I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: 1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. Surely, they couldn't all make the same mistake.

So, any advice?

On Mar 25, 2:51*pm, Dom wrote:
I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

call the company that installed your new furnace and tell them of the
issues, there may be a simple solution...

On Mar 25, 3:45*pm, bob haller wrote:
On Mar 25, 2:51*pm, Dom wrote:









I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

call the company that installed your new furnace and tell them of the
issues, there may be a simple solution...

Oh, i did that long ago. They say it is just oil-canning, and not
their problem. But what they don't know is that in cold weather it is
intolerable. And whether it is oil-canning or not, I want it fixed.

On 3/25/2013 12:52 PM, Dom wrote:
On Mar 25, 3:45 pm, bob haller wrote:
On Mar 25, 2:51 pm, Dom wrote:









I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: 1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. Surely, they couldn't all make the same mistake.

So, any advice?

call the company that installed your new furnace and tell them of the
issues, there may be a simple solution...

Oh, i did that long ago. They say it is just oil-canning, and not
their problem. But what they don't know is that in cold weather it is
intolerable. And whether it is oil-canning or not, I want it fixed.

if it's oilcanning, it could be caused by simply expansion and
contraction. tightening them could even make it worse. you want a bit of
looseness to allow the expansion to not force the ducts to bend.
however, that makes them leak air, which also isn't good.

you'd need to go to flex ducts to get rid of all the noise i would expect.

On Mar 25, 4:14*pm, chaniarts wrote:
On 3/25/2013 12:52 PM, Dom wrote:









On Mar 25, 3:45 pm, bob haller wrote:
On Mar 25, 2:51 pm, Dom wrote:

I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down..

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

call the company that installed your new furnace and tell them of the
issues, there may be a simple solution...

Oh, i did that long ago. *They say it is just oil-canning, and not
their problem. *But what they don't know is that in cold weather it is
intolerable. *And whether it is oil-canning or not, I want it fixed.

if it's oilcanning, it could be caused by simply expansion and
contraction. tightening them could even make it worse. you want a bit of
looseness to allow the expansion to not force the ducts to bend.
however, that makes them leak air, which also isn't good.

you'd need to go to flex ducts to get rid of all the noise i would expect..
Good point. I'll be sure to tell the home improvement guy about the
flexible ducts. Do you think I'm safe in saying it is not just the
amount of air flow?

On 3/25/2013 1:51 PM, Dom wrote:
On Mar 25, 4:14 pm, chaniarts wrote:
On 3/25/2013 12:52 PM, Dom wrote:









On Mar 25, 3:45 pm, bob haller wrote:
On Mar 25, 2:51 pm, Dom wrote:

I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: 1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. Surely, they couldn't all make the same mistake.

So, any advice?

call the company that installed your new furnace and tell them of the
issues, there may be a simple solution...

Oh, i did that long ago. They say it is just oil-canning, and not
their problem. But what they don't know is that in cold weather it is
intolerable. And whether it is oil-canning or not, I want it fixed.

if it's oilcanning, it could be caused by simply expansion and
contraction. tightening them could even make it worse. you want a bit of
looseness to allow the expansion to not force the ducts to bend.
however, that makes them leak air, which also isn't good.

you'd need to go to flex ducts to get rid of all the noise i would expect.
Good point. I'll be sure to tell the home improvement guy about the
flexible ducts. Do you think I'm safe in saying it is not just the
amount of air flow?


that would be pretty far down on my list of possibilities. you'd have to
have one heck of a blower to bend the metal. the major cause of this is
heat/cool cycles causing metal expansion and flexing.

flex ducts aren't as efficient as smooth metal ducts (they're rougher
inside), so you'll get lower velocities i would expect.

On 3/25/2013 4:14 PM, chaniarts wrote:
On 3/25/2013 12:52 PM, Dom wrote:
On Mar 25, 3:45 pm, bob haller wrote:
On Mar 25, 2:51 pm, Dom wrote:









I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: 1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. Surely, they couldn't all make the same mistake.

So, any advice?

call the company that installed your new furnace and tell them of the
issues, there may be a simple solution...

Oh, i did that long ago. They say it is just oil-canning, and not
their problem. But what they don't know is that in cold weather it is
intolerable. And whether it is oil-canning or not, I want it fixed.

if it's oilcanning, it could be caused by simply expansion and
contraction. tightening them could even make it worse. you want a bit of
looseness to allow the expansion to not force the ducts to bend.
however, that makes them leak air, which also isn't good.

you'd need to go to flex ducts to get rid of all the noise i would expect.


I don't think that is a good idea.
If this is a rectangular duct, then flexible ducts will restrict the air
flow... Sounds like you need the insulated duct that I have. It is not
metal, and it also keeps the heat in the duct. Mine are fiber insulated
with metalic foil. They are very easy to make and I am sure any
reputable HVAC firm will be glad to do it, if you are opening the wall
or cieling.

--
Jeff

On Mar 25, 7:15*pm, woodchucker wrote:
On 3/25/2013 4:14 PM, chaniarts wrote:







On 3/25/2013 12:52 PM, Dom wrote:
On Mar 25, 3:45 pm, bob haller wrote:
On Mar 25, 2:51 pm, Dom wrote:

I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

On Mon, 25 Mar 2013 12:52:26 -0700 (PDT), Dom
wrote:




call the company that installed your new furnace and tell them of the
issues, there may be a simple solution...

Oh, i did that long ago. They say it is just oil-canning, and not
their problem. But what they don't know is that in cold weather it is
intolerable. And whether it is oil-canning or not, I want it fixed.

Oil canning is most likely the cause, a very common problem with hot
air heat. If the furnace guy put in the furnace and not the ducts, he
is probably off the hook on this. Did the old furnace make the same
noises?

The home improvement guy is not the guy to fix it unless he is
familiar with this type of problem. You need a good sheetmetal man
that knows how to design and install ducts.

Most likely, you have to cut the duct and install a flexible coupling
to take up the expansion when the duct is heated. If you have long
straight runs and do not allow for movement, you get oil canning. It
should be allowed to float.

http://www.flexicraft.com/Metal_Expa...ts/Metal_Duct/


The furnace guy should have been able to recommend a tin knocker, but
it sounds like he just wants out. Now it is up to you to find
someone. I'd ask around at the local plumbing supply house or a good
heating contractor.

Great info Ed. Between you, Tony, and Trader4 I have a lot to go on and a lot of things to check out before I hire a home improvement guy.

Dom wrote:
Great info Ed. Between you, Tony, and Trader4 I have a lot to go on
and a lot of things to check out before I hire a home improvement
guy.

If you haven't taken care of this yet, here's something you may want to try
first.

You said the duct is in the ceiling and I assume there is no attic space
above it where you can access the duct from above. So, if it is in the
ceiling, that probably means that it runs along the ceiling above the
sheetrock between two ceiling joists. Ceiling joists are usually 16 inches
apart (16 inches from the center of one joist to the center of the next
joist). So, if you were taking out a section of the sheetrock to completely
access the duct, you would probably take out a section that is 16 inches
wide and whatever length you need. Then, a replacement piece of sheetrock
would get screwed back in place to the two joists and the edges taped and
patched. (NOTE: If the duct is in a soffit, it may be a little different,
but I am assuming your duct is in a flat ceiling).

But, here's my suggestion before taking out a big section of sheetrock.
First try cutting a small hole out of the sheetrock in the area where you
are hearing the sound. The hole could be just 6" x 6" or so. You just need
a utility knife or something similar to cut out that section. Then you
should be able to see the duct. With the hole there, watch and listen and
see what happens. "Maybe" you will actually be able to see the duct move or
pop when the big bang happens. That would be good news. But, even if you
can't see anything happening during the big bang, maybe you will be able to
hear that it is really coming from that location. And, maybe you can try
wedging something in between the sheetrock and the duct and see if that
changes the bang. If it were me, that's what I would do, even though I know
how to take out and replace larger sections of sheetrock etc. You could
even do more than one test hole if needed.

The main reason for trying this first is that is costs nothing to do it, and
if you are able to solve the problem from there, re-patching the small hole
will be very easy. It can be a do-it-yourself job even if you never did
that before just by watching a couple of YouTube videos that show the
process step by step. And, taking out a small hole or two first won't
change anything in the long run if you later need to take out (or have
someone else take out) a larger section of sheetrock.

bob haller wrote:
On Mar 25, 2:51 pm, Dom wrote:
I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: 1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. Surely, they couldn't all make the same mistake.

So, any advice?

call the company that installed your new furnace and tell them of the
issues, there may be a simple solution...

Hi,
In the mean time try to run the air handler at lower speed if you can
run the air handler at lpower speed and see what happens. Sounds like
duct balance is off between exhaust and return side.

On Mar 25, 8:52*pm, Tony Hwang wrote:
bob haller wrote:
On Mar 25, 2:51 pm, Dom wrote:
I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

call the company that installed your new furnace and tell them of the
issues, there may be a simple solution...

Hi,
In the mean time try to run the air handler at lower speed if you can
run the air handler at lpower speed and see what happens. Sounds like
duct balance is off between exhaust and return side.

Hmmmm. Interesting. I have the fan at the lowest possible speed
now. I'd didn't think about the balance, but then again, it's only
happening at one duct.

Dom wrote:
On Mar 25, 8:52 pm, Tony Hwang wrote:
bob haller wrote:
On Mar 25, 2:51 pm, Dom wrote:
I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: 1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. Surely, they couldn't all make the same mistake.

So, any advice?

call the company that installed your new furnace and tell them of the
issues, there may be a simple solution...

Hi,
In the mean time try to run the air handler at lower speed if you can
run the air handler at lpower speed and see what happens. Sounds like
duct balance is off between exhaust and return side.

Hmmmm. Interesting. I have the fan at the lowest possible speed
now. I'd didn't think about the balance, but then again, it's only
happening at one duct.

Hi,
Of course, heat can make the duct work somewhat expand and shrink every
time heating cycle comes. When air flow is not balanced the pressure
build up can make big banging sound when it is coming on or going off.
Also it can happen with filter's resistance to air flow, etc.
If you did not have the problem before new furnace.......

If it is a balance problem, would the noise show up at a duct or at the furnace? And how would I go about fixing it?

"Dom" wrote in message
...
I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: 1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. Surely, they couldn't all make the same mistake.

So, any advice?

Where are you located, a 95,000 BTU input gas furnace is huge unless your
house has no insulation, is also huge, or way up north. I have a large house
in Canada, and my furnace is 2/3 the size of yours.

You may have too much pressure, but also why is your furnace going into the
second stage all the time, this is normally used when it is very cold
outside and stage one cannot keep up.

With the blower on full and the heat on second stage, your old air ducts may
not be able to handle the extremes and be oil-canning. How old are your
ducts, old ones were made of heavier metal, and should be able to handle the
new equipment. You don't want a "handyman" messing with your ducts, he may
be good to drop the drywall but get a good sheet metal duct installer to
fix/replace your problem.

On Mar 25, 4:49*pm, "EXT" wrote:
"Dom" wrote in message

...





I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

Where are you located, a 95,000 BTU input gas furnace is huge unless your
house has no insulation, is also huge, or way up north. I have a large house
in Canada, and my furnace is 2/3 the size of yours.

95,000 isn't so huge.. They make them up to 120K, which is what I
have here in NJ in a 3100 sq ft house.
The one it replaced was 150K. A 100K would be OK
too, but 120 warms the house up faster if you have it
set back and come home early, which is nice.




You may have too much pressure, but also why is your furnace going into the
second stage all the time, this is normally used when it is very cold
outside and stage one cannot keep up.

Did he say it's going to 2nd stage all the time? Typically
most two stage are going to go to 2nd stage if it's recovering
or you move the themostat higher. If it's just maintaining,
then first stage is usually enough.




With the blower on full and the heat on second stage, your old air ducts may
not be able to handle the extremes and be oil-canning.

Even on full, the blower in heat mode is moving only
about 60% of the air that the same blower would
move in AC. I asked if he had AC and what happens with
that on or just fan only weeks ago, but I don't think it
was answered. That would go a long way toward figuring
out if it;s a temp expansion noise or the duct flexing from
air pressure.




How old are your
ducts, old ones were made of heavier metal, and should be able to handle the
new equipment.

A new furnace isn't putting any unusual demands on the
ducts. The air moved is about the same as a 30 year old
furnace.


You don't want a "handyman" messing with your ducts, he may
be good to drop the drywall but get a good sheet metal duct installer to
fix/replace your problem.- Hide quoted text -

- Show quoted text -

I'd say if you can see it flex and figure out where to brace
it so it doesn't move, no reason anyone can't do it.

On 3/25/2013 11:51 AM, Dom wrote:
I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: 1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. Surely, they couldn't all make the same mistake.

So, any advice?
Can you gain access to either of the two ducts? If so, see if they have
the crease that goes from one corner of the duct to the opposite corner.
These are there to strengthen the sheet metal and prevent what you are
hearing.

Paul

On Mar 25, 5:38*pm, Paul Drahn wrote:
On 3/25/2013 11:51 AM, Dom wrote:







I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

Can you gain access to either of the two ducts? If so, see if they have
the crease that goes from one corner of the duct to the opposite corner.
These are there to strengthen the sheet metal and prevent what you are
hearing.

Paul

I can't acces it except through the vent. I need to remove the sheet
rock, and I'd rather go through a home improvement guy for that.

On Mar 25, 5:46*pm, Dom wrote:
On Mar 25, 5:38*pm, Paul Drahn wrote:





On 3/25/2013 11:51 AM, Dom wrote:

I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down..

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

Can you gain access to either of the two ducts? If so, see if they have
the crease that goes from one corner of the duct to the opposite corner..
These are there to strengthen the sheet metal and prevent what you are
hearing.

Paul

I can't acces it except through the vent. *I need to remove the sheet
rock, and I'd rather go through a home improvement guy for that.- Hide quoted text -

- Show quoted text -

Just make sure you have everything in writing, including the
cost and don't get hosed by a home improvement guy.

On Mar 25, 6:10*pm, "
wrote:
On Mar 25, 5:46*pm, Dom wrote:









On Mar 25, 5:38*pm, Paul Drahn wrote:

On 3/25/2013 11:51 AM, Dom wrote:

I posted before about my noisy ducts -- crash, bang, pow, all night..
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

Can you gain access to either of the two ducts? If so, see if they have
the crease that goes from one corner of the duct to the opposite corner.
These are there to strengthen the sheet metal and prevent what you are
hearing.

Paul

I can't acces it except through the vent. *I need to remove the sheet
rock, and I'd rather go through a home improvement guy for that.- Hide quoted text -

- Show quoted text -

Just make sure you have everything in writing, including the
cost and don't get hosed by a home improvement guy.

Trader4, thanks for the info. You actually remembered me from my last
post? Wow. You're right on a few points -- no, 95k is not too large
at all, others around here (I'm in central jersey) have more, but I
did some research and I figured for my size home anything larger would
cycle too frequently. And no, I did not say I go into second stage.
Usually it is only the first stage, and I have it set so it stays
there for 12 (max) minutes.

I never did the fan only test because my thermostat does not have that
setting. Don't know why. I'm going to assume it is temp, and not air
pressure, because, like I said, the hvac company is very reputable,
and three other reputable companies tried to sell the same system.

On Mar 25, 6:23*pm, Dom wrote:
On Mar 25, 6:10*pm, "
wrote:









On Mar 25, 5:46*pm, Dom wrote:

On Mar 25, 5:38*pm, Paul Drahn wrote:

On 3/25/2013 11:51 AM, Dom wrote:

I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

Can you gain access to either of the two ducts? If so, see if they have
the crease that goes from one corner of the duct to the opposite corner.
These are there to strengthen the sheet metal and prevent what you are
hearing.

Paul

I can't acces it except through the vent. *I need to remove the sheet
rock, and I'd rather go through a home improvement guy for that.- Hide quoted text -

- Show quoted text -

Just make sure you have everything in writing, including the
cost and don't get hosed by a home improvement guy.

Trader4, thanks for the info. *You actually remembered me from my last
post? *Wow. *You're right on a few points -- no, 95k is not too large
at all, others around here (I'm in central jersey) have more, but I
did some research and I figured for my size home anything larger would
cycle too frequently. *And no, I did not say I go into second stage.
Usually it is only the first stage, and I have it set so it stays
there for 12 (max) minutes.

I never did the fan only test because my thermostat does not have that
setting. *Don't know why. *I'm going to assume it is temp, and not air
pressure, because, like I said, the hvac company is very reputable,
and three other reputable companies tried to sell the same system.

Why did I say central jersey? I'm in south jersey.

On Mar 25, 6:23*pm, Dom wrote:
On Mar 25, 6:10*pm, "
wrote:





On Mar 25, 5:46*pm, Dom wrote:

On Mar 25, 5:38*pm, Paul Drahn wrote:

On 3/25/2013 11:51 AM, Dom wrote:

I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

Can you gain access to either of the two ducts? If so, see if they have
the crease that goes from one corner of the duct to the opposite corner.
These are there to strengthen the sheet metal and prevent what you are
hearing.

Paul

I can't acces it except through the vent. *I need to remove the sheet
rock, and I'd rather go through a home improvement guy for that.- Hide quoted text -

- Show quoted text -

Just make sure you have everything in writing, including the
cost and don't get hosed by a home improvement guy.

Trader4, thanks for the info. *You actually remembered me from my last
post? *Wow. *You're right on a few points -- no, 95k is not too large
at all, others around here (I'm in central jersey)

That's where I am too. As I said, one advantage to being
a little bigger is that you can heat the house up faster.
I can go up about 6 deg an hour. That way if you don't
always come home at the same time, you can have it
set back and recover faster.



have more, but I
did some research and I figured for my size home anything larger would
cycle too frequently. *And no, I did not say I go into second stage.
Usually it is only the first stage, and I have it set so it stays
there for 12 (max) minutes.

Where is that set? Sounds like at the furnace and you
don't have a two stage thermostat? Ideally the thermostat
should make the selection because it knows what the
temp is and where it needs to go.



I never did the fan only test because my thermostat does not have that
setting. *Don't know why.

Well, it must be an odd thermostat, because every one
I've ever seen had it. What about AC? What does it do
with AC on, or haven't you had a day where you could
try it? On heat the blower should move around 900 -1200
cfm. On fan only typical would be maybe 1400. On AC, 1800-2000.


*I'm going to assume it is temp, and not air
pressure, because, like I said, the hvac company is very reputable,
and three other reputable companies tried to sell the same system.- Hide quoted text -


I don't see how the reputation of the HVAC company is
a factor. The blowers are what the blowers are. It's not
like Rheem is 2000 cfm and Trane is 800. For the same
size furnace they are about the same. And going from say
a 75K furnace to 110K, doesn't change it all that much
either. It is possible that they moved something slightly,
or didn't put screws, hangers back where they should
be. But I assume the noise isn't near the furnace, right?

You should have a pretty good idea if it's temp or air pressure. You
can hear the blower ramp up. If the noise occurs in the first 30 secs
or so, it;s likely air pressure,
because it's going to take longer than that to heat it
up. Also, the bangs I've heard from air pressure occur
both when it starts up and when it shuts off. Does it
bang right when the blower stops?

On 3/25/2013 3:23 PM, Dom wrote:
On Mar 25, 6:10 pm,
wrote:
On Mar 25, 5:46 pm, wrote:









On Mar 25, 5:38 pm, Paul wrote:

On 3/25/2013 11:51 AM, Dom wrote:

I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: 1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. Surely, they couldn't all make the same mistake.

So, any advice?

Can you gain access to either of the two ducts? If so, see if they have
the crease that goes from one corner of the duct to the opposite corner.
These are there to strengthen the sheet metal and prevent what you are
hearing.

Paul

I can't acces it except through the vent. I need to remove the sheet
rock, and I'd rather go through a home improvement guy for that.- Hide quoted text -

- Show quoted text -

Just make sure you have everything in writing, including the
cost and don't get hosed by a home improvement guy.

Trader4, thanks for the info. You actually remembered me from my last
post? Wow. You're right on a few points -- no, 95k is not too large
at all, others around here (I'm in central jersey) have more, but I
did some research and I figured for my size home anything larger would
cycle too frequently. And no, I did not say I go into second stage.
Usually it is only the first stage, and I have it set so it stays
there for 12 (max) minutes.

I never did the fan only test because my thermostat does not have that
setting. Don't know why. I'm going to assume it is temp, and not air
pressure, because, like I said, the hvac company is very reputable,
and three other reputable companies tried to sell the same system.

In that case, there must be a separate thermostat for the fan control. I
had an oil furnace, once, with a separate thermostat and it has a little
knob in the middle that would turn on the fan.

Paul

Dom wrote:
I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: 1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. Surely, they couldn't all make the same mistake.

So, any advice?

Earplugs. Fifty cents.

But I don't suppose I'll get much credit for an economical idea...

On Mar 26, 9:54*am, "HeyBub" wrote:
Dom wrote:
I posted before about my noisy ducts -- crash, bang, pow, all night.
I'm about to call a home improvement guy and have him remove the dry
wall on the ceiling, replace or tighten the duct, then repair the dry
wall. *I don't think it will be a big job, but someone told me that
the problem might be too much air going through the ducts because of
the new more powerful furnace (two stage, variable speed, 95K BTU).
Can someone advise me on this?

I think it is the heat because: *1) It happens at only two ducts, 2) I
get a noise when it cools down and sometimes long after it cools down.

More importantly, I got the furnace from a VERY reputable firm, and I
don't think they would make a mistake like that, and I got two other
quotes from other reputable firms, all of whom were ready to sell the
same furnace. *Surely, they couldn't all make the same mistake.

So, any advice?

Earplugs. Fifty cents.

But I don't suppose I'll get much credit for an economical idea...- Hide quoted text -

- Show quoted text -

They would have to be the type of earplugs you get at a firing range.
Trust me, this is a BANG!