When my furnace is operating ( heat mode ) the blower motor on high, the
cold air return vents make a howling noise,( in my bedroom ) due to the
suction of the blower motor, pulling the air thru the vent.
Is there a way to defuse the air being returned to( that particular vent )
the furnace, with out reducing the amount of air being returned to the
The duck work amplifies the noise, and it resonates in the bed room.
Sounds like your system doesn't have enough return air ducking. You oughta
let a heating guy in and take a quack at it. Somewhere on the web you can
find a chick who will fit the bill. But your original ducking isn't all it's
quacked up to be.
Might want to try a gaggle search on return air ducking?
If your furnace is running with inadequate return air ducking, the energy
bill is probably costing you a waddle of money. It really is goosing you
right in the pocket.
Maybe you can find a techie to get over there right quack?
It could be a sign of inadequately-sized ductwork, or at least, a grille
that may be too small.
But, even if they are sized correctly.........I've had jobs where we have
installed Brand X return grilles and find that they 'sing' when air is
moving through them. We remove them and replace than with Brand Y, same
size, but a slightly different configuration or construction....and the
problem goes away.
Just so you know, (no flaming, just facts) that is a sign of an improper
manual D, and you have an undersized return, if only by a few square inches.
A properly sized return you should almost hear nothing.....just finished one
that has 3 in the home and you actually can not tell if the units running or
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