I took off all of the heat & air conditioner registers today to clean them out if needed and check to make sure all were open and not blocked in any way. Most were pretty good - a few upturned pieces of alum. tape which I put down and a few places to add additional alum. duct tape and a little sawdust in the heat ducts. When I went to the register in the storage area and took it off there was no duct work leading to it. I was wondering if all are like that or is there supposed to be a hose coming from the heater to the storage area and one just did not get put on?