Details:
240V – single heater for 3 to 4 hours of operation
480V – single heater for 3 to 4 hours of operation
480V – double heater for 1-1/2 to 2 hours of operation
240V – single heater for 3 to 4 hours of operation
480V – single heater for 3 to 4 hours of operation
480V – double heater for 1-1/2 to 2 hours of operation