Last Room on Ductwork Cold
I live in an 11 year old 2 story colonial with a forced air HVAC system. Overall the heat in the house is very confortable except for the third bedroom on the second floor. The supply duct for this room is the last one off of the main trunk in the basement. This room is typically 2-3 degrees colder that the thermostat is set for (and the rest of the rooms on the second floor). New windows were installed in the entire house last year and I don't feel any drafts there. It just seems as though the warm air getting into this room is either not as warm or there isn't alot of volume getting up there. I juse sealed all of the joins on the main trunk and the branches (where I could) with that aluminum type tape but that hasn't helped. How can I make this room a little warmer? Should I insulate the ductwork? I'm thinking of installing a small electric baseboard heater to help. I am concerend this year becuase this room wasn't used much but now is my 6 month old son's bedroom and he doesn't keep a blanket on him yet when he sleeps.
There is a return in the room but it is at the top of the wall (right below the celing). I was thinking today that that is taking all of the warm air out of the room (but I guess it works well during the AC season). Would I be better off moving the return to the bottom of the wall near the floor and then blocking the rest of the return that goes up to the ceiling? I don't think that I would be able to add another duct as the room is on the second floor above the living room and there is no easy path up to the room.
I have a "bonus" room above the garage that has one duct to it. In the summer it is way to warm and in the winter it is way to cold. I replaced the two lights in the room with ceiling fans/lights and that has helped during the summer but most importantly I put in an 8' electric baseboard heater. This has been a huge success. Not sure the exact impact on my electric bill but we are actually able to go into this room in the winter which we really needed. Cost about $100 total for everything, is very quiet and is the best solution for us.