Is there anything that can be done to completely stop an annoying, "loud,
thud noise" that a duct is making? Repeatedly, about every 10 seconds, there
is only one duct in the basement that must be expanding/contracting and then
makes a loud thud sound.

The basement is unfinished and it's been difficult to determine exactly
which duct is making this noise. The noise is occuring only late at night
(and we haven't got a clue why it doesn't happen during the daytime) and the
loud noise is quite irritating (there are no ghosts that we know of).

We've checked to make sure that all the basement ducts are fully opened and
have also opened all the registers located in the ducts ... at first, these
adjustments seemed to lengthen the time between the "loud, thud noise" but
it has not entirely stopped the noise.

Closing the register in one of the bedrooms also seemed to helped, but
leaving this register closed is not a viable long term option. We suspected
this was helping because it is trapping heat for a longer time in the duct,
but we don't know for certain.

The home and furnace are 18 years old.

Thanks.

start by finding the thud.. shouldnt be too hard, you say it happens every
10 seconds...

i suspect the fix will become clear once that is done.

randy

"CJ" wrote in message
...
Is there anything that can be done to completely stop an annoying, "loud,
thud noise" that a duct is making? Repeatedly, about every 10 seconds,
there
is only one duct in the basement that must be expanding/contracting and
then
makes a loud thud sound.

The basement is unfinished and it's been difficult to determine exactly
which duct is making this noise. The noise is occuring only late at night
(and we haven't got a clue why it doesn't happen during the daytime) and
the
loud noise is quite irritating (there are no ghosts that we know of).

We've checked to make sure that all the basement ducts are fully opened
and
have also opened all the registers located in the ducts ... at first,
these
adjustments seemed to lengthen the time between the "loud, thud noise" but
it has not entirely stopped the noise.

Closing the register in one of the bedrooms also seemed to helped, but
leaving this register closed is not a viable long term option. We
suspected
this was helping because it is trapping heat for a longer time in the
duct,
but we don't know for certain.

The home and furnace are 18 years old.

Thanks.

The most likely place is close to the furnace in the return air
duct..especially in the middle of a long duct section. It is referred to
as :'Duct Boom' . Usually caused by thinner sheetmetal . Simply push on
the center of each long section of return air duct , near the furnace,
and duplicate the noise youre hearing. Then add a brace across the
entire section of that area and screw it on. This will hopefully stop
the duct from vibrating/being sucked in. If for some reason you cant
add a brace due to space limitations...then wedge something in there to
stop the noise. Good luck.

"DN B" wrote in message
...
The most likely place is close to the furnace in the return air
duct..especially in the middle of a long duct section. It is referred to
as :'Duct Boom' . Usually caused by thinner sheetmetal . Simply push on
the center of each long section of return air duct , near the furnace,
and duplicate the noise youre hearing. Then add a brace across the
entire section of that area and screw it on. This will hopefully stop
the duct from vibrating/being sucked in. If for some reason you cant
add a brace due to space limitations...then wedge something in there to
stop the noise. Good luck.


I had the same problem, and just wedged something against the duct so it
stayed pushed in.

I too had this problem.

What I did was to get out my SKS, and fire a few rounds into the ducts
about every 4 feet. Eventually, I heard a scream, and Bruce Willis came
out. He was really ****ed, but I told him: Look man, if you are going
to film Die Hard 4 in my house, you should have asked me first. He
agreed. Then I got him a band aid to put over the spot where his left
leg used to be, and we had a beer. He's really a pretty cool guy.

'What I did was to get out my SKS, and fire a few rounds into the ducts
about every 4 feet. Eventually, I heard a scream, and Bruce Willis came
out. He was really ****ed, but I told him: Look man, if you are going to
film Die Hard 4 in my house, you should have asked me first. He agreed.
Then I got him a band aid to put over the spot where his left leg used
to be, and we had a beer. He's really a pretty cool guy.'

I hope he had enough courtesy to not go and bleed all over the place

"Matt" wrote in message
ups.com...
I too had this problem.

What I did was to get out my SKS, and fire a few rounds into the ducts
about every 4 feet. Eventually, I heard a scream, and Bruce Willis came
out. He was really ****ed, but I told him: Look man, if you are going
to film Die Hard 4 in my house, you should have asked me first. He
agreed. Then I got him a band aid to put over the spot where his left
leg used to be, and we had a beer. He's really a pretty cool guy.

Hey Matt, remind me not to accept an invitation to hang out at your
place!....I got a kick out of your post....take care, Ross

the THUD was the sound of dave's **** hitting the
fan---------------WHERE'S THE PROOF YA ****HEAD?