Stiebel-Eltron Tempra 20 tankless water heater for modest sized houses. Weighing in at 21lbs, this water heater measures 14.2”x 21.75” x 4.6” and uses 240V/80AMP/19.2KW of electricity. It requires a minimum breaker size of 2 x 50A and wire size AWG copper 2 x 8. Featuring minimum flow to activate at .58 gallons per minute and water connections of 3/4” NPT. Offering temperature range of 85 to 125 degrees and an anti-scalding device, this is the perfect water heater for small families. SAVE ELECTRICITY AND HAVE YOUR HOT WATER TOO!