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Pete C.

wrote:

Good possibility? It is a definite FACT. With the 30 amp rating of the
conditioner,a 20 amp plug would be a requirement. Particularly on a 20
amp circuit.

Don't assume a 30A rating requires a 30A plug. That rating is the
maximum input current, and you can absolutely change the plug to a lower
rating if the load on the conditioner is less than full load. The
circuit protection is at the panel feeding the receptacle, so if that
receptacle is on a 15A or 20A circuit it is fine. If the load is too
high the breaker will trip.