Another way is you can probably just join 2 seperate breaker outlets which are 120V. Now you should consult with an electrian first before you do this because I don't know if its going to be up to code and everything. So do this under your own risk.
Depending on the jurisdiction you would have to do more than "consult" an electrician.
You nay be required to have an electrician either do the work or certify it.
But yes 240V is just using the +120 and -120 (red & black) with heavier gauge wiring and a
bigger dual pole breaker. That's how the stove and dryer do it.
That's a lot of capital overhead for a product with a limited lifecycle.
lol @ +120 and -120 on an AC circuit ffs.
Yeah, just take one leg from 1 breaker and the other leg instead of a neutral from another breaker and you can get a 240v circuit from a couple 120v outlets....make your own power cable that plug into both outlets to do it and it's done...but don't call it +120 and -120 lol...no such thing. If you don't understand how to make a 240v cable from neighboring 120v circuits then you shouldn't try it. Sidenote: "heavier gauge" is absolute nonsense since you are effectively halving the current versus a single 120v circuit. For crying out loud...if you don't understand basic household electrical wiring don't go giving fucking advice on customizing someone's home where they likely wish to sleep without risk of being burned to the ground.
Hell, I run 240v through "normal" 120v receptacles in my mining room. You can do a whole bunch of shit if you know wtf you are doing....but to "give advice" and say stupid shit like +120 line and -120 line?
?? wtf? Next you will call it 2 phase....ugh.