Even though we have only one finished room (a guest room) on the
second floor of this new house, looking ahead to the time when the
rest of the 2nd floor may be finished, our HVAC subcontractor put in a
large furnace and AC for it, one big enough to take care of several
rooms. The problem now is the noise. When it comes on, it sounds
like a jet plane taking off. The subcontractor has suggested
diverting a large part of the furnace/AC output into the unfinished
attic space, but that will mean that most of what we pay for up there
will be wasted. Can anyone suggest other solutions?
Thanks for any comments.
| Even though we have only one finished room (a guest room) on
| second floor of this new house, looking ahead to the time when
| rest of the 2nd floor may be finished, our HVAC subcontractor
put in a
| large furnace and AC for it, one big enough to take care of
| rooms. The problem now is the noise. When it comes on, it
| like a jet plane taking off. The subcontractor has suggested
| diverting a large part of the furnace/AC output into the
| attic space, but that will mean that most of what we pay for up
| will be wasted. Can anyone suggest other solutions?
| Thanks for any comments.
What noise? Do you mean air rushing out of the vents? The
blower coming on? Both? Other? Ass-u-me it's a forced air
system from your descrip.
Sending output to unused, unwanted places is, uhhhh, shall was
say, STUPID? I bet that guy's union would like to hear about
this, if you feel like the effort! And so especially would the
BBB and your local code enforcement office. Talk to the latter;
they may have some good advice for you, but you gave no hint of
where you're located or even urban/suburban/exurban/non-urban.
Too little information for anything definitive.
But, that is about the worst advice I've ever heard of coming
from a reliable and honest contractor. Something's not cricket,
either with your post or that contractor. I'd guess at this time
that you have more issues than this one because it's a LOT more
involved here than "extra" capacity.
You were very wise to consider the extra capacity, and it's a
very smart move that's cheaper today than later, but ...
something's very wrong here.
I suggest another post with more details.
This is Turtle.
Tell the hvac fellow to drop the fan speed on the furnce / air handler by 1
speed. Most have a selections of 4 or more. Drop one speed till you can open up
the new addition and be able to let the air flow to the other areas. Dropping
one speed will not hurt a thing and they do make a lot less noise by even one
I think Turtle's advice makes a lot of sense because an over capacity
AC unit won't take the humidity out as well as one sized properly
because it doesn't run long enough. So the lower speed may help. This
might be why the subcontractor wanted to waste some air in an unused
space and he did not have your financial interest at heart.
This is Turtle.
I'm still wondering here as to why he does not want to just lower 1 speed and
have more dehumitifing and just a little less air. Maybe he has a Grossly over
sized unit or too small of ductwork and needs the extra air to keep it from
freezing. There is something he is not letting out here for some reason or the
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