Sure you could. Of course depending on how big your coop is, it may/may not make much of a temp. difference. But you don't want a big temp. difference anyway, right?? I think most people put those things right behind the roosts, just to give a bit of warmth while roosting. They're supposed to be very safe. We're using one of those radiator looking self-contained oil type heaters in our coop this winter. It's on it's lowest setting available, and so far is working like a charm. But I've had my eye on the flat panel heaters like the one you posted about...still waiting to hear more feedback from folks who currently use them...