Earlier quoted context omitted.
This plus the comment about sharing a circuit with an oven. If the oven is electric, even in the US it is 220v. If it is gas only, then it could be 120v as it only needs to run the igniter and other circuitry without running any heating elements.
I think he said sharing a circuit with a fridge, which are generally 110 in the US -- i think this is how my apartment is wired (2-phase 30A to oven dedicated, one 20A for the whole rest of kitchen) Trying to run a resistive heater on the same circuit as a fridge compressor without tripping leans towards very conservative wattage
Just a waste of copper and a beaker really.