Thanks for the quick replies everyone, I appreciate it.

I'm not sure exactly how low the ambient temps will drop overall but I think they'll wind up being low enough to cause some concern. She's in a fair sized room, so while I will consider an oil heater, it's probably going to be my last resort.

I should have worded my question a bit differently. I've heard from some people that radiant heat panels aren't the best solution for ambient heat because they primarily heat the floor of the enclosure. Is this true / an issue?