Thanks for the responses.

Dog,
The manual doesn't state anything more in depth than what I mentioned. If you want to check it out, the Seminole POH PDF is available as a top result in a google search. On the Seminole, the static port is located out on the wing on the Pitot head, so I doubt if warming the cabin would affect it.

JNB,
The go-to systems guy. That makes sense to me. Do you have a resource that could confirm that or are you speaking from your experience?

BTW - you left me hanging with a Vmc thread a while back, guess you were tired of the topic haha - no worries!