If I’m not mistaken 15A is a standard residential wall outlet with 14 AWG wires. 20A isn’t that much more but since it’s not standard, I think it would require a higher gauge of wire such as 12 AWG and an updated breaker. I don’t know much about electricity either
Oh that's nice! About a year ago I was considering a 20A countertop appliance (espresso machine), but my kitchen only had 20A plugs for the fridge/oven.