I live in a 1-story house that was built in 1960. As there is no basement, the furnace is located in a utility closet in the center of my house. That closet is surrounded on two sides by the living room. The furnace itself is about 6 years old.
There are two cold air intakes. The smaller one opens to the hallway on one side, through a tubular duct about 8" in diameter. The larger one opens to a wall in the living room, and the furnace is built right up against that opening, so the fan is just inches from the vent grating. The problem is that when the fan is running, it’s very loud. It makes it a pain to watch TV in the living room. It’s that cold air return that is the sole source of the noise. The vents that exhaust into the other rooms are quiet as can be.
The very loud “whoosh” of air being sucked into the intake vent is beyond obnoxious. It does this with the A/C, of course, but the A/C never ran as much as the furnace does. Now that the weather is getting chilly and the firnace spends an appreciable amount of time blowing, I’m getting desperate for a solution.
Any tricks that can keep the blower quiet? Help me before I decide that freezing to death is better than listening to it.