240 is available everywhere in the US, just the regular wall plugs are only using one phase of the two phase input. Often half the house is run on 1 phase and the other half on the opposite phase.
Many homes already have 240 plugs behind stove and dryer installations. And even if you don't already have one you just need to stick a new breaker in the panel and run a wire using both phases together instead of a neutral or ground.
Many homes already have 240 plugs behind stove and dryer installations. And even if you don't already have one you just need to stick a new breaker in the panel and run a wire using both phases together instead of a neutral or ground.