I have personally noticed my RHP doesn't heat the air very well, so it has a CHE to back it up. I also have to cover up the large glass doors with sleeping bags as the glass allows too much heat to escape even with the apartment being heated. During the summer I can have it uncovered. But we're going to be moving soon so hopefully I can have the room he's in heated enough that I won't have to wrap it anymore. We're dropping into the 30's here on some nights, with it usually being 40-50F or 60F on a warm night. We're lucky if day time temps reach the 70's, although we've had one or two in the mid to high 70's recently. I don't expect too many more, we're getting an early winter here in the mountains.