The circuit breaker size required for an electric tankless water heater varies drastically based on the kilowatt (kW) draw and amperage demands of the specific model, typically requiring double-pole breakers ranging from 40 amps to multiple 40-amp or 50-amp circuits. Smaller single-chamber electric tankless units may operate on a single heavy-duty circuit, whereas whole-home electric tankless systems often demand immense electrical loads (such as 24 kW or higher) requiring multiple dedicated double-pole breakers and heavy-gauge copper wiring. Because these power requirements frequently exceed standard household electrical panel capacities, consulting a licensed electrician for a load calculation is mandatory before purchase.
1 votes
Marked as accepted