What size breaker needed for 240 volt 60 amp pool heater?

For a 240-volt, 60-amp pool heater, you would typically need a double-pole circuit breaker rated for at least 60 amps. However, it is recommended to use a 70-amp breaker to accommodate potential overloads and provide a safety margin. Always ensure that the wiring is appropriately sized for the amperage and consult the manufacturer's guidelines and local electrical codes for specific requirements.