||12-08-2009 11:28 PM
Furnace intake noise question
The lower level of my house (below grade) has 3 rooms: a family room with a fireplace, a home office and the boiler room. I recently put in the office and got rid of a slotted door that was in there and replaced it with a solid door, but also added 2 vents in the family room so the furnace could pull air from somewhere. When I am watching tv in the family room and the heat/AC goes on, it gets very loud. I tried putting in a bigger register to 20x20 and tried sound insulation in the inside of the duct, but it is still the same. I laid a piece of drywall up against the intake and the noise was gone. The intake currently takes air from the family room then it goes through a filter system and into the furnace. The furnace in the boiler room is about 4 feet from the family room wall so I would like to know if I could cut the ductwork back then put a 20x20 register on the ductwork in the boiler room. THis will allow me to permanently cover up the hole in the wall and the furnace would still be pulling in air, only it would be pulling in air from the boiler room and the noise would be gone. This may be a stupid question, but I don't know what else to do. THanks a lot for your help.