The furnace in our Solitude 368RD seems to work fine. I've ran it a few times on these cool days to get the new smell out of it. I noticed that all the ducts on the main floor and the bedroom put out a lot of air, but the one in the bathroom only puts out a little. I just figured it was restricted at the factory because it is such a small room, but after reading some threads I'm not too sure now. I'm getting the trailer ready to leave Michigan for the winter and will need the furnace some days so I'm hoping this is the way it is suppost to be.