Running a dedicated 220v circuit and changing the plug to fit it if necessary would not be a problem. After studying their site, I see now that there would be no advantage to choosing 220v over 120v AC. The roaster is set to run at 1500 watts no matter if the voltage is 120v or 220v. It will draw just under 7 amps if wired for 220v and just under 13 amps if wired for 120v. It's the same amount of energy used, 1500 watts regardless of the input voltage it is wired for.
kp