“Okay,” we said to the electri- cian. “How much would it cost to increase the electrical capacity of the home?” He answered, “thousands,” and then went on to grouse about municipal permits, city inspectors, etc. So, while the new electric units can indeed offer cost savings, they require a large amount of available electric current, and you should be aware of your capacity when considering one for your home.
EVALUATING A HOME’S
ELECTRICAL SUPPLY Homeowners should have an electrician evaluate their home’s available power supply before
selecting a new electric tankless heater—particularly for the larger sized units—to ensure it will be an appropriate fit. The amperage of a house's electrical service determines how many appliances you can run at the same time. A 200-amp service allows operation of multi- ple appliances at once, while a 60-amp service won't provide enough power to run an electric hot water heater, air conditioner and hair dryer simultaneously. The size of your electrical service, can be determined by examining the main components of your house's electrical distribu- tion system—the wire, the con- duit, the meter, the panel and the main breaker. The electrical
The EcoSmart Eco- 18 model requires two 40-amp breakers for installation and has a 75-amp draw.