Bosch Thermotechnology’s Tronic 5000 WH36 comes with an efficiency rating of 97% and can provide endless hot water for up to two major applications at a time. It can be installed virtually anywhere inside a home to provide whole-house hot water on demand — at 5 gpm. It experiences minimal standby loss and a constant output temperature. It comes with a filter screen on the unit’s inlet and provides scale resistance buildup over time. The unit requires hard wiring through double-pole breakers in the breaker box and 180 amps.