My home has about 900 sq feet per floor, 1st floor has a fairly open floor
plan w/ four rooms and a half bath. 2nd floor has three bedrooms(each with
a large walk-in closet) and two full baths. On the first floor fairly out
of the way is one return, that is the only return on the floor. The second
floor also has only one return and it is centrally located in the hallway.
Will I get better and more even heating/cooling by leaving all doors open?
One of the bedrooms is a guest bedroom so the door is always closed to keep
the pups out. Also, the returns are both fairly loud, when we first moved
in I actually thought there were fans running behind the vents. A friend of
mine suggested the contractor didn't provide enough duct size to handle the
quantity of air being moved. What would be the best solution to improve
efficiency and reduce noise? It's that loud... Thanks!
With out seeing the installation your bud could be right.
What kind of filters are in the returns? Been changed lately?
You then need to find the static air pressure of the fan in the air handler
and then find a filter that is low enough to do a good job.
Try taking them out and then turn on the fan for a test.
Still whistle, duct issue. Be sure you leave the return grill down for
Time to check the ductwork in the attic. Some one might have crushed a duct
during a attic visit some time in the past.
Is the noisy-ness coming from inside the duct or from air rushing over the
vent at the return opening. If the latter, a different vent cover might
Your friends suggestion must be based on the assumption the air is moving
too quickly in the duct. That may not be true though it would be a source
of noise. A perfect system would be quiet and be sized appropriately,
your's may only satisfy the last part.
If your doors have at least some gap at the bottom, you should get good air
mixing but if some rooms seal this gap due to carpeting, leaving the doors
open will help. Excessively sealed rooms will be cool because the air can't
get in, its already full.
Change your filters or if there is no filter, put one in. Running without a
filter can cause the air to move too fast due to the fact the resistance
from a filter is missing (especially newer high efficiency models). The
filter also forms an acoustic buffer between the fan blades and the air
intake register. High efficiency filters need to be changed more often (how
ironic, what's efficient about spending more money and working harder ;-) )
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