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. The largest models (tempra 36 and tempra 29) measure 21.7 x 14.5 x 4.6" (55.2 x 36.7 x 11.6 cm). The Tempra 24, 20, 15, and 12 are 14.6 x 14.5 x 4.6" (37.0 x 36.7 x 11.6 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!