My family room (most used room in house) is about 6 deg F colder in the winter then the rest of the house. The room is on a cement slab. The rest of the house is over a basement. The gas forced air furnace is located in the basement. The furnace seems to be large enough for the house because it never runs constantly. There is one short 8" duct running to the family room with three register in sequence running off the duct. It would be difficult to run another duct. I want to get more heat to the room and am looking for suggestions. Here is what I was looking at:
1) Adding a duct fan to push out more heated air into the room.
Concerns: The fan would have to be located very close to the furnace and this may "unbalance" the heating system.
2) If you place your hand above the registers, the air never feels that really hot. I was thinking about placing a insulated flexible duct inside the 8" duct so the air wouldn't lose heat.
Concerns: Less volume of air would get to the room resulting in a colder room.
3) Do both 1 and 2.
Any suggestions would help! Thanks.
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