The voluntary EnerGuide label
The EnerGuide label allows consumers to check the energy efficiency of storage tank water heaters they intend to buy or rent.
The label provides a sliding scale from lowest to highest indicating which models are the most energy-efficient. Water heater manufacturers will place an EnerGuide Label in their product literature.
Electric storage tank water heaters—the energy efficiency is measured by standby loss that is indicated in Watts. The lower the number, the more efficient the model is.
Gas/propane storage tank water heaters—the energy efficiency is measured by energy efficiency ratio (EF). The higher the number, the more efficient the model is.
For gas storage tank water heaters, the EnerGuide label may be beside the ENERGY STAR® symbol for certified models.
EnerGuide label for an electric storage tank water heater
EnerGuide label for a gas or propane storage tank water heater
The ENERGY STAR name and symbol are trademarks registered in Canada by the United States Environmental Protection Agency and are administered and promoted by Natural Resources Canada.