IMO, I wouldn't use an economy rack in a cool room. There's nothing to insulate those tubs. Actually, I'm not so sure I'd use a fully enclosed rack in a room that cool, either. Your animals may have a hot spot to lie directly on, but that heat tape isn't going to be able to warm the air in them enough to make *that* much of a difference. Have you thought about adding a heater to the room to bump those temps up?

AP economy racks have a slot in the shelves for your probe. I put the probe right in the middle of the rack. I'm not sure if your controller will work, as I have no experience with it. Maybe someone else will have.

AP racks keep humidity just fine.