How would I know if I have a 20 Amps outlet that's...
Q: How would I know if I have a 20 Amps outlet that's required for some saunas?
A: 20 amp outlets have a special sideways T for one prong. This is so that a device that requires 20 amps can't be plugged into an ordinary 15 amp outlet.
If you cannot find the 20 amps outlet, you'll need an electrician to install it as well as installing the new 20 amp breaker into the breaker panel.