Most electric cabin saunas — infrared or traditional — draw enough current that manufacturers specify a dedicated 240V circuit, meaning a circuit that serves only that appliance. Running one on a shared standard outlet can trip breakers or, in some cases, create a fire risk.
Portable units like sauna blankets and domes are the exception, typically running on a standard 120V household outlet with no electrical work required. If you're comparing a cabin sauna to a portable option, the electrical requirement is one of the most overlooked cost differences — budget for an electrician if you're going the cabin route.