Had our 2009 3490BHS out last weekend, and it was fairly cool and rainy. It cooled off quite a bit at night, so we turned on the furnace to keep the trailer warm for the kiddies. In the morning, we woke up quite warm and cozy, but when we went downstaris, there was a VERY noticable difference in temperature, it was almost cold in the kitchen / bunk area compared to the upper bedroom. I do know that heat rises, but is this normal? We even ran the ceiling fan and it didn't help alot. Does anyone block the vents in the upper area? Are there any other tricks?