series water heaters measure 16.6 x 14.5 x 4.6" (42 x 36.8 x 11.7 cm). The units are about 1/20th the size of a conventional 60 gallon tank-type water heater. Just imagine what you can do with that additional storage space!